Prices depend on the model and the supplier. If you shop around, you may be able to find FreeStyle Libre sensors for as low as $75 per month while Dexcom G6 sensors can cost about four times that price per month. These items are considered medical supplies under Medicare coverage rules, so you are responsible for your Medicare Part B deductible — $226 in 2023 — and then 20% of the cost after you’ve hit the deductible.