Which code indicates a primary diagnosis of acute appendicitis for a patient who is also HIV positive?

• A. K35.80
• B. E16.2
• C. Z21
• D. A05.1

Answer: (A)

The code indicating a primary diagnosis of acute appendicitis for a patient who is also HIV positive is indeed K35.80. This code is part of the ICD-10-CM system, which is used for coding various diagnoses.

K35.80 specifically refers to "Acute appendicitis, unspecified," which accurately represents the diagnosis of acute appendicitis in a patient. The specification of acute appendicitis is critical in clinical settings as it directly impacts treatment decisions and can indicate the need for surgical intervention, often required in such cases.

Regarding the other codes provided, E16.2 relates to a condition involving diabetes and not appendicitis, Z21 is a code for asymptomatic HIV, and A05.1 pertains to a type of bacterial infection in the gastrointestinal tract. Since the question revolves specifically around acute appendicitis, K35.80 is the only relevant code that accurately describes the primary diagnosis.