ICD-10-CM 2027
ICD-10 code for Perihepatitis
From the official ICD-10-CM alphabetic index entry “Perihepatitis”. Page updated September 29, 2026.
About coding Perihepatitis
The ICD-10-CM code for Perihepatitis is K65.8 (Other peritonitis).
Within K65, choose K65.8 (Other peritonitis) only when documentation doesn't support a more specific option: generalized (acute) peritonitis (K65.0), peritoneal abscess (K65.1), spontaneous bacterial peritonitis (K65.2), Choleperitonitis (K65.3), sclerosing mesenteritis (K65.4) and unspecified (K65.9).
Use an additional code (B95-B97), to identify infectious agent, if known.
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.
Common questions about Perihepatitis ICD-10 codes
What is the ICD-10 code for Perihepatitis?
- K65.8 — Other peritonitis.
Is K65.8 billable?
- Yes. K65.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K65.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K65.8 as a principal diagnosis.
Is K65.8 a CC or MCC?
- K65.8 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.