K66.9Billable

Disorder of peritoneum, unspecified

Chapter
11. Diseases of the digestive system
Category
K66
Effective date
October 1, 2026

Related codes in category K66

K66Other disorders of peritoneumK66.0Peritoneal adhesions (postprocedural) (postinfection)YesK66.1HemoperitoneumYesK66.8Other specified disorders of peritoneumYes

Frequently asked questions

What is ICD-10 code K66.9?

K66.9 is an ICD-10-CM diagnosis code for Disorder of peritoneum, unspecified.

Is K66.9 a billable code?

Yes. K66.9 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is K66.9 in?

K66.9 falls under Chapter 11: Diseases of the digestive system.

When did K66.9 become effective?

K66.9 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to K66.9?

K66.9 belongs to category K66, 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.