Abscess of anal and rectal regions (K61) ICD-10-CM
The K61 code range covers abscess of anal and rectal regions with 9 ICD-10-CM diagnosis codes. 7 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- abscess of anal and rectal regions
- cellulitis of anal and rectal regions
Codes in the K61 Range 9 codes · 7 billable
About the K61 Code Range
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.
Questions About This Page
How many billable codes are in the K61 range?
Of the 9 codes in this range, 7 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the K61 range classify?
The range classifies abscess of anal and rectal regions. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
