K65.0: Generalized (acute) peritonitis
K65.0 is the billable ICD-10-CM diagnosis code for Generalized (acute) peritonitis. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code K65.0?
K65.0 is the ICD-10-CM diagnosis code for Generalized (acute) peritonitis. It belongs to category K65 (Peritonitis).
Is K65.0 a billable code?
Yes. K65.0 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does K65.0 belong to?
K65.0 is part of ICD-10-CM category K65 — Peritonitis, which has 14 billable codes.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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