2027 ICD-10-CM Diagnosis Code L74.510Primary focal hyperhidrosis, axilla

ICD-10-CM Codes›L00–L99›L60-L75›L74

ICD-10-CM L74.510
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

L74.510 is a billable ICD-10-CM diagnosis code for primary focal hyperhidrosis, axilla. 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 hyperhidrosis of axilla. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified skin disorders.

Code Identity

ICD-10-CM Code
L74.510
Billable Status
Yes — Valid for Submission
Code Describes
Primary focal hyperhidrosis, axilla
Short Description
Primary focal hyperhidrosis, axilla
Same as the full description in the CMS dataset.
Parent Code
L74.51
Primary focal hyperhidrosis

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL60-L75Disorders of skin appendages
CategoryL74Eccrine sweat disorders
This CodeL74.510Primary focal hyperhidrosis, axilla

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Hyperhidrosis of axilla
  • Primary focal hyperhidrosis
  • Primary focal hyperhidrosis of axilla
  • Sweaty armpits

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to L74.510: 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 L74.510, its category, or a range that includes it.

Excludes1 2

These codes carry an Excludes1 note naming L74.510: they are not reported together with it, unless the two conditions are unrelated.

  • R61 Generalized hyperhidrosis
    focal (primary) (secondary) hyperhidrosis (L74.5-) names L74.5-, which includes this code
  • R61 Generalized hyperhidrosis
    localized (primary) (secondary) hyperhidrosis (L74.5-) names L74.5-, which includes this code

Excludes2 1

These codes carry an Excludes2 note naming L74.510: 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

Patient EducationClinical

Sweat

Sweat is a clear, salty liquid produced by glands in your skin. Sweating is how your body cools itself. You sweat mainly under your arms and on your feet and palms. When sweat mixes with bacteria on your skin, it can cause a smell. Bathing regularly and using antiperspirants or deodorants can help control the odor.

Read the full article at MedlinePlus

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

Convert L74.510 to ICD-9-CMHistory

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

ICD-9-CM
705.21 Primary focal hyprhidros
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 L74.510Overview

What is the ICD-10 code for primary focal hyperhidrosis, axilla?

The ICD-10-CM code for primary focal hyperhidrosis, axilla is L74.510 (sometimes written as L74510). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is L74.510 (Primary focal hyperhidrosis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report primary focal hyperhidrosis, axilla on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does L74.510 group to?

When primary focal hyperhidrosis, axilla 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 L74.510 be reported with a code from Q84?

Not as a rule. The Excludes1 note at block L60-L75, which applies to L74.510, 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 L74.510?

Under the General Equivalence Mappings, primary focal hyperhidrosis, axilla converts to ICD-9-CM 705.21 (primary focal hyprhidros). The mapping is approximate, so confirm the match fits the documentation.