B25.1 Cytomegaloviral hepatitis

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

Applies from B25 Cytomegaloviral disease

Excludes1 (never code together)

• congenital cytomegalovirus infection (P35.1)
• cytomegaloviral mononucleosis (B27.1-)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 6 — Opportunistic Infections
• CMS-HCC V22: HCC 6 — Opportunistic Infections
• RxHCC V08: HCC 5 — Opportunistic Infections
• ESRD V24: HCC 6

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 078.5 Cytomegaloviral disease (approximate)
• 573.1 Hepatitis in viral diseases classified elsewhere (approximate)

Code annotations containing back-references to B25.1

Back-references to B25.1

• Type 1 Excludes: K77 Liver disorders in diseases classified elsewhere ("cytomegaloviral hepatitis (B25.1)")

Back-references to B25

• Type 2 Excludes: B10 Other human herpesviruses ("human herpesvirus 5 (B25.-)")
• Code First: H67 Otitis media in diseases classified elsewhere ("viral disease NEC (B00-B34)")
• Use Additional: T86.43 Liver transplant infection ("Cytomegalovirus (CMV) infection (B25.-)")

Diagnosis Index entries for B25.1

• Hepatitis › cytomegaloviral
• Hepatitis › viral, virus › cytomegalic inclusion

Nearby codes

• B25 Cytomegaloviral disease
• B25.0 Cytomegaloviral pneumonitis
• B25.1 Cytomegaloviral hepatitis (this code)
• B25.2 Cytomegaloviral pancreatitis
• B25.8 Other cytomegaloviral diseases
• B25.9 Cytomegaloviral disease, unspecified