RCC ICD-10-CM Diagnosis Coding for Radiology 2 — Questions and Answers
Question 1: What ICD-10-CM code is used for a screening mammogram encounter?
- Z12.31 (Correct answer)
- Z12.39
- Z12.11
- Z13.6
Correct answer: Z12.31
ICD-10-CM Z12.31 designates an encounter for screening mammogram for malignant neoplasm of breast.
Question 2: When imaging reveals an incidental finding unrelated to the reason for the study, how is it coded?
- It is not coded unless clinically evaluated (Correct answer)
- It is always coded as a secondary diagnosis
- It is the principal diagnosis
- It replaces the ordering diagnosis
Correct answer: It is not coded unless clinically evaluated
Incidental findings are only coded when the physician clinically evaluates and documents them.
Question 3: Which code set is used alongside ICD-10-CM to capture external causes for injury-related radiology studies?
- V00–Y99 External Cause codes (Correct answer)
- Z codes
- R codes
- S codes only
Correct answer: V00–Y99 External Cause codes
External cause codes (V00–Y99) are used to document how, where, and the activity at time of injury.
Question 4: An MRI is ordered for low back pain. Which ICD-10-CM code is most appropriate?
- M54.50 (Correct answer)
- M47.816
- M51.16
- M54.4
Correct answer: M54.50
ICD-10-CM M54.50 reports low back pain, unspecified, when no more specific diagnosis is available.
Question 5: When coding a contrast reaction during a radiology procedure, which ICD-10-CM category is used?
- T80.6 series (Correct answer)
- T36–T50 drug poisoning
- Z79 long-term drug use
- J68 chemical pneumonia
Correct answer: T80.6 series
Adverse effects from contrast media are coded using the T80.6xx series for complications of infusion/injection.
Question 6: A dual-energy X-ray absorptiometry (DEXA) scan is ordered for osteoporosis screening. Which Z code applies?
- Z13.820 (Correct answer)
- Z12.31
- Z13.5
- Z13.6
Correct answer: Z13.820
Z13.820 is the ICD-10-CM code for encounter for screening for osteoporosis.
RCC ICD-10-CM Diagnosis Coding for Radiology 2
What ICD-10-CM code is used for a screening mammogram encounter?