2026 ICD-10-CM Diagnosis Code K61Abscess of anal and rectal regions

ICD-10-CM Codes›K00–K95›K55-K64›K61

ICD-10-CM K61
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K61 is a non-billable ICD-10-CM category code for abscess of anal and rectal regions, so it cannot be submitted on claims. Use a more specific code from this category instead, such as K61.0, K61.1, K61.2, and K61.31.

Code Identity

ICD-10-CM Code
K61
Billable Status
No — Non-Billable Category
Code Describes
Abscess of anal and rectal regions
Chapter
K55-K64
Other diseases of intestines

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK55-K64Other diseases of intestines
CategoryK61Abscess of anal and rectal regions
This CodeK61Abscess of anal and rectal regions

Specific Coding for Abscess of anal and rectal regionsOverview

Non-specific codes like K61 require more characters. Use one of these billable codes instead:

  • Use K61.0 for Anal abscess

  • Use K61.1 for Rectal abscess

  • Use K61.2 for Anorectal abscess

  • K61.3 for Ischiorectal abscess

  • Use K61.31 for Horseshoe abscess

  • Use K61.39 for Other ischiorectal abscess

  • Use K61.4 for Intrasphincteric abscess

  • Use K61.5 for Supralevator abscess

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Includes

  • abscess of anal and rectal regions
  • cellulitis of anal and rectal regions

Patient EducationClinical

Abscess

An abscess is a pocket of pus. You can get an abscess almost anywhere in your body. When an area of your body becomes infected, your body's immune system tries to fight the infection. White blood cells go to the infected area, collect within the damaged tissue, and cause inflammation. During this process, pus forms.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About K61Overview

Is K61 (Abscess of anal and rectal regions) a billable code?

No. This is a category header that groups the codes for abscess of anal and rectal regions, and headers cannot be submitted on claims. Claims for abscess of anal and rectal regions need a more specific code from this category, such as K61.0, K61.1, and K61.2.