Specialty Physician Complete Packaged Procedure per treatment per area. Photodynamic therapy (PDT) is a medical treatment that uses a photosensitizing drug (a drug that becomes activated by light exposure) and a light source to activate the applied drug. The result is an activated oxygen molecule that can destroy nearby cells. Dermatology conditions treated with PDT are acne, rosacea, warts, psoriasis, actinic keratosis and skin cancers. Treatment cost includes the facility fee, physician’s fee, related medical procedures and drugs required to administer the plan of care. Not included are diagnostic studies, consultations with additional specialists and cost of complication management; travel, food and lodging.