CPC Medical Coding Systems & Classification 3 — Questions and Answers
Question 1: In ICD-10-CM, the placeholder character 'X' is used to:
- Indicate an unspecified code
- Allow for future code expansion and maintain code length requirements (Correct answer)
- Denote a bilateral condition
- Flag a manifestation code
Correct answer: Allow for future code expansion and maintain code length requirements
The placeholder 'X' is inserted to allow future expansion of codes and to fill positions when a code requires a specific character in a later position.
Question 2: CPT modifier -51 is appended to indicate:
- A bilateral procedure
- Multiple procedures performed at the same session (Correct answer)
- A reduced service
- Assistant surgeon services
Correct answer: Multiple procedures performed at the same session
Modifier -51 indicates multiple procedures were performed at the same operative session, and payers often apply a reduction to the second and subsequent procedures.
Question 3: Which ICD-10-CM Excludes note means the two conditions cannot occur together and both codes should never be reported simultaneously?
- Excludes1 (Correct answer)
- Excludes2
- Code first
- Use additional code
Correct answer: Excludes1
Excludes1 indicates a 'pure' exclusion where the two conditions cannot coexist, so both codes should not be assigned for the same patient at the same time.
Question 4: ICD-10-CM chapter 21 codes (Z codes) are used to describe:
- Injuries and poisonings
- Factors influencing health status and contact with health services (Correct answer)
- Neoplasms
- Mental and behavioral disorders
Correct answer: Factors influencing health status and contact with health services
Z codes classify factors influencing health status such as screenings, vaccinations, and encounters for reasons other than illness or injury.
Question 5: In the CPT codebook, a triangle symbol (▲) next to a code indicates:
- A new code
- A revised code description (Correct answer)
- A code that has been deleted
- An add-on code
Correct answer: A revised code description
A triangle (▲) symbol in CPT denotes that the code's descriptor has been revised from the previous year.
Question 6: Which official guideline governs sequencing of the principal diagnosis in the inpatient setting?
- UHDDS definition of principal diagnosis (Correct answer)
- CMS-1500 instructions
- CPT Appendix A modifier rules
- HCPCS Table of Drugs
Correct answer: UHDDS definition of principal diagnosis
The Uniform Hospital Discharge Data Set (UHDDS) defines the principal diagnosis as the condition established after study to be chiefly responsible for the admission.
Question 7: The DSM-5 classification system is primarily used for coding:
- Surgical procedures
- Mental health and behavioral disorders (Correct answer)
- Pharmaceutical prescriptions
- Laboratory values
Correct answer: Mental health and behavioral disorders
The Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5), provides diagnostic criteria and codes for mental health conditions.
CPC Medical Coding Systems & Classification 3
In ICD-10-CM, the placeholder character 'X' is used to: