Medicare's chest X-ray record fell about a third — but most of that is Medicare Advantage, not fewer X-rays
Between 2019 and 2024 the rate rose in 3 state markets and fell in 48, while the national rate went from 823 to 684 per 1,000 — some state markets moving far more than others.
The fee-for-service record shows diagnostic chest X-rays down about 36% — from 30.1 million to 19.1 million. But scaled for the beneficiaries who moved to Medicare Advantage, the all-Medicare estimate fell only about 12%, and has held roughly steady since 2020.
A falling fee-for-service record is the classic Medicare-data trap. As Medicare Advantage grew from about a third of enrollment toward half over the decade, imaging shifted out of the fee-for-service file with no necessary change in the underlying care. The widening gap between the two lines is imaging that moved to Medicare Advantage, not imaging that stopped.
A real decline still sits underneath, but a smaller one. Per fee-for-service beneficiary the rate fell about 24% — from 905 to 684 per 1,000 — and it fell in nearly every state.
The all-Medicare figure is an estimate, not an observation. It assumes Medicare Advantage beneficiaries are imaged at the fee-for-service rate; the true all-payer total is not in this record.
A record of imaging volume and how its fee-for-service basis shifted — not a claim about clinical need or appropriate use, and not a claim that chest X-rays themselves fell a third.
Medicare fee-for-service diagnostic chest X-rays and the all-Medicare estimate, 2015 to 2024 — the observed record against the population-adjusted total.
Not a claim that chest X-rays fell a third (the fee-for-service figure is inflated by the shift to Medicare Advantage), not an observation of the all-Medicare total (an estimate), and not all-payer.