In an AIDS patient with Pneumocystis pneumonia, which combination of ICD-10-CM codes applies?

In an AIDS patient with Pneumocystis pneumonia, which combination of ICD-10-CM codes applies?

• A. B20,B59
• B. B20,B57
• C. B20,B12
• D. B20,B24

Answer: (A)

The key idea is to code the underlying disease plus the opportunistic infection. For an AIDS patient, the HIV disease is coded with B20, and the Pneumocystis jirovecii pneumonia infection is coded with B59. So, when AIDS with PCP is documented, you list the HIV code first (B20) and the PCP code second (B59). This pairing reflects the patient’s chronic condition (HIV/AIDS) and the acute opportunistic infection coexisting because of it. The other options don’t fit because they either pair HIV with a non-PCP condition or use a non-specific or unrelated HIV code (such as B12 or B24) that doesn’t capture AIDS with a defined opportunistic infection.

The key idea is to code the underlying disease plus the opportunistic infection. For an AIDS patient, the HIV disease is coded with B20, and the Pneumocystis jirovecii pneumonia infection is coded with B59. So, when AIDS with PCP is documented, you list the HIV code first (B20) and the PCP code second (B59). This pairing reflects the patient’s chronic condition (HIV/AIDS) and the acute opportunistic infection coexisting because of it.

The other options don’t fit because they either pair HIV with a non-PCP condition or use a non-specific or unrelated HIV code (such as B12 or B24) that doesn’t capture AIDS with a defined opportunistic infection.