ICD-10 Code K60.422 – Rectal fistula, complex, persistent (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K60.422 – Rectal fistula, complex, persistent
What it is
This code identifies a rectal fistula that is both complex and persistent. It is used when the abnormal tract remains ongoing and is not a simple, straightforward fistula.
Clinical signs
Typical findings include chronic drainage, local irritation, pain, and recurrent infection near the rectum. Clinical features vary; refer to documentation.
When to use this code
Use K60.422 when the provider documents a rectal fistula as complex and persistent, with no ambiguity about the diagnosis. Apply it for ongoing fistulous disease that requires continued evaluation or management. If the record does not clearly state both complexity and persistence, check documentation.
Do not use for
Do not use this code for a simple or acute fistula, or when the tract is not documented as rectal. Do not assign it if the chart only mentions an abscess, fissure, or suspected fistula.
Coding tip
Match the code only to explicit provider wording; if “complex” or “persistent” is missing, query the record before coding.