ICD-10 Code K75.4 – Autoimmune Hepatitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K75.4 – Autoimmune hepatitis
What it is
Autoimmune hepatitis is a chronic liver disease in which the immune system attacks liver tissue. Use K75.4 when the record documents this specific diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Common findings include fatigue, jaundice, abnormal liver tests, and evidence of immune-mediated hepatitis on evaluation.
When to use this code
Use this code when the provider clearly diagnoses autoimmune hepatitis, whether newly identified or established. It may also apply when the chart describes autoimmune liver inflammation confirmed by clinical workup. If the note only says “hepatitis” without cause, check documentation.
Do not use for
Do not use K75.4 for viral hepatitis, alcoholic hepatitis, or unspecified liver inflammation. If the record does not confirm autoimmune cause, choose the documented condition instead.
Coding tip
Assign K75.4 only when the clinician explicitly links the hepatitis to an autoimmune process.