K81Header code — not billable

Cholecystitis

Chapter
11. Diseases of the digestive system
Category
K81
Effective date
October 1, 2026

Related codes in category K81

K81.0Acute cholecystitisYesK81.1Chronic cholecystitisYesK81.2Acute cholecystitis with chronic cholecystitisYesK81.9Cholecystitis, unspecifiedYes

Frequently asked questions

What is ICD-10 code K81?

K81 is an ICD-10-CM diagnosis code for Cholecystitis.

Is K81 a billable code?

No. K81 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 K81 in?

K81 falls under Chapter 11: Diseases of the digestive system.

When did K81 become effective?

K81 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to K81?

K81 belongs to category K81, which includes 4 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.