2026 ICD-10-CM Diagnosis Code L74.4Anhidrosis

ICD-10-CM Codes›L00–L99›L60-L75›L74

ICD-10-CM L74.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L74.4 is a billable ICD-10-CM diagnosis code for anhidrosis. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified skin disorders.

Code Identity

ICD-10-CM Code
L74.4
Billable Status
Yes — Valid for Submission
Code Describes
Anhidrosis
Short Description
Anhidrosis
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 CodeL74.4Anhidrosis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Absence of sweating
  • Alacrima
  • Alopecia, onychodysplasia, hypohidrosis, deafness ectodermal dysplasia
  • Anhidrosis
  • Chronic idiopathic anhidrosis
  • Congenital anomaly of lacrimal gland
  • HELIX syndrome
  • Hereditary insensitivity to pain with anhidrosis
  • Hypohidrosis
  • Hypohidrosis co-occurrent and due to disorder of sympathetic nervous system
  • Hypohidrosis due to genetic abnormality of eccrine gland structure and function
  • Hypohidrosis due to neurological disorder
  • Hypohidrosis of unknown etiology
  • Hypohidrosis with neurolabyrinthitis
  • Hypohidrosis, enamel hypoplasia, palmoplantar keratoderma, intellectual disability syndrome
  • Hypoplastic enamel-onycholysis-hypohidrosis syndrome
  • Isolated generalized anhidrosis with normal sweat glands
  • Primary autonomic disorder with acquired anhidrosis
  • Salt-losing nephropathy
  • Segmental hypohidrosis
  • Tropical anhidrotic asthenia
  • Xerostomia

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Hypohidrosis

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.

    • Anhidrosis
    • Anidrosis
    • Hypohidrosis, hypoidrosis
    • Oligohidrosis
    • Oligohydrosis

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

  • Hypohidrosis

    abnormally diminished or absent perspiration. both generalized and segmented (reduced or absent sweating in circumscribed locations) forms of the disease are usually associated with other underlying conditions.

  • Xerostomia

    decreased salivary flow.

  • Grade 2 Hypohidrosis, CTCAE|Grade 2 Hypohidrosis

    symptomatic; limiting instrumental adl or mild/moderate impact on age-appropriate normal daily activity (pediatric)

  • Grade 3 Hypohidrosis, CTCAE|Grade 3 Hypohidrosis

    increase in body temperature; limiting self-care adl or severe impact on age-appropriate normal daily activity (pediatric)

  • Grade 4 Hypohidrosis, CTCAE|Grade 4 Hypohidrosis

    life-threatening consequences; urgent intervention indicated

  • Grade 2 Hypohidrosis, CTCAE|Grade 2 Hypohidrosis

    symptomatic; limiting instrumental adl

  • Grade 3 Hypohidrosis, CTCAE|Grade 3 Hypohidrosis

    increase in body temperature; limiting self care adl

  • Grade 4 Hypohidrosis, CTCAE|Grade 4 Hypohidrosis

    heat stroke

  • Grade 5 Hypohidrosis, CTCAE|Grade 5 Hypohidrosis

    death

  • Hypohidrosis

    reduced sweating. causes include burns, dehydration, radiation, and leprosy.

  • Hypohidrosis, CTCAE|Hypohidrosis|Hypohidrosis

    a disorder characterized by reduced sweating.

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 L74.4 to ICD-9-CMHistory

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

ICD-9-CM
705.0 Anhidrosis
Exact Match The mapping is direct, with no qualifiers.

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 L74.4Overview

Is L74.4 (Eccrine sweat disorders) a billable code?

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

What MS-DRG does L74.4 group to?

When anhidrosis 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 L74.4?

Under the General Equivalence Mappings, anhidrosis converts to ICD-9-CM 705.0 (anhidrosis). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.