ICD-10 Code K60.322 – Anal fistula, complex, persistent (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K60.322 – Anal fistula, complex, persistent
What it is
K60.322 identifies a complex anal fistula that has persisted over time. It is used when the fistula is not simple and continues despite prior care or observation.
Clinical signs
Typical findings include a chronic draining opening near the anus, recurrent abscesses, pain, or local irritation. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly documents a complex anal fistula that is persistent, chronic, or longstanding. The note should support that the condition is not an acute abscess alone and not a simple fistula. If the provider describes complexity, persistence, or prior failed management, this code may fit.
Do not use for
Do not use it for a perianal abscess without a documented fistula. Also avoid it when the chart only says “anal fistula” and does not specify complex or persistent; check documentation.
Coding tip
Code the documented complexity and chronicity exactly as stated, and query if the record does not clearly support both terms.