Notwithstanding any other law, the department is considered to be the purchaser, but not the dispenser or distributor, of blood factor products under the Genetically Handicapped Persons Program. The department may receive manufacturers’ discounts, rebates, or refunds based on the quantities purchased under the Genetically Handicapped Persons Program. The discounts, rebates, or refunds received pursuant to this section shall be separate from any agreements for discounts, rebates, or refunds negotiated pursuant to Section 14105.3 of the Welfare and Institutions Code or any other program.