K60.3Anal fistula

K60.3 is the ICD-10-CM diagnosis code for anal fistula. It belongs to category K60 (fissure and fistula of anal and rectal regions), block K55-K64 (other diseases of intestines) and chapter 11 (diseases of the digestive system). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within K60 (fissure and fistula of anal and rectal regions), K60.3 is specifically for anal fistula. Related codes cover acute anal fissure (K60.0), chronic anal fissure (K60.1), anal fissure, unspecified (K60.2), rectal fistula (K60.4) and Anorectal fistula (K60.5).

To report this condition, pick the subcode that matches the documentation: K60.30 (unspecified), K60.31 (simple) and K60.32 (complex).

Don't report K60.3 together with the conditions in its Excludes1 note: congenital fistula (Q43.6).

Code first , if applicable: Crohn's disease (K50.-) and ulcerative colitis (K51.-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2025 (expanded into subcodes).

Before ICD-10, this condition was coded in ICD-9-CM as 565.1 (anal fistula).