Acrodermatitis continua

Acrodermatitis continua, also known as Acrodermatitis continua of Hallopeau (ACH), is a rare, chronic, sterile, pustular eruption primarily affecting the distal extremities, particularly the nail beds and fingertips. It is characterized by recurrent pustules, erythema, scaling, and atrophy, often leading to onychodystrophy and anonychia.

This code is used when documentation clearly indicates a diagnosis of acrodermatitis continua. It is appropriate for patients presenting with the characteristic pustular lesions, nail involvement, and chronic course consistent with ACH. Supporting documentation should include physician notes detailing the clinical presentation, location of lesions, and chronicity.

• Differentiate from other pustular dermatoses such as pustular psoriasis, which may have a similar appearance but different underlying pathology.
• Ensure the documentation specifies "continua" to distinguish it from other forms of acrodermatitis.
• Consider additional codes for any associated complications, such as secondary infections or severe nail dystrophy, if documented.