ICD-10-CM 2027
ICD-10 code for external ear impetigo
From the official ICD-10-CM alphabetic index entry “Impetigo (any organism) (any site) (circinate) (contagiosa) (simplex) (vulgaris) › external ear”. Page updated September 29, 2026.
About coding external ear impetigo
The ICD-10-CM code for external ear impetigo is L01.00 (Impetigo, unspecified).
Within L01.0, choose L01.00 (unspecified) only when documentation doesn't support a more specific option: Non-bullous impetigo (L01.01), Bockhart's impetigo (L01.02), bullous impetigo (L01.03) and other impetigo (L01.09).
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.
Common questions about external ear impetigo ICD-10 codes
What is the ICD-10 code for external ear impetigo?
- L01.00 — Impetigo, unspecified.
Is L01.00 billable?
- Yes. L01.00 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L01.00 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L01.00 as a principal diagnosis.
Is L01.00 a CC or MCC?
- No. L01.00 is neither a CC nor an MCC under MS-DRG v44.0.