Medicare Part B covers medically necessary clinical diagnostic laboratory tests, when your doctor or practitioner orders them. These tests are done to help your doctor diagnose or rule out a suspected illness or condition. Medicare also covers some preventive services to help prevent, find, or manage a medical problem.

Part B covers diagnostic non-laboratory tests when these apply:

• Your doctor or other health care provider orders them.

• They're ordered as part of treating a medical problem.

Examples of diagnostic non-laboratory tests include CT scans, MRIs, EKGs, X-rays, and PET scans. These tests are done to help your doctor diagnose or rule out a suspected illness or condition.

The Medicare Supplement Plan G will cover any service that Medicare covers. Medicare Supplement Plan G covers everything but Medicare Part B’s annual deductible of $183.00, so if you have not met your deductible for the year, you would pay the full or remaining amount of that deductible.