2026 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 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L74.510 is a billable ICD-10-CM diagnosis code for primary focal hyperhidrosis, axilla. 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 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

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.

    • Hyperhidrosis, hyperidrosis
      • focal
        • primary
          • axilla
    • Hyperhidrosis, hyperidrosis
      • localized
        • primary
          • axilla

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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About L74.510Overview

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, 2025 through September 30, 2026.

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 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 L74.510?

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.

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.