K66.8 ICD-10-CA code: Other specified disorders of peritoneum
K66.8 is the ICD-10-CA code for “Other specified disorders of peritoneum” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
K66.8Other specified disorders of peritoneum
ICD-10-CA · Canada · Also written K668
Index terms
Entries in CIHI’s alphabetical index that lead to K66.8. Searching the index by the condition the note names is how coders reach this code.
- Granuloma, abdomen
- Granuloma, peritoneum
- Pneumatosis, peritonei
- Frozen, pelvis (female), male
- Rupture, ruptured, mesentery (nontraumatic)
- Disease, diseased, peritoneum, specified NEC
- Cyst (colloid) (mucous) (retention) (simple), peritoneum
- Cyst (colloid) (mucous) (retention) (simple), retroperitoneal
- Cyst (colloid) (mucous) (retention) (simple), omentum (lesser)
- Cyst (colloid) (mucous) (retention) (simple), mesentery, mesenteric
Notes for K66.8
As CIHI prints them, with any note K66.8 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- Ascites (R18)From K66 Other disorders of peritoneum
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 11: Diseases of the digestive system (K00-K93)
Where K66.8 sits
- 1ChapterChapter 11: Diseases of the digestive system (K00-K93)
- 2Block K65-K67Diseases of peritoneum
- 3Category K66Other disorders of peritoneum
- 4Valid code K66.8Other specified disorders of peritoneum
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code K66.8 mean?
K66.8 is the ICD-10-CA code for “Other specified disorders of peritoneum” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is K66.8 in ICD-10-CA?
K66.8 sits under K66 Other disorders of peritoneum, within K65-K67 Diseases of peritoneum, within Chapter 11: Diseases of the digestive system (K00-K93).
What coding notes apply to K66.8?
ICD-10-CA lists Excludes notes for K66.8, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.