Porphyria cutanea tarda (skin blistering)

Porphyria cutanea tarda is rated under Diagnostic Code 7815, using the General Rating Formula for the Skin. VA looks at two things: how much of your skin is covered by characteristic lesions, and what kind of treatment you have needed over the past 12 months.

A 60% rating applies if lesions cover more than 40 percent of your entire body or more than 40 percent of exposed areas, or if you needed constant or near-constant systemic therapy — meaning treatment taken by mouth, injection, suppository, or through any route other than the skin — during the past 12 months. A 30% rating applies if lesions cover 20 to 40 percent of the entire body or exposed areas, or if systemic therapy was required for a total of 6 weeks or more but not constantly. A 10% rating applies if lesions cover at least 5 percent but less than 20 percent of the entire body or exposed areas, or if intermittent systemic therapy was needed for less than 6 weeks total. A 0% rating applies when no more than topical therapy was needed and lesions cover less than 5 percent of the body or exposed areas. VA may instead rate the condition as disfigurement of the head, face, or neck or as scars, whichever reflects the predominant disability. Complications involving the eyes, mouth, digestive tract, airways, or genitourinary tract are rated separately.