ICD-10-CM 2027
ICD-10 code for Circinata pityriasis
From the official ICD-10-CM alphabetic index entry “Pityriasis (capitis) › circinata (et maculata)”. Page updated September 29, 2026.
About coding Circinata pityriasis
The ICD-10-CM code for Circinata pityriasis is L42 (Pityriasis rosea).
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 606 (Minor Skin Disorders with MCC, relative weight 1.5728) and DRG 607 (Minor Skin Disorders without MCC, relative weight 0.8772), 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.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Common questions about Circinata pityriasis ICD-10 codes
What is the ICD-10 code for Circinata pityriasis?
- L42 — Pityriasis rosea.
Is L42 billable?
- Yes. L42 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L42 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L42 as a principal diagnosis.
Is L42 a CC or MCC?
- No. L42 is neither a CC nor an MCC under MS-DRG v44.0.