ICD-10 Code B20 – Human immunodeficiency virus [HIV] disease (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B20 – Human immunodeficiency virus [HIV] disease
What it is
B20 identifies HIV disease, meaning the patient has documented human immunodeficiency virus infection with clinical illness. Use it when the record shows HIV-related disease, not just exposure or screening.
Clinical signs
Clinical features vary; refer to documentation. Commonly, the chart may describe HIV-related opportunistic infection, HIV-associated syndrome, or other manifestations of immune compromise.
When to use this code
Use B20 when the provider documents HIV disease or AIDS-related illness. It also fits when an HIV infection is linked to a related condition, and the note supports that relationship. If the record only says HIV positive, confirm whether disease is documented.
Do not use for
Do not use B20 for asymptomatic HIV infection status or routine screening. If the documentation is unclear, check documentation rather than assuming active HIV disease.
Coding tip
Code B20 only when the diagnosis is clearly stated in the medical record, and capture any associated conditions separately when supported.