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2025 ICD-10-CM code L20.81

Atopic neurodermatitis. Diffuse neurodermatitis.

Use additional codes to identify any associated manifestations, such as infections or allergic rhinitis.

Medical necessity for treatment of atopic neurodermatitis is established by the presence of signs and symptoms that impact the patient's quality of life, such as persistent itching, sleep disturbance, or impairment of daily activities.

IMPORTANT:L20.8 Other atopic dermatitis

In simple words: Atopic neurodermatitis is a type of eczema that causes itchy, inflamed skin. It often affects areas that bend, like the inside of elbows and knees.

A chronic inflammatory skin disorder, genetically determined, marked by an increased ability to form reagin (IgE), with increased susceptibility to allergic rhinitis and asthma.It is characterized by lichenification, excoriation, and crusting, mainly on the flexural surfaces.

Example 1: A 4-year-old patient presents with itchy, dry patches on the flexor surfaces of their arms and legs, consistent with atopic neurodermatitis., A 15-year-old with a history of asthma and allergies presents with thickened, itchy skin on their neck and wrists, diagnosed as atopic neurodermatitis., An adult patient with a long-standing history of eczema presents with widespread itchy, inflamed skin.After examination and review of their medical history, they are diagnosed with diffuse neurodermatitis, a form of atopic neurodermatitis.

Documentation should include a detailed description of the affected skin, including location, appearance (e.g., lichenification, excoriation, crusting), and associated symptoms (e.g., itching).Patient history of allergies, asthma, and other atopic conditions should also be documented.

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