ICD-10-CM 2027
ICD-10 code for anus cellulitis
From the official ICD-10-CM alphabetic index entry “Cellulitis (diffuse) (phlegmonous) (septic) (suppurative) › anus”. Page updated September 29, 2026.
About coding anus cellulitis
The ICD-10-CM code for anus cellulitis is K61.0 (Anal abscess).
Within K61 (abscess of anal and rectal regions), K61.0 is specifically for anal abscess. Related codes cover rectal abscess (K61.1), Anorectal abscess (K61.2), ischiorectal abscess (K61.3), Intrasphincteric abscess (K61.4) and Supralevator abscess (K61.5).
The conditions in its Excludes2 note aren't part of K61.0, but may be coded alongside it if the patient has both: intrasphincteric abscess (K61.4).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
Common questions about anus cellulitis ICD-10 codes
What is the ICD-10 code for anus cellulitis?
- K61.0 — Anal abscess.
Is K61.0 billable?
- Yes. K61.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K61.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K61.0 as a principal diagnosis.
Is K61.0 a CC or MCC?
- K61.0 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.