2026 ICD-10-CM Diagnosis Code L74.3Miliaria, unspecified
ICD-10-CM Codes›L00–L99›L60-L75›L74
- Billable — Valid for Submission
- Not Chronic
L74.3 is a billable ICD-10-CM diagnosis code for miliaria, unspecified. 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 infantile miliaria. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified skin disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Infantile miliaria
- Miliaria
- Miliaria pustulosa
- Miliaria vesiculosa
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Miliaria - L74.3
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Miliaria
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Fox-Fordyce Disease
chronic pruritic disease, usually in women, characterized by small follicular papular eruptions in apocrine glands areas. it is caused by obstruction and rupture of intraepidermal apocrine ducts.Miliaria
a syndrome of cutaneous changes associated with sweat retention and extravasation of sweat at different levels in the skin. miliaria rubra, or prickly heat, results from apocrine duct obstruction. the sweat then seeps into the epidermis, producing pruritic erythematous papulovesicles. (from dorland, 27th ed)Apocrine Glands
large, branched, specialized sweat glands that empty into the upper portion of a hair follicle instead of directly onto the skin.
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.
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Convert L74.3 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About L74.3Overview
Is L74.3 (Eccrine sweat disorders) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report miliaria, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does L74.3 group to?
When miliaria, unspecified 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 L74.3?
Under the General Equivalence Mappings, miliaria, unspecified 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.
