B17.9 Acute viral hepatitis, unspecified

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Acute hepatitis NOS
• Acute infectious hepatitis NOS

MS-DRG index

Defines the logic of DRG(s) 441-443 in MDC 07.

Approximate ICD-9-CM (GEMs)

• 070.9 Unspecified viral hepatitis without mention of hepatic coma (approximate)

Code annotations containing back-references to B17.9

Back-references to B17.9

• Type 2 Excludes: K75.0 Abscess of liver ("acute or subacute hepatitis NOS (B17.9)")

Back-references to B17

• Code First: H67 Otitis media in diseases classified elsewhere ("viral disease NEC (B00-B34)")
• Type 2 Excludes: K72 Hepatic failure, not elsewhere classified ("viral hepatitis with hepatic coma (B15-B19)")
• Type 1 Excludes: K73 Chronic hepatitis, not elsewhere classified ("viral hepatitis (chronic) (B15-B19)")
• Code Also: K74 Fibrosis and cirrhosis of liver (", if applicable, viral hepatitis (acute) (chronic) (B15-B19)")
• Type 1 Excludes: K75.2 Nonspecific reactive hepatitis ("viral hepatitis (B15-B19)")
• Type 1 Excludes: K75.3 Granulomatous hepatitis, not elsewhere classified ("viral hepatitis (B15-B19)")
• Type 1 Excludes: K75.9 Inflammatory liver disease, unspecified ("viral hepatitis (B15-B19)")
• Code First: M02 Postinfective and reactive arthropathies ("viral hepatitis (B15-B19)")
• Type 2 Excludes: T80.6 Other serum reactions ("serum hepatitis (B16-B19)")

Diagnosis Index entries for B17.9

• Hepatitis › acute
• Hepatitis › acute › infectious
• Hepatitis › acute › viral (see also, Hepatitis, viral)
• Hepatitis › infectious, infective › acute (subacute)
• Hepatitis › viral, virus › acute

Nearby codes

• B17.1 Acute hepatitis C
• B17.10 Acute hepatitis C without hepatic coma
• B17.11 Acute hepatitis C with hepatic coma
• B17.2 Acute hepatitis E
• B17.8 Other specified acute viral hepatitis
• B17.9 Acute viral hepatitis, unspecified (this code)