ICD-10 Code K75.81 – Nonalcoholic steatohepatitis (NASH) (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K75.81 – Nonalcoholic steatohepatitis (NASH)
What it is
K75.81 identifies nonalcoholic steatohepatitis, a liver condition with fat buildup plus inflammation and liver cell injury. It is used when the record specifically documents NASH rather than simple fatty liver.
Clinical signs
Clinical features vary; refer to documentation. You may see abnormal liver tests, imaging showing fatty liver, or biopsy findings consistent with steatohepatitis. Symptoms are often absent, so the diagnosis may be recorded after workup.
When to use this code
Use K75.81 when the provider documents NASH, nonalcoholic steatohepatitis, or biopsy-confirmed steatohepatitis without alcohol as the cause. It fits cases where the chart clearly distinguishes NASH from nonspecific fatty liver disease. Check documentation if the note only says hepatic steatosis or fatty liver.
Do not use for
Do not use this code for alcoholic liver disease or for simple hepatic steatosis without inflammation. If the record is unclear about etiology or the diagnosis is not stated, you should not assume NASH.
Coding tip
Code K75.81 only when the provider explicitly documents NASH or nonalcoholic steatohepatitis.