ICD-10 Code K60.423 – Rectal fistula, complex, recurrent (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K60.423 – Rectal fistula, complex, recurrent
What it is
This code identifies a recurrent rectal fistula that is described as complex. It signals an abnormal tract involving the rectal area that has returned after prior treatment or healing.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings include persistent or recurring drainage, local irritation, pain, or evidence of a fistulous opening on examination.
When to use this code
Use this code when the provider documents a rectal fistula as both complex and recurrent. It is appropriate when prior episodes, previous repair, or repeated drainage are clearly stated in the record.
Do not infer recurrence from history alone unless the documentation supports it. If the note does not specify complexity or recurrence, check documentation before assigning K60.423.
Do not use for
Do not use this code for a simple or first-time rectal fistula. Also avoid it when the record describes a different anorectal condition or when recurrence is not documented.
Coding tip
Code only what the provider explicitly documents: rectal location, complexity, and recurrence.