Other ischiorectal abscess

This code represents an abscess located in the ischiorectal fossa, a space adjacent to the anus and rectum, that is not otherwise specified as a horseshoe or other specific type. It signifies a collection of pus within this anatomical region, typically resulting from an infection of the anal glands.

Use this code when documentation clearly identifies an ischiorectal abscess that doesn't fit the criteria for a horseshoe abscess or other more specific classifications. Supporting documentation would include physician notes detailing the location of the abscess as the ischiorectal fossa and ruling out other specific types.

• Ensure the documentation specifies "ischiorectal" and not just a general perianal or anorectal abscess.
• Differentiate from K61.1 (Rectal abscess) and K61.2 (Anorectal abscess) which are less specific.
• Consider an additional code for any underlying cause, such as Crohn's disease, if documented.