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ICD-10-CM 2027 diagnosis code

K60.31Anal fistula, simple

Not billable — use a more specific code

K60.31 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

Code last changed in FY2025 (effective October 1, 2024). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About K60.31

K60.31 is the ICD-10-CM diagnosis code for anal fistula, simple. It belongs to category K60 (fissure and fistula of anal and rectal regions), 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 4 subcodes must be used instead.

Within K60.3 (anal fistula), K60.31 is specifically for anal fistula, simple. Related codes cover unspecified (K60.30) and complex (K60.32).

To report this condition, pick the subcode that matches the documentation: K60.311 (initial), K60.312 (persistent), K60.313 (recurrent) and K60.319 (unspecified).

It was added in FY2025, effective October 1, 2024.

Specific codes under K60.31

Coding notes

Applicable toConditions and synonyms classified to this code
  • Low intersphincteric anal fistula
  • Superficial anal fistula

Notes that apply from higher levels

Instructions written at a parent level also apply to K60.31.

› From K60.3 Anal fistula
Excludes1
  • congenital fistula (Q43.6)
Code first
  • , if applicable:
  • Crohn's disease (K50.-)
  • ulcerative colitis (K51.-)
› From K60 Fissure and fistula of anal and rectal regions
Excludes2
  • abscess or cellulitis of anal and rectal regions (K61.-)
  • anal sphincter tear (healed) (nontraumatic) (old) (K62.81)

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

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to K60.31.

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
  • FY2025 (effective 10/1/2024): Added
  • No changes since FY2025.

Common questions about K60.31

Is K60.31 billable?

No. K60.31 is a header code. Report one of its more specific subcodes instead.