Psoriasis Area and Severity Index European Medical Agency Version Clinical Classification

**Semantic type:** Intellectual Product

**Definition:** A standardized index developed in 2004 by the Committee for Medicinal Products for Human Use (CHMP) that combines psoriasis disease severity (measured as erythema, infiltration, and desquamation) and body surface area involvement over 4 body regions (head, trunk, upper and lower extremities) to assess progress during treatment.

**Synonyms:** - PASI EMA - PASI EMA Version - PASI04