Prurigo nodularis

This code represents a chronic inflammatory skin condition characterized by intensely itchy, firm, hyperkeratotic nodules that typically develop on the extensor surfaces of the limbs. These lesions often result from repetitive scratching and rubbing, leading to a vicious itch-scratch cycle.

Use this code when documentation clearly indicates a diagnosis of prurigo nodularis, often presenting with discrete, firm, dome-shaped papules or nodules. Supporting documentation should describe the characteristic morphology and distribution of the lesions, along with the chronic, intensely pruritic nature of the condition.

• Differentiate from other pruritic dermatoses; ensure the documentation specifies "nodularis" to avoid miscoding.
• Consider co-reporting with codes for underlying systemic conditions (e.g., chronic kidney disease, liver disease) if they are identified as contributing factors to the pruritus.
• Avoid using codes for generalized pruritus (L29.x) unless prurigo nodularis is ruled out or not specifically documented.