ICD-10-CM > L00-L99 > L49-L54 L49-L54 Urticaria and erythema Type 1 Excludes Lyme disease (A69.2-)rosacea (L71.-) Codes L49Exfoliation due to erythematous conditions according to extent of body surface involvedL50UrticariaL51Erythema multiformeL52Erythema nodosumL53Other erythematous conditionsL54Erythema in diseases classified elsewhere