You cannot use GoodRx in combination with Medicare Part D or a Medicare Advantage Prescription Drug Plan. GoodRx can be used to purchase prescriptions as an alternative to using your Medicare coverage.
You may want to use GoodRx instead of going through Medicare for your prescription if the medication isn’t covered by Medicare, the GoodRx prices are lower than the Medicare copay, when you won’t reach your annual deductible, or when you’re in the coverage gap phase (also known as the donut hole) of your plan or when you’re nearing the donut hole.