Lenalidomide is a drug used to treat multiple myeloma, which belongs to the scope of national class B medical insurance. According to relevant policies and regulations, eligible adult patients can apply for reimbursement of some expenses. The patient must have received at least one other treatment; After two courses of treatment, you need to provide a valid treatment certificate to continue to receive payment support; It is purchased and used under the prescription of hematologist or hematologist in tertiary hospital.