ICD-10 Code K60.3 – Anal fistula (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K60.3 – Anal fistula
What it is
K60.3 identifies an abnormal tunnel connecting the anal canal or rectum to the skin near the anus. Use it when the record clearly documents an anal fistula.
Clinical signs
Common findings include persistent perianal drainage, recurrent local infection, pain, swelling, or irritation. Clinical features vary; refer to documentation.
When to use this code
Use K60.3 when the provider diagnoses an anal fistula, including chronic draining tracts around the anus. It may also fit postoperative or recurrent fistula documentation if the note still confirms the diagnosis. Check documentation for the exact anatomic site and any associated abscess or Crohn-related disease.
Do not use for
Do not use this code for hemorrhoids, anal fissure, or simple perianal abscess without a documented fistula. If the chart only mentions a suspected tract, check documentation.
Coding tip
Code the fistula only when the provider states it; if the record is unclear, query for confirmation of the diagnosis and site.