ICD-10 Code K60.511 – Anorectal fistula, simple, initial (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K60.511 – Anorectal fistula, simple, initial
What it is
K60.511 identifies a simple anorectal fistula during the initial episode of care. It describes an abnormal tract between the anal canal or rectum and nearby skin, documented as simple rather than complex.
Clinical signs
Common findings include persistent perianal drainage, irritation, pain, or a visible external opening. Clinical features vary; refer to documentation, especially if the record notes abscess history, recurrence, or fistula complexity.
When to use this code
Use this code when the provider documents a simple anorectal fistula and the encounter is for initial management. Apply it when the note clearly supports the diagnosis and does not describe a complex, recurrent, or unspecified fistula. Check documentation if the anatomy or severity is unclear.
Do not use for
Do not use K60.511 for hemorrhoids, anal fissure, or perianal abscess without a fistula. Also avoid it when the chart does not confirm that the fistula is simple or when the encounter is not initial.
Coding tip
Verify both the fistula type and the encounter status before assigning K60.511.