ICD-10-CM 2027
ICD-10 code for Prickly heat
From the official ICD-10-CM alphabetic index entry “Heat (effects) › prickly”. Page updated September 29, 2026.
About coding Prickly heat
The ICD-10-CM code for Prickly heat is L74.0 (Miliaria rubra).
Within L74 (eccrine sweat disorders), L74.0 is specifically for miliaria rubra. Related codes cover miliaria crystallina (L74.1), miliaria profunda (L74.2), miliaria, unspecified (L74.3), Anhidrosis (L74.4), focal hyperhidrosis (L74.5), other eccrine sweat disorders (L74.8) and eccrine sweat disorder, unspecified (L74.9).
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.
Common questions about Prickly heat ICD-10 codes
What is the ICD-10 code for Prickly heat?
- L74.0 — Miliaria rubra.
Is L74.0 billable?
- Yes. L74.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L74.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L74.0 as a principal diagnosis.
Is L74.0 a CC or MCC?
- No. L74.0 is neither a CC nor an MCC under MS-DRG v44.0.