Knuckle pads

This code represents a benign, localized thickening of the skin over the extensor surfaces of the interphalangeal joints, most commonly the proximal interphalangeal joints. These lesions are typically firm, fibrous nodules that can be asymptomatic or cause mild discomfort. They are often associated with repetitive trauma or certain systemic conditions.

Use this code when documentation clearly identifies "knuckle pads" as the patient's diagnosis. This diagnosis is typically made clinically based on the characteristic appearance and location of the lesions. Documentation should specify the presence of these fibrous nodules on the knuckles.

• Do not confuse with Dupuytren's contracture (M72.0), although knuckle pads can sometimes be associated with it.
• Ensure the documentation explicitly uses the term "knuckle pads" or a clear synonym describing the characteristic lesions.
• Consider laterality if specified, though knuckle pads are often bilateral.