If Medicare does not pay for the test or service that was listed on the ABN, the patient bay be responsible for payment. Medicare does not pay for everything, even if the ordering physician feels the tests or services have clinical value and are medically necessary. The majority of testing performed by med fusion is covered by Medicare, but if a doctor requests testing that MAY NOT BE covered by Medicare med fusion is obligated to and will inform the physician and patient. If you are asked to sign an ABN there are three options available (as shown on the ABN).