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ICD-10-CM 2027 diagnosis code

K61Abscess of anal and rectal regions

Not billable — use a more specific code

K61 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About K61

K61 is the ICD-10-CM diagnosis code for abscess of anal and rectal regions. It belongs to block K55-K64 (other diseases of intestines) and chapter 11 (diseases of the digestive system). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: K61.0 (abscess), K61.1 (abscess), K61.2 (abscess), K61.3 (abscess), K61.4 (abscess) and K61.5 (abscess).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under K61

Coding notes

IncludesFurther defines the content of the category
  • abscess of anal and rectal regions
  • cellulitis of anal and rectal regions

Notes that apply from higher levels

Instructions written at a parent level also apply to K61.

Broader instructions also apply from Chapter 11: Diseases of the digestive system.

Codes whose notes reference K61

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about K61

Is K61 billable?

No. K61 is a header code. Report one of its more specific subcodes instead.