Continuous passive motion (CPM) machines
If you meet certain conditions, Medicare Part B (Medical Insurance) covers knee CPM machines as durable medical equipment (DME) that your doctor prescribes for use in your home. For example, if you have knee replacement surgery, Medicare covers CPM devices for up to 21 days of use in your home.
Your costs in Original Medicare
After you meet the Part B deductible , you pay 20% of the Medicare-Approved Amount (if your supplier accepts assignment ). Medicare pays for different kinds of DME in different ways. Depending on the type of equipment:
- You may need to rent the equipment.
- You may need to buy the equipment.
- You may be able to choose whether to rent or buy the equipment.
Medicare will only cover your DME if your doctors and DME suppliers are enrolled in Medicare. Doctors and suppliers have to meet strict standards to enroll and stay enrolled in Medicare. If your doctors or suppliers aren’t enrolled, Medicare won’t pay the claims they submit.
Make sure your doctors and DME suppliers are enrolled in Medicare. It’s also important to ask a supplier if they participate in Medicare before you get DME. If suppliers are participating in Medicare, they must accept assignment (which means they can charge you only the coinsurance and Part B deductible for the Medicare‑approved amount). If suppliers aren’t participating and don’t accept assignment, there’s no limit on the amount they can charge you.