Abscess of anal and rectal regions (K61)

The ICD-10 code K61 and its subcodes are used to classify different types of abscesses in the anal and rectal regions. These codes help specify the exact location and nature of infections or pus-filled swellings around the anus and rectum.

The ICD-10 code for abscess of anal and rectal regions (K61) covers several specific conditions. For instance, K61.0 refers to an anal abscess, which includes terms like anal furunculosis and perianal cellulitis. K61.1 is used for a rectal abscess, sometimes called anorectal abscess or perirectal cellulitis. The broader K61.2 code covers anorectal abscesses, capturing infections in the area including anorectal fissures. More localized infections under this section include K61.3 for ischiorectal abscesses, with subtypes such as horseshoe abscess (K61.31). The K61.4 code identifies intrasphincteric abscesses, while K61.5 is assigned to supralevator abscesses. Common synonyms like perianal abscess, transsphincteric anal fistula, and rectal cellulitis align closely with these codes, aiding medical coders in choosing the most precise classification based on the abscess location and characteristics.