ICD-10-CM 2027
ICD-10 code for horseshoe abscess
From the official ICD-10-CM alphabetic index entry “Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) › horseshoe”. Page updated September 29, 2026.
About coding horseshoe abscess
The ICD-10-CM code for horseshoe abscess is K61.31 (Horseshoe abscess).
Within K61.3 (ischiorectal abscess), K61.31 is specifically for horseshoe abscess. Related codes cover other ischiorectal abscess (K61.39).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 393 (Other Digestive System Diagnoses with MCC, relative weight 1.5881), DRG 394 (Other Digestive System Diagnoses with CC, relative weight 0.9228), DRG 395 (Other Digestive System Diagnoses without CC/MCC, relative weight 0.6382), DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 06 (Diseases and Disorders of the Digestive System) and MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about horseshoe abscess ICD-10 codes
What is the ICD-10 code for horseshoe abscess?
- K61.31 — Horseshoe abscess.
Is K61.31 billable?
- Yes. K61.31 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K61.31 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K61.31 as a principal diagnosis.
Is K61.31 a CC or MCC?
- No. K61.31 is neither a CC nor an MCC under MS-DRG v44.0.