ICD-10-CM 2027
ICD-10 code for pilonidal sinus
From the official ICD-10-CM alphabetic index entry “Sinus › pilonidal (infected) (rectum)”. Page updated September 29, 2026.
About coding pilonidal sinus
The ICD-10-CM code for pilonidal sinus is L05.92 (Pilonidal sinus without abscess). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on L05.92.
Within L05.9, choose L05.92 (sinus without abscess) only when documentation doesn't support a more specific option: cyst without abscess (L05.91).
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 602 (Cellulitis with MCC, relative weight 1.4273) and DRG 603 (Cellulitis without MCC, relative weight 0.8635), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific pilonidal sinus codes (official index)
- with abscess L05.02 — Pilonidal sinus with abscess
Common questions about pilonidal sinus ICD-10 codes
What is the ICD-10 code for pilonidal sinus?
- L05.92 — Pilonidal sinus without abscess. More specific codes apply when the documentation supports them: L05.02.
Is L05.92 billable?
- Yes. L05.92 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L05.92 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L05.92 as a principal diagnosis.
Is L05.92 a CC or MCC?
- No. L05.92 is neither a CC nor an MCC under MS-DRG v44.0.