ICD-10 Code K60.522 – Anorectal fistula, complex, persistent (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K60.522 – Anorectal fistula, complex, persistent
What it is
K60.522 identifies a complex anorectal fistula that has not resolved. It describes an abnormal tract involving the anorectal region, with persistent disease documented by the clinician.
Clinical signs
Common findings include ongoing drainage, recurrent perianal irritation, pain, or a history of repeated fistula recurrence. Clinical features vary; refer to documentation.
When to use this code
Use K60.522 when the record clearly states an anorectal fistula is complex and persistent. The note should support chronicity, recurrence, or failure to close, not just a simple or acute fistula.
If the provider documents a fistula without complexity or persistence, choose the more specific available code instead. Check documentation when the anatomy or severity is unclear.
Do not use for
Do not use this code for a simple anorectal fistula, a healed condition, or a nonspecific anal symptom. Check documentation if the note only says “perianal abscess” or “drainage” without a fistula diagnosis.
Coding tip
Code K60.522 only when both “complex” and “persistent” are documented together.