Eccrine sweat disorders (L74) ICD-10-CM
The L74 code range covers eccrine sweat disorders with 16 ICD-10-CM diagnosis codes. 13 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
- generalized hyperhidrosis R61
Codes in the L74 Range 16 codes · 13 billable
- L74 Eccrine sweat disordersNon-billable
- L74.0 Miliaria rubra
- L74.1 Miliaria crystallina
- L74.2 Miliaria profunda
- L74.3 Miliaria, unspecified
- L74.4 Anhidrosis
- L74.5 Focal hyperhidrosisNon-billable
- L74.51 Primary focal hyperhidrosisNon-billable
- L74.510 Primary focal hyperhidrosis, axilla
- L74.511 Primary focal hyperhidrosis, face
- L74.512 Primary focal hyperhidrosis, palms
- L74.513 Primary focal hyperhidrosis, soles
- L74.519 Primary focal hyperhidrosis, unspecified
- L74.52 Secondary focal hyperhidrosis
- L74.8 Other eccrine sweat disorders
- L74.9 Eccrine sweat disorder, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the L74 range.
Apocrine Glands
Large, branched, specialized sweat glands that empty into the upper portion of a HAIR FOLLICLE instead of directly onto the SKIN.
Fox-Fordyce Disease
Chronic pruritic disease, usually in women, characterized by small follicular papular eruptions in APOCRINE GLANDS areas. It is caused by obstruction and rupture of intraepidermal apocrine ducts.
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.
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)
Xerostomia
Decreased salivary flow.
About the L74 Code Range
The ICD-10 code section L74 covers various eccrine sweat disorders, which are conditions affecting the sweat glands responsible for regulating body temperature. These codes help identify specific sweat gland problems, from different types of miliaria (commonly known as heat rash) to abnormal sweating patterns like hyperhidrosis and anhidrosis.
This section includes codes for miliaria forms such as L74.0 (Miliaria rubra, aka prickly heat), L74.1 (Miliaria crystallina), and L74.2 (Miliaria profunda), which describe heat-induced skin eruptions typically affecting infants or individuals exposed to excessive heat. The code L74.4 is used for anhidrosis—the absence or significant reduction of sweating—which may have neurological or genetic causes. For excess sweating, L74.5 and its subcodes specify primary focal hyperhidrosis affecting areas such as the axilla (armpits, L74.510), face (L74.511), palms (L74.512), and soles (L74.513). Secondary focal hyperhidrosis, linked to neurological disorders, is coded as L74.52. Other less common eccrine sweat disorders, including sweat gland cysts and Ross syndrome, fall under L74.8. When the specific type is unknown, L74.9 is assigned. Understanding these codes supports accurate classification and treatment planning for patients with sweat gland conditions.
Questions About This Page
How many billable codes are in the L74 range?
Of the 16 codes in this range, 13 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the L74 range classify?
The range classifies eccrine sweat disorders. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
