K65Header code — not billable

Peritonitis

Chapter
11. Diseases of the digestive system
Category
K65
Effective date
October 1, 2026

Related codes in category K65

K65.0Generalized (acute) peritonitisYesK65.1Peritoneal abscessYesK65.2Spontaneous bacterial peritonitisYesK65.3CholeperitonitisYesK65.4Sclerosing mesenteritisYesK65.8Other peritonitisYesK65.9Peritonitis, unspecifiedYes

Frequently asked questions

What is ICD-10 code K65?

K65 is an ICD-10-CM diagnosis code for Peritonitis.

Is K65 a billable code?

No. K65 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is K65 in?

K65 falls under Chapter 11: Diseases of the digestive system.

When did K65 become effective?

K65 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to K65?

K65 belongs to category K65, which includes 7 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.