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  2. ICD-10-CM Codes List
  3. L00–L99
  4. L60-L75
  5. Eccrine sweat disorders (L74)

Eccrine sweat disorders (L74)

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.

Instructional Notations

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

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

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.