Hypertrophic disorders of skin (L91)

The ICD-10 code L91 covers hypertrophic disorders of the skin, which are conditions characterized by excessive thickening or overgrowth of skin tissue. This group of codes is used to classify and document different types of abnormal skin thickening, including scars and other related skin growths.

The ICD-10 code L91.0 specifically refers to hypertrophic scars, including those commonly called keloid scars, acne scars, or hypertrophic acne scars. These involve raised, thickened scars that may occur after surgery, acne, or skin injuries. Codes like L91.8 describe other hypertrophic skin disorders such as skin tags or fibroepithelial polyps, benign overgrowths typically found on the neck or eyelids. For cases where the hypertrophic skin disorder is not clearly specified, L91.9 applies, capturing conditions like skin graft hypertrophy or general skin thickening without detailed diagnosis. Using these ICD-10 codes helps medical coders accurately identify and document various thickening skin conditions, supporting clear communication in healthcare records and billing for treatments related to hypertrophic skin disorders.