Erythroderma

Any extent of involvement of the skin, and no more than topical therapy required over the past 12-month period

Any extent of involvement of the skin, and any of the following therapies required for a total duration of less than 6 weeks over the past 12-month period: systemic therapy such as therapeutic doses of corticosteroids, other immunosuppressive drugs, retinoids, PUVA, UVB treatments, biologics, or electron beam therapy

Any extent of involvement of the skin, and any of the following therapies required for a total duration of 6 weeks or more, but not constantly, over the past 12-month period: systemic therapy such as therapeutic doses of corticosteroids, other immunosuppressive drugs, retinoids, PUVA, UVB treatments, biologics, or electron beam therapy

No current treatment due to a documented history of treatment failure with 1 treatment regimen

Generalized involvement of the skin with systemic manifestations (such as fever, weight loss, or hypoproteinemia) AND one of the following