ICD-10-CM 2027
ICD-10 code for Infectional hemoperitoneum
From the official ICD-10-CM alphabetic index entry “Hemoperitoneum › infectional”. Page updated September 29, 2026.
About coding Infectional hemoperitoneum
The ICD-10-CM code for Infectional hemoperitoneum is K65.9 (Peritonitis, unspecified).
Within K65, choose K65.9 (unspecified) 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 other peritonitis (K65.8).
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 Infectional hemoperitoneum ICD-10 codes
What is the ICD-10 code for Infectional hemoperitoneum?
- K65.9 — Peritonitis, unspecified.
Is K65.9 billable?
- Yes. K65.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K65.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K65.9 as a principal diagnosis.
Is K65.9 a CC or MCC?
- K65.9 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.