2026 ICD-10-CM Diagnosis Code L74.0Miliaria rubra

ICD-10-CM Codes›L00–L99›L60-L75›L74

ICD-10-CM L74.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L74.0 is a billable ICD-10-CM diagnosis code for miliaria rubra. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 606 through 607. Coders also document this condition as heat-induced dermatosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified skin disorders.

Code Identity

ICD-10-CM Code
L74.0
Billable Status
Yes — Valid for Submission
Code Describes
Miliaria rubra
Short Description
Miliaria rubra
Same as the full description in the CMS dataset.
Parent Code
L74
Eccrine sweat disorders

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL60-L75Disorders of skin appendages
CategoryL74Eccrine sweat disorders
This CodeL74.0Miliaria rubra

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Heat-induced dermatosis
  • Miliaria rubra, infantile
  • Prickly heat

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Heat(effects)
      • prickly
    • Heat(effects)
      • rash
    • Miliaria
      • rubra
    • Prickly heat
    • Rash(toxic)
      • heat
    • Syndrome
      • sweat retention

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR SKN007
Other specified and unspecified skin disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Rashes

A rash is an area of irritated or swollen skin. Many rashes are itchy, red, painful, and irritated. Some rashes can also lead to blisters or patches of raw skin. Rashes are a symptom of many different medical problems. Other causes include irritating substances and allergies. Certain genes can make people more likely to get rashes.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert L74.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
705.1 Prickly heat
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About L74.0Overview

Is L74.0 (Eccrine sweat disorders) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report miliaria rubra on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does L74.0 group to?

When miliaria rubra is the principal diagnosis on an inpatient stay, it groups to MS-DRG 606, 607, with relative weights from 0.9064 to 1.5132 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of L74.0?

Under the General Equivalence Mappings, miliaria rubra converts to ICD-9-CM 705.1 (prickly heat). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.