ICD-10 Code B16.9 – Acute hepatitis B without delta-agent and without hepatic coma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B16.9 – Acute hepatitis B without delta-agent and without hepatic coma
What it is
This code identifies an acute hepatitis B infection without delta-agent involvement and without hepatic coma. It means the patient has a new or recent HBV infection, but no documented severe liver failure or hepatitis D coinfection.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include jaundice, fatigue, nausea, abdominal discomfort, dark urine, and elevated liver enzymes in the setting of acute hepatitis B.
When to use this code
Use B16.9 when the provider documents acute hepatitis B and does not mention delta-agent coinfection or hepatic coma. It also fits cases where the record clearly supports acute HBV infection but omits further complication detail. Check documentation if the note suggests chronic infection or fulminant liver disease.
Do not use for
Do not use this code for chronic hepatitis B, hepatitis B with delta-agent, or hepatitis B with hepatic coma. If the record does not clearly state acute infection, check documentation.
Coding tip
Confirm the provider specifically documents “acute” hepatitis B before assigning B16.9.