Certified Dental Coder (CDC) Exam — Questions and Answers

Question 1: Vestibuloplasty — ridge extension, secondary epithelialization — is reported with which CDT code?

D7320
D7350 (Correct answer)
D7340
D7310

Correct answer: D7350

D7350 is the CDT code for vestibuloplasty, a procedure to increase the depth of the oral vestibule for prosthetic purposes.

Question 2: What is the role of ethics in dental coding?

To minimize patient involvement in billing
To maximize profit for dental practices
To reduce the number of dental claims processed
To accurately reflect services rendered and ensure fair billing (Correct answer)

Correct answer: To accurately reflect services rendered and ensure fair billing

Ethics in dental coding dictate that codes must truthfully and accurately represent the services provided and the patient's condition. This ensures fair billing for patients and prevents fraudulent claims against insurance companies. Ethical coding practices maintain the integrity of the dental profession and build trust within the healthcare system.

Question 3: A dentist participates in a fee-splitting arrangement where they pay a marketing company a percentage of revenue for each new patient referred. This is MOST likely a violation of:

Anti-Kickback Statute (Correct answer)
False Claims Act
HIPAA Privacy Rule
OSHA Bloodborne Pathogen Standard

Correct answer: Anti-Kickback Statute

Paying a percentage of revenue for patient referrals is a classic kickback arrangement prohibited by the Anti-Kickback Statute because it can corrupt clinical decision-making.

Question 4: Which local anesthetic agent has the LONGEST duration of action for dental nerve blocks?

Lidocaine 2%
Mepivacaine 3%
Prilocaine 4%
Bupivacaine 0.5% (Correct answer)

Correct answer: Bupivacaine 0.5%

Bupivacaine has the longest duration of action among dental local anesthetics, providing 4–9 hours of pulpal anesthesia.

Question 5: Which ADA Principle of Ethics addresses the dentist's duty to keep professional knowledge and skills current?

Beneficence (Correct answer)
Veracity
Nonmaleficence
Patient Autonomy

Correct answer: Beneficence

Beneficence encompasses the duty to act in the patient's best interest, which includes maintaining competence through continuing education.

Question 6: What is the primary purpose of the ICD-10 coding system in dental practice?

To provide dental product pricing
To classify and code diseases and conditions (Correct answer)
To code dental procedures
To classify dental services and products

Correct answer: To classify and code diseases and conditions

The ICD-10 (International Classification of Diseases, 10th Revision) coding system is a globally recognized standard for classifying and coding health information. In dental practice, its primary purpose is to describe the patient's diagnosis, disease, or condition. These codes explain the medical necessity behind the dental services provided.

Question 7: How does professional liability insurance protect CDC practitioners?

Protecting against equipment theft
Covering disaster damage
Paying health premiums
Covering financial losses from claims of negligence or errors (Correct answer)

Correct answer: Covering financial losses from claims of negligence or errors

This insurance covers financial consequences of claims alleging negligence or mistakes in professional services.

Question 8: What is the recommended dose of epinephrine (1:1000) for treating an acute anaphylactic reaction in the dental office for an average adult?

1.0 mg IV
0.3 mg IM (Correct answer)
0.5 mg IV
0.1 mg IM

Correct answer: 0.3 mg IM

The standard adult dose for anaphylaxis is 0.3 mg (0.3 mL of 1:1000) epinephrine administered intramuscularly into the anterolateral thigh.

Question 9: Which medication used to treat opioid-use disorder requires special consideration before dental sedation due to its ceiling effect on analgesia?

Naltrexone
Methadone
Clonidine
Buprenorphine (Correct answer)

Correct answer: Buprenorphine

Buprenorphine is a partial opioid agonist with high receptor affinity and a ceiling effect; it blocks full agonist opioids and complicates pain management in dental procedures.

Question 10: A dental consultant is asked to review a claim from a personal friend's dental office. What is the most appropriate course of action?

Recuse themselves and assign the claim to another reviewer (Correct answer)
Review the claim with extra scrutiny to appear impartial
Deny the claim to avoid any appearance of favoritism
Approve the claim as a professional courtesy

Correct answer: Recuse themselves and assign the claim to another reviewer

Conflicts of interest must be avoided by recusing oneself from reviewing claims involving personal relationships.

Question 11: A consultant reviewing dental records for a Medicaid patient must determine if radiographs were taken at appropriate intervals. According to standard guidelines, bitewing radiographs for a high-caries-risk adult patient should be taken every:

Every 3 years
Every 5 years
6 to 12 months (Correct answer)
Only when symptoms arise

Correct answer: 6 to 12 months

For high-caries-risk adult patients, bitewing radiographs are recommended every 6 to 12 months per ADA/FDA radiographic guidelines.

Question 12: A dental consultant is reviewing a claim for a patient who received a full-mouth series of radiographs 10 months ago. The provider now requests bitewing radiographs. What is the most appropriate determination?

Approve only if the patient has active periodontal disease
Deny — full-mouth series was too recent for any additional radiographs
Pend for additional clinical documentation before deciding
Approve — bitewings serve a different diagnostic purpose than a full-mouth series (Correct answer)

Correct answer: Approve — bitewings serve a different diagnostic purpose than a full-mouth series

Bitewing radiographs serve a distinct diagnostic purpose (interproximal caries detection) and are not duplicative of a full-mouth series.

Question 13: What is the key clinical distinction between CDT codes D4341 and D4342?

D4341 is for surgical SRP; D4342 is for non-surgical SRP
D4341 covers four or more teeth per quadrant; D4342 covers one to three teeth per quadrant (Correct answer)
D4341 is for adults; D4342 is for pediatric patients
D4341 includes local anesthesia; D4342 does not

Correct answer: D4341 covers four or more teeth per quadrant; D4342 covers one to three teeth per quadrant

The only clinical distinction between D4341 and D4342 is the number of teeth treated: D4341 applies to four or more teeth per quadrant, while D4342 applies to one to three teeth per quadrant.

Question 14: What CDT code is reported for osseous surgery involving four or more teeth per quadrant?

D4240
D4260 (Correct answer)
D4270
D4261

Correct answer: D4260

D4260 describes osseous surgery (bone reshaping and recontouring) when performed on four or more teeth per quadrant, while D4261 is used for one to three teeth.

Question 15: Which CDT code is used to report a comprehensive periodontal evaluation for a new or established patient?

D0120
D0180 (Correct answer)
D0160
D0150

Correct answer: D0180

D0180 is designated specifically for a comprehensive periodontal evaluation that includes a detailed assessment of periodontal conditions, probing, and radiographic interpretation.

Question 16: Under the ADA's Principles of Ethics, 'patient autonomy' means the dentist must:

Obtain informed consent and respect the patient's right to self-determination (Correct answer)
Limit patient information to what the dentist deems necessary
Override patient preferences when the dentist disagrees
Make all treatment decisions on behalf of the patient

Correct answer: Obtain informed consent and respect the patient's right to self-determination

Patient autonomy requires providing sufficient information for informed decision-making and honoring the patient's right to accept or refuse treatment.

Question 17: What information is required in Box 35 of the ADA Dental Claim Form?

Treating dentist's NPI number
Patient's date of birth
Remarks or special conditions (Correct answer)
Place of treatment code

Correct answer: Remarks or special conditions

Box 35 of the ADA Dental Claim Form is reserved for remarks, special notes, or conditions relevant to the claim.

Question 18: Which scenario represents the concept of 'respondeat superior' in dental malpractice?

An employer dentist is held liable for negligent acts of an employee dental hygienist performed within the scope of employment (Correct answer)
A patient assumes the risk of a disclosed complication
A dentist refers a patient to a specialist to avoid liability
A patient consents to a procedure but later regrets it

Correct answer: An employer dentist is held liable for negligent acts of an employee dental hygienist performed within the scope of employment

Respondeat superior is a legal doctrine holding employers liable for employees' negligent acts committed within the scope of their employment.

Question 19: Which of the following describes 'fee-for-service' dental insurance?

The provider is paid a lump sum at the start of the plan year
The provider receives a monthly per-patient capitation regardless of services rendered
The insurer pays the provider a set fee for each covered procedure after it is performed (Correct answer)
The patient must use only in-network providers or receive no benefits

Correct answer: The insurer pays the provider a set fee for each covered procedure after it is performed

Fee-for-service (indemnity) plans reimburse the provider or patient a set amount per procedure code after treatment is rendered.

Question 20: A dental coder applies code D4341 (periodontal scaling and root planing) instead of D1110 (prophylaxis) for a patient who only received a routine cleaning. This represents:

Upcoding (Correct answer)
Waiver of copayment
Downcoding
Unbundling

Correct answer: Upcoding

Substituting a higher-reimbursing periodontal code for a routine prophylaxis that was actually performed is upcoding, a fraudulent billing practice.

Question 21: The Minimum Necessary Standard under HIPAA requires dental practices to:

Provide patients with full access to all staff files
Retain records for a minimum of 10 years in all states
Share complete records with any treating provider on request
Disclose only the PHI needed to accomplish the intended purpose (Correct answer)

Correct answer: Disclose only the PHI needed to accomplish the intended purpose

The Minimum Necessary Standard limits PHI disclosures to the least amount of information required to fulfill the specific purpose of the disclosure.

Question 22: What is the role of the gingiva in oral health?

To nourish the teeth with minerals
To support the enamel
To regulate the size of the tooth
To hold the tooth in place and protect the roots (Correct answer)

Correct answer: To hold the tooth in place and protect the roots

The gingiva, commonly known as gums, is the soft tissue that surrounds the base of the teeth and covers the alveolar bone. Its primary role is to provide a protective seal around the teeth, holding them firmly in place and shielding the sensitive tooth roots and underlying bone from bacteria and physical trauma. Healthy gingiva is essential for preventing periodontal disease and maintaining overall oral health.

Question 23: A patient presents with a 'missing tooth clause' in their policy. What does this mean for CDT code D6010 (implant placement)?

The patient receives a higher benefit for implants
The missing tooth clause only applies to bridges, not implants
The implant may be excluded because the tooth was missing before the policy effective date (Correct answer)
The implant is automatically covered at 100%

Correct answer: The implant may be excluded because the tooth was missing before the policy effective date

A missing tooth clause excludes coverage for teeth that were already missing when the current policy became effective.

Question 24: What is the function of the pulp inside a tooth?

To protect the tooth from decay
To stabilize the tooth in the jaw
To prevent tooth infection
To provide nutrients and sensory functions (Correct answer)

Correct answer: To provide nutrients and sensory functions

The pulp is the innermost part of the tooth, containing blood vessels, nerves, and connective tissue. Its vital functions include supplying nutrients to the dentin, which is essential for tooth health, and providing sensory input, such as pain, temperature, and pressure sensations. This makes the pulp crucial for the tooth's vitality and its ability to respond to external stimuli.

Question 25: A dental coder notices the dentist documented 'simple extraction' but the claim was submitted with the code for a surgical extraction. This is an example of:

Balance billing
Upcoding (Correct answer)
Unbundling
Downcoding

Correct answer: Upcoding

Upcoding occurs when a higher-complexity or higher-paying procedure code is billed than the service documented in the patient's record.

Question 26: Under HIPAA, which of the following is an example of a permissible disclosure of protected health information (PHI) without patient authorization?

Selling PHI to a research company for profit
Disclosing PHI to a dental insurer for claims processing (Correct answer)
Sharing PHI with a marketing firm for advertising purposes
Releasing PHI to an employer for workplace monitoring

Correct answer: Disclosing PHI to a dental insurer for claims processing

HIPAA permits disclosure of PHI for treatment, payment, and healthcare operations, including insurance claims processing.

Question 27: How do accurate coding practices benefit dental professionals?

By increasing patient wait times
By eliminating the need for patient consent
By reducing billing errors and improving reimbursement (Correct answer)
By decreasing the number of procedures performed

Correct answer: By reducing billing errors and improving reimbursement

Accurate coding practices ensure that claims submitted to insurance companies precisely reflect the services rendered and the diagnoses involved. This significantly reduces billing errors, which in turn minimizes claim denials and delays. Ultimately, this leads to more efficient and timely reimbursement for the dental practice, improving its financial stability.

Question 28: During assessment, a patient describes pain that wakes them from sleep, is spontaneous, and lingers after cold stimulus. This pulpal diagnosis is:

Pulp necrosis
Normal pulp
Irreversible pulpitis (Correct answer)
Reversible pulpitis

Correct answer: Irreversible pulpitis

Spontaneous pain, nocturnal pain, and prolonged response to thermal stimuli are hallmark symptoms of irreversible pulpitis.

Question 29: Which of the following clinical scenarios most clearly requires a referral letter to be included in the dental record?

A patient referred to an oral surgeon for a complex extraction (Correct answer)
A patient who paid their balance in full
A patient who switched to a different insurance plan
A patient who requested a different appointment time

Correct answer: A patient referred to an oral surgeon for a complex extraction

Referral letters document the clinical reason for referral, the receiving provider's information, and continuity-of-care communication, all of which must be retained in the record.

Question 30: Which of the following is considered a critical dental instrument requiring sterilization between patient uses?

All of the above (Correct answer)
Mouth mirror
Amalgam condenser
Radiograph film positioning device

Correct answer: All of the above

All listed items penetrate soft tissue or contact bone/blood and are therefore classified as critical instruments requiring sterilization.

Question 31: Which element of the dental record serves as the primary legal document in a malpractice dispute?

Insurance claim forms
Clinical chart notes (Correct answer)
Patient satisfaction surveys
Appointment scheduling logs

Correct answer: Clinical chart notes

Clinical chart notes are considered the primary legal document because they reflect the standard of care provided at the time of treatment.

Question 32: Which term describes the abnormal positioning of teeth outside the dental arch?

Gemination
Ectopic eruption (Correct answer)
Supernumerary
Transposition

Correct answer: Ectopic eruption

Ectopic eruption occurs when a tooth erupts in an abnormal position, potentially causing resorption of adjacent teeth.

Question 33: Which CDT code is used to report a full mouth debridement to enable a comprehensive periodontal evaluation?

D1110
D4910
D4341
D4355 (Correct answer)

Correct answer: D4355

D4355 is specifically designated for full mouth debridement, a gross removal of plaque and calculus that interferes with a comprehensive oral evaluation.

Question 34: When documenting recession during patient assessment, which measurement is most clinically relevant?

Probing depth alone
Distance from CEJ to the free gingival margin (Correct answer)
Total attached gingiva width
Distance from mucogingival junction to bone crest

Correct answer: Distance from CEJ to the free gingival margin

Recession is measured from the cementoenamel junction (CEJ) to the free gingival margin, indicating how much root surface is exposed.

Question 35: A dental patient receives a comprehensive periodontal evaluation. Which CDT code range applies?

D0100–D0999 (Correct answer)
D1000–D1999
D4000–D4999
D2000–D2999

Correct answer: D0100–D0999

Comprehensive periodontal evaluations are diagnostic services coded in the D0100–D0999 (Diagnostic) category.

Question 36: Which CDT code is used to report a free soft tissue graft procedure for the first tooth or edentulous area?

D4270
D4274
D4273
D4271 (Correct answer)

Correct answer: D4271

D4271 is used for a free soft tissue graft (harvested and completely detached from the donor site) for the first tooth, implant, or edentulous area treated.

Question 37: What is the hierarchy of controls in CDC risk management?

Insurance, training, documentation
Elimination, substitution, engineering, administrative, then PPE (Correct answer)
PPE first, then administrative
Assessment, planning, implementation

Correct answer: Elimination, substitution, engineering, administrative, then PPE

The hierarchy prioritizes the most effective controls first, from eliminating the hazard to using PPE as last resort.

Question 38: What are principles of good documentation in CDC?

Speed is the only factor
Include personal opinions
Accuracy, completeness, timeliness, objectivity, and legibility (Correct answer)
Only document positives

Correct answer: Accuracy, completeness, timeliness, objectivity, and legibility

Good documentation must be accurate, complete, timely, objective, and legible.

Question 39: Category III CPT codes are distinguishable from Category I codes because they:

Use a 4-digit number followed by the letter T (Correct answer)
Are numeric only and 5 digits long
Begin with the letter E
Are only used by dentists

Correct answer: Use a 4-digit number followed by the letter T

Category III CPT codes consist of four digits followed by the letter 'T' and represent emerging technologies and services.

Question 40: What does CDT code D4211 describe?

Provisional extracoronal splinting
Gingivectomy or gingivoplasty involving four or more teeth per quadrant (Correct answer)
Osseous surgery for one to three teeth per quadrant
Crown lengthening — soft tissue only

Correct answer: Gingivectomy or gingivoplasty involving four or more teeth per quadrant

D4211 is used for gingivectomy or gingivoplasty when performed on four or more teeth per quadrant; D4212 is used when one to three teeth are involved.

Question 41: A dental consultant identifies a claim where the narrative description does not match the procedure code billed. This is most consistent with:

Accurate upcoding for complexity
Standard coding variation between offices
An acceptable alternative billing practice
A documentation-to-billing discrepancy requiring review (Correct answer)

Correct answer: A documentation-to-billing discrepancy requiring review

When a narrative and procedure code conflict, it signals a potential billing error or misrepresentation that warrants further investigation.

Question 42: Which of the following best describes 'unbundling' in dental coding compliance?

Using a higher-level code than the service actually performed
Combining multiple procedure codes into a single comprehensive code
Submitting claims to two insurers simultaneously for the same service
Billing separately for procedures that should be reported with one comprehensive code (Correct answer)

Correct answer: Billing separately for procedures that should be reported with one comprehensive code

Unbundling means reporting individual component procedures with separate codes when a single comprehensive CDT code exists that covers all components, inflating reimbursement.

Question 43: What is a 'primary insurance' in dental billing?

The first insurance to pay for dental services (Correct answer)
The insurance that only pays for preventative services
The insurance that covers emergency dental care
The insurance that covers all dental services

Correct answer: The first insurance to pay for dental services

In situations where a patient has more than one dental insurance plan, the primary insurance is the one that pays first. Coordination of benefits rules determine which plan is primary and which is secondary, ensuring that the patient receives the maximum benefit without overpayment. Identifying the primary insurance correctly is essential for accurate billing and claim submission.

Question 44: What is the 'apex' of a tooth?

The junction of enamel and dentin
The tip of the root (Correct answer)
The cusp tip
The widest point of the crown

Correct answer: The tip of the root

The apex is the very tip of the root, where the apical foramen allows nerves and blood vessels to enter the pulp.

Question 45: What is the maximum safe daily dose of acetaminophen for a healthy adult patient to avoid hepatotoxicity?

6,000 mg
4,000 mg (Correct answer)
3,000 mg
2,000 mg

Correct answer: 4,000 mg

The FDA recommends a maximum daily dose of 4,000 mg acetaminophen for healthy adults, though 3,000 mg is preferred for elderly or at-risk patients.

Question 46: Under the ethical principle of 'veracity,' a dentist is obligated to:

Provide truthful information to patients about their diagnosis and treatment options (Correct answer)
Respect the patient's right to make their own decisions
Treat all patients regardless of ability to pay
Avoid actions that could harm the patient

Correct answer: Provide truthful information to patients about their diagnosis and treatment options

Veracity requires dental professionals to be truthful and honest in all communications with patients, including disclosing diagnoses and treatment options accurately.

Question 47: A dental practice's billing vendor who accesses PHI to process claims is classified under HIPAA as a:

Trading Partner
Covered Entity
Business Associate (Correct answer)
Hybrid Entity

Correct answer: Business Associate

A vendor that performs functions involving the use or disclosure of PHI on behalf of a covered entity is a Business Associate and must sign a Business Associate Agreement.

Question 48: Which of the following correctly describes how CDT codes differ from CPT codes?

CDT codes are maintained by CMS; CPT codes are maintained by the ADA
CDT codes are exclusively for dental procedures; CPT codes cover medical and surgical procedures (Correct answer)
CDT codes have 6 digits; CPT codes have 5 digits
CDT codes require ICD-9 diagnoses; CPT codes require ICD-10 diagnoses

Correct answer: CDT codes are exclusively for dental procedures; CPT codes cover medical and surgical procedures

CDT codes are dental-specific procedure codes maintained by the ADA, while CPT codes cover the broader range of medical and surgical services maintained by the AMA.

Question 49: A dental consultant reviews a case where nitrous oxide was administered without a written consent form. This represents a failure in:

Informed consent documentation (Correct answer)
Sterilization protocol
HIPAA compliance
Occupational exposure management

Correct answer: Informed consent documentation

Written informed consent should be obtained before administering sedation agents such as nitrous oxide as part of patient safety standards.

Question 50: Under the ADA's Principles of Ethics, a dentist who knowingly submits false insurance claims is violating the principle of:

Autonomy
Nonmaleficence
Veracity (Correct answer)
Justice

Correct answer: Veracity

Veracity requires dentists to be honest in all professional communications, including billing and insurance submissions.

Question 51: The principle of 'informed consent' in dental practice requires that the patient understands all of the following EXCEPT:

The nature of the proposed treatment
Available alternative treatments
The risks and benefits of the treatment
The dentist's personal financial incentives for recommending the treatment (Correct answer)

Correct answer: The dentist's personal financial incentives for recommending the treatment

Informed consent requires disclosure of treatment nature, risks, benefits, and alternatives, but does not require disclosure of the provider's personal financial incentives.

Question 52: An ICD-10-CM code has 7 characters. What do characters 4–6 generally represent?

Payer information
Etiology, anatomical site, or severity (Correct answer)
Provider specialty
Patient age and sex

Correct answer: Etiology, anatomical site, or severity

In ICD-10-CM, characters 4 through 6 provide additional specificity including etiology, anatomical site, and severity.

Question 53: A dental coder assigns D6010 for implant placement. Which CDT category does this fall under?

Oral Surgery (D7000–D7999)
Adjunctive Services (D9000–D9999)
Implant Services (D6000–D6199) (Correct answer)
Prosthodontics, Fixed (D6200–D6999)

Correct answer: Implant Services (D6000–D6199)

D6010 (endosseous implant body, placed) falls under the Implant Services subcategory within the D6000–D6199 range.

Question 54: During a comprehensive patient assessment, the Ramfjord teeth are used to assess which condition?

Periodontal status as an index measurement (Correct answer)
Caries risk
Occlusal stability
TMJ dysfunction

Correct answer: Periodontal status as an index measurement

The Ramfjord teeth (teeth 3, 9, 12, 19, 25, 28) serve as representative index teeth for periodontal epidemiological assessments.

Question 55: What is the primary purpose of dental insurance billing?

To ensure dental services are covered under the patient's insurance plan (Correct answer)
To record patient history
To track the number of services performed
To reduce patient costs for dental services

Correct answer: To ensure dental services are covered under the patient's insurance plan

The primary purpose of dental insurance billing is to facilitate the financial coverage of dental services for patients. By submitting claims, the dental practice seeks to have a portion or all of the treatment costs paid by the patient's insurance plan. This process helps reduce the patient's out-of-pocket expenses, making dental care more affordable and accessible.

Question 56: Which organization publishes and maintains the CDT code set?

American Dental Association (ADA) (Correct answer)
Centers for Medicare & Medicaid Services (CMS)
World Health Organization (WHO)
American Medical Association (AMA)

Correct answer: American Dental Association (ADA)

The American Dental Association (ADA) is the copyright holder and publisher of the CDT code set, updated annually.

Question 57: To reduce the risk of wrong-tooth extraction, which verification step is most effective immediately before extraction?

Review the billing code in the patient's account
Ask the dental assistant which tooth was charted for extraction
Rely solely on memory of the previous appointment
Confirm the tooth number by reviewing current radiographs and the signed treatment plan with the patient (Correct answer)

Correct answer: Confirm the tooth number by reviewing current radiographs and the signed treatment plan with the patient

Reviewing current radiographs and confirming the tooth number with the signed treatment plan and patient provides a critical safety checkpoint before extraction.

Question 58: During patient assessment, a 'click' upon mandibular opening and closing is documented. This finding is most consistent with:

Masseter hypertrophy
Osteoarthritis of the TMJ
Anterior disc displacement with reduction (Correct answer)
Myofascial pain disorder

Correct answer: Anterior disc displacement with reduction

A reciprocal click (upon opening and closing) indicates anterior disc displacement with reduction, where the disc recaptures during movement.

Question 59: A dentist notices that a child patient has unexplained bruising inconsistent with the parent's explanation. The best course of action is to:

Document findings and report suspected abuse to the appropriate authorities (Correct answer)
Confront the parent directly in front of the child
Consult with an oral surgeon before taking any action
Dismiss the case without documentation

Correct answer: Document findings and report suspected abuse to the appropriate authorities

Dental professionals are mandated reporters and must document and report suspected child abuse to appropriate authorities.

Question 60: What is a needs assessment in CDC Patient Assessment & Evaluation practice?

Identifying gaps between current conditions and desired outcomes (Correct answer)
Property appraisal
Benefits survey
Office supply list

Correct answer: Identifying gaps between current conditions and desired outcomes

A needs assessment identifies gaps between current performance and desired outcomes to justify improvements.

Question 61: A dental consultant is approached by a provider asking for 'inside information' about claim review criteria. The ethical response is to:

Share the information to foster a cooperative relationship
Report the provider to law enforcement immediately
Decline and explain that proprietary review criteria cannot be disclosed (Correct answer)
Share only general information while keeping specifics confidential

Correct answer: Decline and explain that proprietary review criteria cannot be disclosed

Proprietary claim review criteria are confidential; sharing them would compromise the integrity of the review process and create unfair advantages.

Question 62: When a patient has Medicaid as their secondary insurance and a private plan as primary, the dental coder should:

Submit only to Medicaid since it is a government payer
Submit to the private plan first; submit the EOB with the Medicaid claim as secondary (Correct answer)
Bill Medicaid for the full amount and ignore the private plan
Collect the full balance from the patient before billing either plan

Correct answer: Submit to the private plan first; submit the EOB with the Medicaid claim as secondary

Medicaid is almost always payer of last resort; the claim must go to the primary private insurer first, and the resulting EOB is submitted with the Medicaid claim.

Question 63: Radiographs in a dental record must be retained because they:

Are primarily needed for insurance audits
Replace the need for written chart notes
Are required only for specialist referrals
Document clinical findings and support treatment decisions (Correct answer)

Correct answer: Document clinical findings and support treatment decisions

Radiographs serve as objective evidence of clinical conditions and validate the necessity of recommended or completed treatments.

Question 64: A patient presents with a chief complaint of sensitivity to sweets. Which condition is most likely when sensitivity resolves immediately upon removal of the stimulus?

Irreversible pulpitis
Cracked tooth syndrome
Reversible pulpitis or early dentin hypersensitivity (Correct answer)
Acute periapical abscess

Correct answer: Reversible pulpitis or early dentin hypersensitivity

Sensitivity that resolves quickly after removal of the stimulus (sweet or cold) indicates reversible pulpitis or dentinal hypersensitivity with vital, recoverable pulp.

Question 65: Which diagnostic tool is most appropriate for detecting proximal caries in posterior teeth during initial patient assessment?

Panoramic radiograph
Periapical radiographs only
Bitewing radiographs (Correct answer)
CBCT scan

Correct answer: Bitewing radiographs

Bitewing radiographs provide the best visualization of proximal surfaces of posterior teeth for caries detection.

Question 66: A patient requests that their dental records not be shared with their insurance company. How should a dental professional respond?

Refuse to treat the patient if they withhold consent
Report the patient's request to the state dental board
Honor the request, but advise the patient that claims may be denied without records (Correct answer)
Share the records anyway since insurers have automatic access rights

Correct answer: Honor the request, but advise the patient that claims may be denied without records

Patients have the right to restrict disclosures, but must be informed that doing so may affect insurance payment for services.

Question 67: Under the CDC's 2003 Guidelines for Infection Control in Dental Health-Care Settings, saliva is considered a potentially infectious material for which reason?

It is presumed to contain blood even when not visibly bloody (Correct answer)
It is visibly contaminated with blood during dental procedures
It transmits prion diseases exclusively
It always contains active viral particles

Correct answer: It is presumed to contain blood even when not visibly bloody

CDC guidelines treat dental saliva as potentially infectious because oral procedures routinely introduce blood into saliva even when it is not visibly apparent.

Question 68: A dental consultant observes that a practice consistently documents 'WNL' (within normal limits) for all soft tissue examinations. This pattern is concerning because:

It may indicate the exam was not actually performed or findings were not individualized (Correct answer)
It violates OSHA documentation standards
Insurance payers reject claims with WNL notations
WNL is not an approved dental abbreviation

Correct answer: It may indicate the exam was not actually performed or findings were not individualized

Blanket 'WNL' notations without specific findings suggest the examination may be cursory or fabricated, raising concerns about quality of care and documentation integrity.

Question 69: Which CDT code added in recent CDT editions describes scaling in the presence of generalized moderate or severe gingival inflammation — full mouth?

D1110
D4355
D4346 (Correct answer)
D4341

Correct answer: D4346

D4346 was introduced to capture scaling performed when generalized moderate or severe gingival inflammation is present but the patient does not meet criteria for SRP (no bone loss).

Question 70: Which of the following best describes 'dual coverage' coordination of benefits?

A single plan that covers both dental and medical expenses
A patient covered by two dental plans where benefits are coordinated to avoid overpayment (Correct answer)
A patient who visits two different dental offices in the same year
Two deductibles applied simultaneously to one claim

Correct answer: A patient covered by two dental plans where benefits are coordinated to avoid overpayment

Dual coverage COB occurs when a patient has two dental insurance plans; the two insurers coordinate so that total reimbursement does not exceed 100% of the actual charges.

Question 71: A dental office must retain patient records for a minimum period set by state law. If state law is silent on the issue, HIPAA requires covered entities to retain documentation of their privacy policies for:

3 years from the date of creation or last effective date, whichever is later
Until the patient reaches age 21
10 years from the date the record was created
6 years from the date of creation or last effective date, whichever is later (Correct answer)

Correct answer: 6 years from the date of creation or last effective date, whichever is later

HIPAA requires covered entities to retain required documentation, including policies and procedures, for six years from the date of creation or the last effective date, whichever is later.

Question 72: A patient's plan pays 80% after the deductible for basic services. The allowed fee for a restoration is $200 and the annual deductible of $50 has not been met. How much does insurance pay?

$120 (Correct answer)
$160
$150
$80

Correct answer: $120

After applying the $50 deductible, the remaining $150 is subject to 80% coverage: $150 × 0.80 = $120.

Question 73: Why is accurate documentation important in CDC?

Only for medical/legal fields
Only for bureaucratic purposes
No impact on quality
It supports decision-making, compliance, and legal defensibility (Correct answer)

Correct answer: It supports decision-making, compliance, and legal defensibility

Accurate documentation supports quality assurance, compliance, legal defensibility, and knowledge continuity.

Question 74: When documenting local anesthesia in a clinical note, which information is most critical to include?

The patient's pain threshold assessment
The brand name of the anesthetic cartridge manufacturer
The total cost of anesthetic materials used
Type of anesthetic, quantity administered, and injection site (Correct answer)

Correct answer: Type of anesthetic, quantity administered, and injection site

Documenting the anesthetic type, volume, and injection site provides essential information for continuity of care and helps identify causes of any adverse reactions.

Question 75: What is a risk matrix used for in CDC practice?

Mapping facility layouts
Creating task schedules
Tracking attendance
Evaluating risks by plotting likelihood against impact severity (Correct answer)

Correct answer: Evaluating risks by plotting likelihood against impact severity

A risk matrix plots probability against consequences to prioritize which risks need immediate attention.

Question 76: A dental office receives a subpoena for a patient's records. What is the FIRST step the office should take?

Notify the patient and consult the office attorney before releasing records (Correct answer)
Redact all clinical notes and then release the remaining records
Immediately release all records to comply with the court order
Deny the request because HIPAA prohibits all disclosures without patient authorization

Correct answer: Notify the patient and consult the office attorney before releasing records

A subpoena alone (without a court order) generally requires patient notice and an opportunity to object, so legal counsel should be consulted before releasing records.

Question 77: An extraoral radiographic image — not otherwise specified — is reported using which code?

D0220
D0210
D0250 (Correct answer)
D0330

Correct answer: D0250

D0250 is the CDT code for an extraoral two-dimensional radiographic image, not otherwise specified.

Question 78: Post-operative care following tooth extraction typically falls under which billing category?

Billed as an office visit using E/M codes
Included in the extraction code unless separately documented as a separate visit (Correct answer)
Not covered by dental insurance
Always billed separately with a distinct CDT code

Correct answer: Included in the extraction code unless separately documented as a separate visit

Post-operative care is generally included in the extraction procedure code unless it represents a distinct, separately identifiable service.

Question 79: A dental consultant is asked to review a treatment plan that was developed without any diagnostic radiographs. What is the most significant concern with this treatment plan?

Treatment plans without radiographs are automatically approved
The consultant should request that the provider explain why radiographs were not taken
The plan may be too expensive to approve
The absence of radiographs means the treatment plan lacks essential diagnostic information to verify clinical necessity (Correct answer)

Correct answer: The absence of radiographs means the treatment plan lacks essential diagnostic information to verify clinical necessity

Radiographs are a foundational diagnostic tool; their absence leaves the clinical basis for the treatment plan unsubstantiated.

Question 80: A patient completed full mouth scaling and root planing six months ago and returns for a supportive care visit. Which code should be reported?

D4910 (Correct answer)
D4341
D0180
D1110

Correct answer: D4910

Once a patient has undergone active periodontal therapy, all subsequent supportive cleaning appointments are reported as D4910 (periodontal maintenance), not D1110.

Question 81: In assessing a patient for dry mouth during a dental consultation, which objective finding is most diagnostic?

Inability to float a cracker without water and frothy saliva (Correct answer)
Patient report of thirst at night
Pale pink gingiva
High caries rate in posterior teeth only

Correct answer: Inability to float a cracker without water and frothy saliva

Clinical signs of xerostomia include frothy saliva, inability to eat dry foods without water, and sticky mucosa upon examination.

Question 82: A dental office submits a claim for D2750 (porcelain-fused-to-metal crown) but the insurer pays as if it were D2710 (resin-based composite crown) due to a 'least expensive alternative treatment' clause. This is called:

Upcoding
Unbundling
Downcoding (Correct answer)
Bundling

Correct answer: Downcoding

Downcoding occurs when the insurer reimburses at a lower code than what was billed because the plan only covers the least expensive treatment alternative.

Question 83: Which document must accompany an oral surgery claim to support medical necessity for a hospital-based procedure?

Insurance card copy
Operative report and pre-operative evaluation notes (Correct answer)
Radiograph only
Patient consent form only

Correct answer: Operative report and pre-operative evaluation notes

An operative report and pre-operative evaluation notes are required to substantiate medical necessity for hospital-based oral surgery claims.

Question 84: Which of the following best describes an amendment to a dental record?

Adding a signed and dated addendum to correct or clarify a prior entry (Correct answer)
Deleting electronic entries without a trace in the audit log
Erasing and replacing incorrect entries with correction fluid
Shredding the original record and creating a new one

Correct answer: Adding a signed and dated addendum to correct or clarify a prior entry

Proper amendments involve a signed, dated addendum rather than altering original entries, preserving the integrity of the record.

Question 85: Which antihypertensive drug class is associated with drug-induced gingival overgrowth and requires dental monitoring?

Beta-blockers
ACE inhibitors
Calcium channel blockers (Correct answer)
Diuretics

Correct answer: Calcium channel blockers

Calcium channel blockers (especially nifedipine) are well-documented causes of gingival overgrowth due to reduced collagen degradation in fibroblasts.

Question 86: A dental assistant recaps a used needle using a one-handed scoop technique. Under OSHA's Bloodborne Pathogen Standard, this is considered:

Required when a safety syringe is not in use
Acceptable as a work practice control when a resheathing device is unavailable (Correct answer)
Acceptable as an engineering control alternative
Prohibited under all circumstances

Correct answer: Acceptable as a work practice control when a resheathing device is unavailable

OSHA prohibits two-handed recapping but permits the one-handed scoop technique as an acceptable work practice control when a mechanical resheathing device is unavailable.

Question 87: A dental practice wants to verify that its sterilizer is functioning properly after a mechanical failure was repaired. Which test should be performed BEFORE returning the sterilizer to routine use?

One chemical indicator test cycle
One Bowie-Dick test cycle only
A mechanical parameter printout review only
Three consecutive biological indicator test cycles with negative results (Correct answer)

Correct answer: Three consecutive biological indicator test cycles with negative results

After sterilizer malfunction or repair, CDC recommends running three consecutive biological indicator cycles without any processed load before returning the sterilizer to service.

Question 88: A dental practice receives a subpoena for a patient's records. The appropriate first action is to:

Immediately send all records to the requesting party
Consult with legal counsel before releasing any records (Correct answer)
Destroy any records that may be unfavorable
Notify the patient that records will be released without review

Correct answer: Consult with legal counsel before releasing any records

Consulting legal counsel ensures that the subpoena is valid and that the release complies with applicable laws, including HIPAA.

Question 89: A dental office's Notice of Privacy Practices (NPP) must be provided to new patients:

Annually, regardless of whether care was received
Within 30 days of the first treatment visit
Only if the patient requests it in writing
No later than the date of the first service delivery (Correct answer)

Correct answer: No later than the date of the first service delivery

HIPAA requires covered entities to provide the NPP no later than the date of the first service delivery to the individual.

Question 90: Which of the following best describes the ethical duty of 'nonmaleficence' as applied in dental consulting?

Avoiding decisions that result in unnecessary harm to patients or providers (Correct answer)
Treating all claims identically regardless of clinical context
Ensuring patients receive the most expensive treatment available
Maximizing profits for the insurance company

Correct answer: Avoiding decisions that result in unnecessary harm to patients or providers

Nonmaleficence means 'do no harm' — consultants must avoid decisions that unjustly harm patients, providers, or plan integrity.

Question 91: Which of the following is true about ICD-10 codes in dental practices?

They are used only for medical billing
They are used to report diagnoses and diseases (Correct answer)
They are used for patient insurance verification
They are used to report dental procedures

Correct answer: They are used to report diagnoses and diseases

ICD-10 codes are diagnostic codes that describe the patient's medical condition, disease, or injury, explaining the 'why' behind a dental visit. They are crucial for linking the dental treatment to a specific health issue. These codes are distinct from procedure codes, which describe the 'what' was done.

Question 92: What is the primary purpose of a code of ethics in CDC practice?

To define standard office hours
To determine salary structures
To establish professional conduct standards and guide ethical decision-making (Correct answer)
To set pricing for professional services

Correct answer: To establish professional conduct standards and guide ethical decision-making

A code of ethics provides a framework of professional values and behavioral standards that guides practitioners in ethical decisions while maintaining public trust.

Question 93: A patient's dental treatment plan includes a fixed bridge on teeth #3-#5. Tooth #4 was extracted two years ago, and the plan covers bridges but has a five-year waiting period for major restorative services. The member enrolled two years ago. What is the correct benefit determination?

Deny the bridge because the five-year waiting period for major restorative services has not been satisfied (Correct answer)
Waive the waiting period since the patient experienced tooth loss
Approve partial benefit based on two years of continuous coverage
Approve the bridge since the missing tooth predates enrollment

Correct answer: Deny the bridge because the five-year waiting period for major restorative services has not been satisfied

Waiting periods for major services must be fully satisfied; two years of enrollment does not meet a five-year waiting period requirement.

Question 94: What is evidence-based practice in CDC Patient Assessment & Evaluation?

Using newest unproven methods
Integrating research evidence with expertise and client needs (Correct answer)
Doing whatever clients request
Following intuition only

Correct answer: Integrating research evidence with expertise and client needs

Evidence-based practice combines research, expertise, and client preferences for optimal outcomes.

Question 95: A biopsy of oral tissue — hard, including bone — is coded with which CDT code?

D7285
D7290
D7295
D7286 (Correct answer)

Correct answer: D7286

D7286 is the CDT code for biopsy of oral tissue — hard, including collection of a sample involving hard tissue such as bone.

Question 96: When evaluating a treatment plan, a dental consultant determines that the proposed treatment is clinically appropriate but not covered under the member's benefit plan. What is the correct action?

Approve benefits at 50% to share cost with the member
Deny the claim and inform the member of their appeal rights and any out-of-pocket options (Correct answer)
Refer the case to a specialist for additional review
Approve the treatment since it is clinically necessary

Correct answer: Deny the claim and inform the member of their appeal rights and any out-of-pocket options

Clinical appropriateness does not override plan exclusions; the claim should be denied per plan terms with proper member notification of appeal rights.

Question 97: What is the primary function of the alveolar bone in oral anatomy?

It produces the enamel
It provides the tooth with its strength
It supports the teeth and keeps them in place (Correct answer)
It connects the teeth to the gums

Correct answer: It supports the teeth and keeps them in place

The alveolar bone is a specialized part of the jawbone that forms the sockets and supports the roots of the teeth. Its primary function is to provide structural support and stability, anchoring the teeth firmly within the jaw. This ensures the teeth remain in their proper position and can withstand the forces of chewing.

Question 98: According to the OSHA Bloodborne Pathogen Standard, which document must be completed within 24 hours of an occupational exposure incident?

State health department report
Confidential post-exposure medical evaluation (Correct answer)
Workers' compensation claim
OSHA 300 Log entry

Correct answer: Confidential post-exposure medical evaluation

OSHA requires that the employer provide a confidential medical evaluation and follow-up to be initiated promptly (as soon as feasible) after an exposure incident.

Question 99: A dental consultant learns that a colleague is approving claims for procedures that were never performed. The ethical obligation is to:

Confront the colleague privately and take no further action
Report the suspected fraud to the appropriate authority (Correct answer)
Approve similar claims to maintain consistency
Ignore it to maintain workplace harmony

Correct answer: Report the suspected fraud to the appropriate authority

Reporting suspected fraud to the appropriate authority (compliance officer, state board, or fraud hotline) is an ethical and often legal obligation.

Question 100: Which governing body maintains and updates the CDT code set used for dental radiographic billing?

AAPC
American Dental Association (ADA) (Correct answer)
American Medical Association (AMA)
CMS (Centers for Medicare & Medicaid Services)

Correct answer: American Dental Association (ADA)

The American Dental Association (ADA) owns and maintains the Current Dental Terminology (CDT) code set.

Certified Dental Coder (CDC) Exam

This certification validates proficiency in dental coding, including CPT, CDT, and ICD-10-CM codes, and understanding of dental insurance and billing practices.

100

Questions

120 min

Time Limit

70%

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