ICD-10 Code K61.4 – Intrasphincteric abscess (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K61.4 – Intrasphincteric abscess
What it is
K61.4 identifies an abscess located within the anal sphincter muscle. Use it for a localized anorectal infection documented as intrasphincteric, not for a simple perianal abscess.
Clinical signs
Typical findings include anal pain, swelling, tenderness, and possible drainage. Clinical features vary; refer to documentation, especially when the record specifies the abscess is within the sphincter.
When to use this code
Use K61.4 when the provider documents an intrasphincteric abscess or clearly describes an abscess confined to the anal sphincter. It is also appropriate when imaging, exam, or operative notes confirm that location. Check documentation if the note only says anorectal or perianal abscess.
Do not use for
Do not assign this code for a nonspecific perianal abscess, fistula, or hemorrhoids. If the location is unclear or another anorectal abscess type is documented, check documentation.
Coding tip
Code the exact abscess location from the operative or specialist note; anatomy wording matters for K61.4.