ICD-10-CM > K00-K95 > K55-K64 > K60 > K60.4 > K60.42 K60.42 Rectal fistula, complex Non-Billable/Non-Specific Applicable To Extrasphincteric rectal fistulaHigh intersphincteric rectal fistulaSuprasphincteric rectal fistulaTranssphincteric rectal fistula Code Also , if applicable:perianal abscess (K61.0)rectovaginal fistula (N82.3)stenosis of anus and rectum (K62.4) Codes K60.421Rectal fistula, complex, initialK60.422Rectal fistula, complex, persistentK60.423Rectal fistula, complex, recurrentK60.429Rectal fistula, complex, unspecified