CCMA Medical Billing and Coding Basics 2 — Questions and Answers

Question 1: What is the purpose of a CMS-1500 form?

To document patient consent for treatment
To submit medical claims to insurance companies for reimbursement (Correct answer)
To record a patient's complete medical history
To request prior authorization for procedures

Correct answer: To submit medical claims to insurance companies for reimbursement

The CMS-1500 is the universal paper claim form used by physicians and other non-institutional providers to submit claims to Medicare, Medicaid, and most commercial insurers.

The CMS-1500 claim form (formerly HCFA-1500) is the standard paper claim form used by physicians, nurse practitioners, and other non-institutional providers. It contains: patient demographics, insurance information, diagnosis codes (ICD-10-CM), procedure codes (CPT/HCPCS), provider NPI, place of service, and dates of service. The electronic equivalent is the 837P transaction. Hospitals use the UB-04 (CMS-1450) for institutional billing. Most claims are submitted electronically through a clearinghouse today.

Question 2: Which ICD-10-CM coding rule requires the most specific diagnosis code available to be used?

Code to the highest level of specificity (Correct answer)
Use unspecified codes whenever possible
Code only the primary diagnosis
Use combination codes for all chronic conditions

Correct answer: Code to the highest level of specificity

ICD-10-CM guidelines require coding to the highest level of specificity — using the most detailed code that accurately describes the diagnosis.

ICD-10-CM guidelines mandate using the most specific code available, meaning the highest number of characters applicable for the documented diagnosis. ICD-10-CM codes range from 3 to 7 characters. For example, instead of coding M79.3 (panniculitis, unspecified), code M79.31 (panniculitis affecting neck) or M79.33 (panniculitis affecting ankle and foot) when the documentation supports it. 'Unspecified' codes are used only when the documentation lacks the information needed to code more specifically, and coders should not assume details not documented.

Question 3: What does the term 'clean claim' mean in medical billing?

A claim that has been audited for fraud
A claim submitted without errors that can be processed immediately for payment (Correct answer)
A claim for preventive services only
A claim with a zero balance owed

Correct answer: A claim submitted without errors that can be processed immediately for payment

A clean claim is one that contains all required information with no errors or missing data, allowing the payer to process it immediately without requesting additional information.

A clean claim contains accurate, complete information and can be adjudicated without additional information from the provider. Elements of a clean claim: valid CPT and ICD-10-CM codes, correct patient and insurer demographics, valid NPI, appropriate place of service code, correct dates, and any required modifiers. Insurance companies are required by most state laws to process clean claims within a specified timeframe (typically 30–45 days). 'Dirty' or 'rejected' claims have errors requiring correction before payment can be made.

Question 4: A modifier in medical coding is used to:

Replace a CPT code with a more general code
Provide additional information about a procedure without changing its definition (Correct answer)
Override insurance coverage limitations permanently
Indicate that a claim was filed late

Correct answer: Provide additional information about a procedure without changing its definition

A modifier is a two-digit code appended to a CPT code that provides additional information about the circumstances of the procedure without changing the procedure's definition.

CPT modifiers are two-digit alphanumeric codes appended to CPT codes to indicate special circumstances. Common modifiers: -25 (significant, separately identifiable E&M service on same day as procedure); -59 (distinct procedural service); -50 (bilateral procedure); -51 (multiple procedures same session); -RT/-LT (right/left side); -26 (professional component only); -TC (technical component only). HCPCS modifiers (letter-based) are used for additional specificity. Modifiers prevent claim denials for bundling and allow for proper reimbursement when unusual circumstances apply.

Question 5: When a provider accepts Medicare assignment, they agree to:

Charge any amount above the Medicare allowed fee
Accept Medicare's approved fee as full payment for covered services (Correct answer)
Bill the patient for the full billed amount regardless of Medicare's fee schedule
Refer all Medicare patients to a hospital setting

Correct answer: Accept Medicare's approved fee as full payment for covered services

Accepting Medicare assignment means the provider accepts Medicare's approved fee as full payment, collecting only the 20% coinsurance from the patient.

Medicare assignment means the provider agrees to: (1) Accept the Medicare fee schedule amount as full payment; (2) Bill Medicare directly; (3) Collect only the 20% coinsurance and deductible from the patient; (4) Write off the difference between the billed charge and the Medicare allowed amount. Non-participating providers may bill up to 115% of the Medicare fee schedule (limiting charge) but patients pay more out of pocket. All providers who bill Medicare must have a National Provider Identifier (NPI).

Question 6: What does the 'place of service' (POS) code 11 indicate on a CMS-1500 claim form?

Hospital inpatient
Emergency room
Office (physician's office) (Correct answer)
Ambulatory surgical center

Correct answer: Office (physician's office)

POS code 11 designates the physician's office as the location where services were rendered.

Common Place of Service (POS) codes: 11 = Office; 21 = Inpatient hospital; 22 = Outpatient hospital; 23 = Emergency room; 24 = Ambulatory surgical center; 31 = Skilled nursing facility; 32 = Nursing facility; 12 = Home. POS codes indicate where services were rendered and affect reimbursement rates — payers reimburse the same CPT code at different rates depending on the POS (e.g., office-based procedures reimburse differently than hospital outpatient procedures). Correct POS coding prevents claim denials.

CCMA Medical Billing and Coding Basics 2

What is the purpose of a CMS-1500 form?