ICD-10-CM > K00-K95 > K55-K64 > K60 > K60.4 > K60.41 K60.41 Rectal fistula, simple Non-Billable/Non-Specific Applicable To Low intersphincteric rectal fistulaSuperficial rectal fistula Codes K60.411Rectal fistula, simple, initialK60.412Rectal fistula, simple, persistentK60.413Rectal fistula, simple, recurrentK60.419Rectal fistula, simple, unspecified