ICD Code L50.0

ICD code L50.0 is allergic urticaria, which refers to hives or raised, itchy welts on the skin caused by an allergic reaction.

1. Sudden onset of raised, erythematous, and pruritic wheals on the skin

2. Lesions that are transient, typically resolving within 24 hours without residual skin changes

3. Clear temporal relationship to exposure to a known or suspected allergen (e.g., food, medication, insect sting)

4. Absence of systemic symptoms such as fever or malaise

5. No evidence of chronic or physical urticaria triggers

6. Patient history supports an allergic etiology (e.g., prior similar episodes after allergen exposure)

7. No signs of angioedema involving deeper tissues unless associated with urticaria

Relevant CPT codes that may be used to treat ICD code L50.0 include:

- 99201–99215 (Evaluation and Management services)

- 94010 (Breathing capacity test)

- 95004 (Percutaneous tests with allergenic extracts)

- 95024 (Intradermal tests with allergenic extracts)

- 95115–95117 (Allergen immunotherapy)

- 96372 (Therapeutic, prophylactic, or diagnostic injection)

- 86580 (Tuberculosis test, if differential diagnosis is needed)

- 99401–99404 (Preventive medicine counseling, if applicable)

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