Medicare Part B (Medical Insurance) covers these tests (like CT scans, MRIs, EKGs, X-rays, and PET scans) when your doctor or other health care provider orders them to treat a medical problem.
After you meet the Part B deductible , you pay 20% of the Medicare-Approved Amount of covered diagnostic non-laboratory tests you get in your doctor’s office or in an independent testing facility.
If you get the test at a hospital as an outpatient, you also pay the hospital a copayment that may be more than 20% of the Medicare-approved amount. In most cases, this amount can't be more than the Part A hospital stay deductible.
Tests to help your doctor diagnose or rule out a suspected illness or condition.
Medicare also covers some preventive tests and screenings to help prevent or find a medical problem.