Other hypertrophic disorders of the skin

This code represents various conditions characterized by an abnormal increase in the size of skin tissue due to cell proliferation, excluding keloid scars and hypertrophic scars, which have their own specific codes. These disorders involve an overgrowth of skin components, leading to thickened or elevated lesions that are not neoplastic.

Use this code for documented hypertrophic skin conditions that do not fit more specific ICD-10-CM codes, such as localized cutaneous amyloidosis, hypertrophic lichen planus, or other unspecified benign skin overgrowths. Documentation should clearly state "hypertrophic disorder of the skin" and specify that it is not a keloid or hypertrophic scar.

• Do not use this code for keloid scars (L91.0) or hypertrophic scars (L91.0).
• Ensure the documentation specifies the type of hypertrophic disorder if known; otherwise, this code serves as a residual category.
• Consider sequencing this code after a more specific skin condition if the hypertrophy is a secondary manifestation.