ICD-10-CM 2027
ICD-10 code for fecal fistula
From the official ICD-10-CM alphabetic index entry “Fistula (cutaneous) › fecal”. Page updated September 29, 2026.
About coding fecal fistula
The ICD-10-CM code for fecal fistula is K63.2 (Fistula of intestine). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on K63.2.
Within K63 (other diseases of intestine), K63.2 is specifically for fistula of intestine. Related codes cover abscess of intestine (K63.0), perforation of intestine (nontraumatic) (K63.1), ulcer of intestine (K63.3), Enteroptosis (K63.4), polyp of colon (K63.5), other specified diseases of intestine (K63.8) and disease of intestine, unspecified (K63.9).
Don't report K63.2 together with the conditions in its Excludes1 note: fistula of duodenum (K31.6), fistula of intestine with Crohn's disease (K50.013, K50.113, K50.813, K50.913,) and fistula of intestine with ulcerative colitis (K51.013, K51.213, K51.313, K51.413, K51.513, K51.813, K51.913).
The conditions in its Excludes2 note aren't part of K63.2, but may be coded alongside it if the patient has both: fistula of anal and rectal regions (K60.-), fistula of appendix (K38.3), intestinal-genital fistula, female (N82.2-N82.4) and vesicointestinal fistula (N32.1).
More specific fecal fistula codes (official index)
- congenital Q43.6 — Congenital fistula of rectum and anus
Don't confuse with (Excludes1 for K63.2)
Common questions about fecal fistula ICD-10 codes
What is the ICD-10 code for fecal fistula?
- K63.2 — Fistula of intestine. More specific codes apply when the documentation supports them: Q43.6.
What is the ICD-10 code for congenital fecal fistula?
- Q43.6 — Congenital fistula of rectum and anus.
Is K63.2 billable?
- Yes. K63.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K63.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K63.2 as a principal diagnosis.
Is K63.2 a CC or MCC?
- K63.2 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.