2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Abscess of anal and rectal regions
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to K61: its own notes plus those printed at Chapter 11. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

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

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 11 (K00-K95) Diseases of the digestive system applies to 863 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name K61, its category, or a range that includes it.

Excludes2 5

These codes carry an Excludes2 note naming K61: its condition is not part of those codes, and both may be reported when the patient has both.

  • K60 Fissure and fistula of anal and rectal regions
    abscess or cellulitis of anal and rectal regions (K61.-)
  • K63.0 Abscess of intestine
    abscess of anal and rectal regions (K61.-)
  • L02 Cutaneous abscess, furuncle and carbuncle
    abscess of anus and rectal regions (K61.-)
  • L03 Cellulitis and acute lymphangitis
    cellulitis of anal and rectal region (K61.-)
  • L03.31 Cellulitis of trunk
    cellulitis of anal and rectal regions (K61.-)

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About K61Overview

What is the ICD-10 code for abscess of anal and rectal regions?

K61 is the ICD-10-CM category for abscess of anal and rectal regions, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.