Hello Tiffany! Yes! You can use a GoodRx discount or coupon instead of your Medicare Part D or Advantage plan. However, you can't combine the twoyou can't use a GoodRx coupon to lower your co-pay. Please be aware that prescriptions you fill without using your Medicare insurance will not automatically count towards your deductible or the donut hole. You may want to contact your Medicare provider to find out if you can submit receipts for prescriptions purchased using GoodRx. Many plans will allow you to submit receipts for potential reimbursement and/or credit towards your deductible and other policy limits.