ICD-10 Code B15 – Acute hepatitis A (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B15 – Acute hepatitis A
What it is
B15 identifies acute hepatitis A, a short-term liver infection caused by the hepatitis A virus. It is used when the record documents an active, acute episode rather than past exposure or immunity.
Clinical signs
Clinical features may include malaise, nausea, abdominal discomfort, dark urine, jaundice, and elevated liver enzymes. Clinical features vary; refer to documentation.
When to use this code
Use B15 when the provider documents acute hepatitis A, viral hepatitis A, or HAV infection with current illness. Apply it for confirmed or clinically diagnosed acute infection when the chart supports active disease. If the note only mentions exposure, vaccination, or immunity, check documentation.
Do not use for
Do not use B15 for chronic hepatitis, resolved past infection, or hepatitis A exposure without illness. If the record is unclear about acute disease, check documentation.
Coding tip
Confirm the provider’s wording for “acute” hepatitis A before assigning B15.