ICD-10 Code K61 – Abscess of anal and rectal regions (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K61 – Abscess of anal and rectal regions
What it is
K61 identifies an abscess in the anal or rectal region, meaning a localized pocket of pus near the anus or rectum. Use it when the record documents a perianal, anorectal, or rectal abscess.
Clinical signs
Common findings include anal pain, swelling, redness, and tenderness, sometimes with drainage or fever. Clinical features vary; refer to documentation.
When to use this code
Use K61 when the provider diagnoses an abscess involving the anal or rectal area and does not specify a more precise site. It is appropriate for documented perianal, perirectal, or anorectal abscesses. Verify the note for the exact location and whether the condition is acute or recurrent.
Do not use for
Do not use K61 for hemorrhoids, anal fissure, or simple skin infections without abscess formation. Check documentation if the record describes a fistula, cellulitis, or another anorectal disorder instead.
Coding tip
Match the code to the provider’s exact anatomic wording, and code any documented fistula or related condition separately if instructed.