Acanthosis Nigricans

Acanthosis Nigricans (ICD-10 code L83) is a skin condition characterized by dark, velvety patches in body folds and creases, commonly seen in areas such as the neck, armpits, and groin. It is often associated with insulin resistance, obesity, and endocrine disorders. Key clinical points include: 1) It may indicate underlying metabolic conditions, particularly type 2 diabetes; 2) The condition is not infectious but can be a cosmetic concern; 3) Diagnosis is primarily clinical, supported by patient history and physical examination. Etiologically, it can result from genetic factors, obesity, hormonal disorders, or certain medications. Pathophysiologically, it involves epidermal hyperplasia and increased melanin production. Clinically, patients present with thickened, pigmented skin that may be asymptomatic or associated with pruritus. Typical use cases for this diagnosis code include patients presenting with skin changes in the context of obesity or metabolic syndrome.