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  2. ICD-10-CM Codes List
  3. L00–L99
  4. L80-L99
  5. Other epidermal thickening (L85)

Other epidermal thickening (L85)

The ICD-10 code section L85 covers a variety of skin conditions characterized by different types of epidermal thickening. These codes specify disorders such as acquired ichthyosis, palmoplantar keratoderma, and other unusual forms of hyperkeratosis that impact skin texture and thickness.

The ICD-10 code L85.0 is used for acquired ichthyosis, also known as acquired paraneoplastic ichthyosis or senile xeroderma, conditions involving dry, scaly skin. L85.1 covers acquired keratosis palmaris et plantaris, with synonyms including keratoderma tylodes palmaris progressiva and chronic hand eczema, indicating thickened skin on palms and soles. L85.2 denotes keratosis punctata, a type of pointed thickening often seen on palms and soles. L85.3 addresses xerosis cutis, commonly called dry skin dermatitis, asteatotic eczema, or pruritic dermatitis. More rare forms and neoplastic variants appear under L85.8, encompassing keratosis pilaris, keratoacanthoma, and other specified epidermal thickenings with multiple synonyms. Lastly, L85.9 is reserved for unspecified epidermal thickening, including hyperkeratosis of nipple or perineum. These detailed codes aid accurate clinical documentation and billing for various thickening skin disorders under the umbrella of other epidermal thickening.

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.

  • hypertrophic disorders of the skin L91

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.

Keratoacanthoma

A benign, non-neoplastic, usually self-limiting epithelial lesion closely resembling squamous cell carcinoma clinically and histopathologically. It occurs in solitary, multiple, and eruptive forms. The solitary and multiple forms occur on sunlight exposed areas and are identical histologically; they affect primarily white males. The eruptive form usually involves both sexes and appears as a generalized papular eruption.