Bone mass measurement (bone density) How often is it covered? Medicare Part B (Medical Insurance) covers this test once every 24 months for people who meet the criteria below. This test may be covered more often if it's medically necessary. This test helps to see if you're at risk for broken bones. Who's eligible? All qualified people with Part B who are at risk for osteoporosis and meet one or more of these conditions: A woman whose doctor determines both of these (based on