B18.1 Chronic viral hepatitis B without delta-agent

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

Applicable to

• Carrier of viral hepatitis B
• Chronic (viral) hepatitis B

Applies from B18 Chronic viral hepatitis

Includes

• Carrier of viral hepatitis

Use additional code

• code, if applicable, for ascites (R18.8)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 65 — Chronic Hepatitis
• CMS-HCC V22: HCC 29 — Chronic Hepatitis
• RxHCC V08: HCC 56 — Chronic Viral Hepatitis B and Other Specified Chronic Viral Hepatitis
• ESRD V24: HCC 29

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 070.32 Chronic viral hepatitis B without mention of hepatic coma without mention of hepatitis delta (approximate)

Code annotations containing back-references to B18.1

Back-references to B18.1

• Use Additional: C22 Malignant neoplasm of liver and intrahepatic bile ducts ("hepatitis B (B16.-, B18.0-B18.1)")

Back-references to B18

• 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)")
• Type 2 Excludes: Z22 Carrier of infectious disease ("carrier of viral hepatitis (B18.-)")

Diagnosis Index entries for B18.1

• Carrier (suspected) of › HB (c)(s)-AG
• Carrier (suspected) of › hepatitis (viral) › B surface antigen (HBsAg)
• Hepatitis › B › chronic
• Hepatitis › viral, virus › chronic › type › B
• Hepatitis › viral, virus › type › B › chronic
• Serum › hepatitis › carrier (suspected) of

Nearby codes

• B18 Chronic viral hepatitis
• B18.0 Chronic viral hepatitis B with delta-agent
• B18.1 Chronic viral hepatitis B without delta-agent (this code)
• B18.2 Chronic viral hepatitis C
• B18.8 Other chronic viral hepatitis
• B18.9 Chronic viral hepatitis, unspecified