2027 ICD-10-CM Diagnosis Code L74.3Miliaria, unspecified

ICD-10-CM Codes›L00–L99›L60-L75›L74

ICD-10-CM L74.3
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

L74.3 is a billable ICD-10-CM diagnosis code for miliaria, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) 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

ICD-10-CM Code
L74.3
Billable Status
Yes — Valid for Submission
Code Describes
Miliaria, unspecified
Short Description
Miliaria, unspecified
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 CodeL74.3Miliaria, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Infantile miliaria
  • Miliaria
  • Miliaria pustulosa
  • Miliaria vesiculosa

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to L74.3: its own notes plus those printed at L74, block L60-L75, and Chapter 12. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block L60-L75 Disorders of skin appendages applies to 85 codes
  • congenital malformations of integument (Q84.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From L74 Eccrine sweat disorders applies to 13 codes
  • generalized hyperhidrosis (R61)
From Chapter 12 (L00-L99) Diseases of the skin and subcutaneous tissue applies to 1,001 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • lipomelanotic reticulosis (I89.8)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • viral warts (B07.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name L74.3, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming L74.3: its condition is not part of those codes, and both may be reported when the patient has both.

  • T67 Effects of heat and light
    sweat disorder due to heat (L74-L75) names L74-L75, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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

Clinical InformationClinical

  • 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)

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 L74.3 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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About L74.3Overview

What is the ICD-10 code for miliaria, unspecified?

The ICD-10-CM code for miliaria, unspecified is L74.3 (sometimes written as L743). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

What MS-DRG does L74.3 group to?

When miliaria, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 607, 606, with relative weights from 0.8772 to 1.5721 depending on complications. Higher weights mean higher Medicare reimbursement.

Can L74.3 be reported with a code from Q84?

Not as a rule. The Excludes1 note at block L60-L75, which applies to L74.3, lists "congenital malformations of integument (Q84.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

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.