ICD-10-CM 2027
ICD-10 code for HAA carrier of
From the official ICD-10-CM alphabetic index entry “Carrier (suspected) of › HAA (hepatitis Australian-antigen)”. Page updated September 29, 2026.
About coding HAA carrier of
The ICD-10-CM code for HAA carrier of is B18.8 (Other chronic viral hepatitis).
Within B18, choose B18.8 (Other chronic viral hepatitis) only when documentation doesn't support a more specific option: B with delta-agent (B18.0), B without delta-agent (B18.1), C (B18.2) and unspecified (B18.9).
Use an additional code, if applicable, for ascites (R18.8).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
Common questions about HAA carrier of ICD-10 codes
What is the ICD-10 code for HAA carrier of?
- B18.8 — Other chronic viral hepatitis.
Is B18.8 billable?
- Yes. B18.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B18.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B18.8 as a principal diagnosis.
Is B18.8 a CC or MCC?
- B18.8 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.