Screening vs Diagnostic
A screening test is done when you don’t have symptoms, to catch a problem early. A diagnostic test is done because you do have symptoms, an abnormal screening result, or a known condition that needs evaluation. The difference matters because Medicare may cover each one differently, and your costs can change based on how the service is billed.
Why it Matters
This is one of the most common reasons people get surprised by a bill. A visit or test that starts as “preventive” can become “diagnostic” if symptoms are evaluated, extra tests are ordered, or a procedure is performed to investigate a concern.
Action Steps
When scheduling, use clear wording: “Annual Wellness Visit” or “preventive screening.”
If you have symptoms, schedule a problem-focused visit and ask what costs may apply.
Before the appointment, ask: “Will this be billed as screening or diagnostic?”
If an abnormal screening leads to follow-up testing, ask what your out-of-pocket costs could be.