Nonbullous erythema multiforme

This code identifies a specific type of acute, self-limiting hypersensitivity reaction characterized by target lesions on the skin, often triggered by infections or medications. It represents the milder form of erythema multiforme, lacking the blistering or bullae seen in more severe presentations.

Apply this code when documentation clearly indicates a diagnosis of erythema multiforme without the presence of bullae or severe mucosal involvement. This typically occurs in cases presenting with characteristic target lesions, papules, or plaques. Supporting documentation should include a physician's diagnosis and a description of the skin lesions.

• Differentiate carefully from erythema multiforme major (L51.1) which involves mucosal surfaces and/or bullae.
• Do not use for Stevens-Johnson syndrome (SJS) or toxic epidermal necrolysis (TEN), which are distinct and more severe conditions.
• Always code the underlying cause (e.g., infection, adverse drug reaction) first, if known and documented, as an additional diagnosis.