Acanthosis nigricans

This code represents a skin condition characterized by hyperpigmentation and thickening of the skin, typically in body folds such as the neck, axillae, groin, and inframammary regions. The affected skin often has a velvety texture and can appear dirty or brownish-black.

Use this code when documentation clearly identifies the presence of acanthosis nigricans. This condition is frequently associated with insulin resistance, obesity, diabetes mellitus, and certain endocrine disorders or malignancies. Documentation should specify the diagnosis of acanthosis nigricans.

• Do not confuse with other hyperpigmentation disorders; ensure the physician explicitly diagnoses acanthosis nigricans.
• Code any underlying conditions, such as diabetes mellitus or obesity, as additional diagnoses.
• Review documentation for laterality if specified, though acanthosis nigricans is often generalized or bilateral.