ICD-10 Code L51.0 – Nonbullous erythema multiforme (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L51.0 – Nonbullous erythema multiforme
What it is
L51.0 identifies nonbullous erythema multiforme, a skin reaction that causes target-like lesions without blistering. Use it when the record clearly documents this specific form of erythema multiforme.
Clinical signs
Typical findings include symmetric target or targetoid skin lesions, often on the extremities, with little or no mucosal involvement. Clinical features vary; refer to documentation.
When to use this code
Use this code when the clinician documents erythema multiforme and specifies that it is nonbullous. It is appropriate when the note describes classic target lesions but does not mention bullae or blistering. If the chart only says “rash” or “eruption,” check documentation before coding.
Do not use for
Do not use L51.0 for bullous erythema multiforme or for other blistering skin disorders. Do not assign it when the diagnosis is uncertain or when the record only describes nonspecific dermatitis.
Coding tip
Code the documented subtype exactly; if nonbullous is not stated, verify the provider’s wording before selecting L51.0.