Polymorphous light eruption
ICD-10 L56.4 is a billable code used to indicate a diagnosis of polymorphous light eruption.
Polymorphous light eruption (PMLE) is a common photodermatosis characterized by an abnormal skin reaction to sunlight, particularly ultraviolet (UV) radiation. Clinically, PMLE presents as pruritic papules, plaques, or vesicles that typically appear on sun-exposed areas of the skin, such as the face, neck, and arms, within hours to days after sun exposure. The lesions may resolve spontaneously within a week or two but can recur with subsequent sun exposure. The underlying anatomy involved includes the epidermis and dermis, where the immune response to UV radiation leads to inflammation and skin damage. Disease progression can vary, with some individuals experiencing mild symptoms while others may have more severe reactions. Diagnostic considerations include a thorough patient history, physical examination, and sometimes a photopatch test to confirm sensitivity to UV light. Differentiating PMLE from other photodermatoses, such as solar urticaria or lupus erythematosus, is crucial for appropriate management.
Standard ICD-10-CM documentation requirements apply
Various clinical presentations within this specialty area
Follow specialty-specific billing guidelines
Standard ICD-10-CM documentation requirements apply
Various clinical presentations within this specialty area
Follow specialty-specific billing guidelines
L56.4 specifically covers polymorphous light eruption, which includes various presentations of skin lesions triggered by sunlight. It does not cover other photodermatoses like solar urticaria or actinic keratosis.
L56.4 should be used when the clinical presentation aligns with polymorphous light eruption, characterized by pruritic lesions following sun exposure, and when other conditions such as lupus or solar urticaria have been ruled out.
Documentation should include a detailed patient history of sun exposure, description of skin lesions, duration of symptoms, and any previous treatments. Photographic evidence may also support the diagnosis.
