2026 ICD-10-CM Diagnosis Code L74.52Secondary focal hyperhidrosis
ICD-10-CM Codes›L00–L99›L60-L75›L74
- Billable — Valid for Submission
- Not Chronic
L74.52 is a billable ICD-10-CM diagnosis code for secondary focal hyperhidrosis. 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 localized hyperhidrosis due to focal neurological disorder. 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.
- Localized hyperhidrosis due to focal neurological disorder
- Secondary focal hyperhidrosis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Frey's syndrome
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- hyperhidrosis - L74.52
- Syndrome - See Also: Disease;
- Frey's
- hyperhidrosis - L74.52
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Frey's syndrome
- hyperhidrosis
- Hyperhidrosis, hyperidrosis
- focal
- secondary
- Hyperhidrosis, hyperidrosis
- localized
- secondary
- Hyperhidrosis, hyperidrosis
- secondary
- focal
- Syndrome
- Frey's
- hyperhidrosis
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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 L74.52 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About L74.52Overview
Is L74.52 (Focal hyperhidrosis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report secondary focal hyperhidrosis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does L74.52 group to?
When secondary focal hyperhidrosis 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 L74.52?
Under the General Equivalence Mappings, secondary focal hyperhidrosis converts to ICD-9-CM 705.22 (sec focal hyperhidrosis). The mapping is a direct match.
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.
