ICD-10 Code K60.5 – Anorectal fistula (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K60.5 – Anorectal fistula
What it is
K60.5 identifies an abnormal tract between the anal canal or rectum and nearby skin or tissue. Use it when documentation states an anorectal fistula, including fistula-in-ano.
Clinical signs
Typical findings include persistent drainage, recurrent perianal irritation, and a visible or palpable external opening. Clinical features vary; refer to documentation.
When to use this code
Use K60.5 when the provider documents an anorectal fistula as the confirmed diagnosis, whether current or chronic. It also fits follow-up visits for the condition when no more specific complication or postoperative status is reported.
If the note describes fistula anatomy in the anorectal region without further detail, this code is generally appropriate. Check documentation for any associated abscess, inflammatory bowel disease, or postoperative cause that may require additional coding.
Do not use for
Do not assign K60.5 for anal fissure, hemorrhoids, or rectal abscess without a documented fistula. Do not use it when the record only says “perianal drainage” and the fistula is not confirmed.
Coding tip
Code the fistula only when the provider clearly documents the diagnosis; if anatomy or cause is unclear, check documentation.