Certified Medical Assistant (CMA AAMA)Administrative: Billing, Coding and SchedulingHard
A medical assistant is reviewing a patient's chart for an outpatient visit. The physician documented 'possible pneumonia' but ordered further tests, and the final diagnosis is pending. According to ICD-10-CM guidelines for outpatient coding, how should 'possible pneumonia' be coded?
- ACode J18.9 (Pneumonia, unspecified organism).
- BCode symptoms only, not the possible diagnosis.
- CCode Z03.89 (Encounter for observation for other suspected diseases and conditions ruled out).
- DCode R09.89 (Other specified symptoms and signs involving the circulatory and respiratory systems).
Show answer & explanationAnswer & explanation
Correct answer: B. Code symptoms only, not the possible diagnosis.
For outpatient encounters, suspected or 'possible' diagnoses are NOT coded. Instead, code the symptoms, signs, or abnormal test results that prompted the visit. The final diagnosis will be coded once confirmed. Coding J18.9 (Pneumonia, unspecified organism) would be incorrect because it implies a confirmed diagnosis.
Why the other options are wrong
- A. This would be incorrect for an outpatient setting as it implies a confirmed diagnosis of pneumonia.
- C. This code is for observation for suspected conditions that were ruled OUT, which is different from a 'possible' pending diagnosis.
- D. This code represents symptoms, which is partially correct, but the general rule is to code the specific symptoms documented.
Outpatient Uncertain Diagnosis Rule
For outpatient encounters, never code a 'probable,' 'suspected,' 'possible,' or 'rule out' diagnosis. Instead, code the signs, symptoms, or abnormal findings.
- Applies strictly to outpatient settings.
- Inpatient coding allows for probable diagnoses.
- Accuracy ensures proper billing and medical record integrity.
Memory trick: Outpatient: If it's just 'possible,' code the symptoms, not the puzzle!