5.1 Million Left Medicaid and 4.6 Million Left the Exchanges: The 2026 Coverage Cut Is Federal, and Hospitals Pay for It in Payer Mix

Count the map correctly first. KFF's Nov. 6 status update shows 41 jurisdictions with an ACA Medicaid expansion — 40 states plus the District of Columbia — and 10 states that never adopted it: Alabama, Florida, Georgia, Kansas, Mississippi, South Carolina, Tennessee, Texas, Wisconsin and Wyoming. That split describes where coverage was extended, not where it is being withdrawn, and the 10 holdouts have produced the same 1.2 million-person coverage gap they produced in 2024.

The 2027 cliff is written into statute, not debated state by state. The 2025 reconciliation law requires monthly work reporting for ACA expansion adults in 44 states including the District of Columbia starting Jan. 1, 2027 or earlier, layered on six-month eligibility redeterminations; the Congressional Budget Office put the law at $911 billion of federal Medicaid spending cuts through 2034 and 7.5 million more uninsured, with more than 5 million of that attributable to work requirements alone. The financing side tightens too: the provider-tax safe harbor steps down from 6% toward 3.5% by fiscal 2032, and grandfathered state-directed payments start shrinking Jan. 1, 2028, in a system where 28 of the 31 affected states levy hospital taxes above 3.5% of net patient revenue.

The chain runs: federal rules set the money, managed care plans reprice the contracts they hold with states, and providers downstream absorb the gap between what a visit costs and what a payer remits. On the volume side, HCA Healthcare estimated that the shift of exchange patients into uninsured status cut pre-tax income by about $400 million in the third quarter, on revenue of $19.849 billion; Medicaid was $1.765 billion, or 8.9% of revenue, while uncompensated care ran $1.477 billion for the quarter. On the price side, provider-tax and state-directed-payment limits remove Medicaid supplemental money from the same hospitals whose tax payments finance it.

Every one of the five largest publicly traded Medicaid plans lost members between June 2025 and September 2026, yet Medicaid revenue held up because rates reset alongside volume: Medicaid revenue rose at Centene and Elevance Health while membership fell. The margin split is the tell. Centene's Medicaid health benefits ratio improved to 93.6% from 93.4%, while Molina's Medicaid medical care ratio worsened to 93.0% from 92.0% on a membership decline of 766,000 — pricing power concentrated where contracts and state footprints are narrower.

In the next two quarters, the Q4 2026 prints and the 2027 guides do most of the work. HCA Healthcare has already framed 2027 as flat earnings with a $550 million to $650 million Medicaid supplemental step-down on 2% to 3% volume growth; Tenet Healthcare carries $356 million of quarterly state-directed Medicaid payments with $32 million of it already identified as prior-year true-up; Centene guides Medicaid membership down 8% to 9% for 2026 and Molina Healthcare to 4.4 million members by year-end. The negotiation calendar matters as much: the 2027 supplementals are already being set, so the January 2028 state-directed-payment reduction is where the next leg of the squeeze lands.

Over one to three years, the fork is in Washington, not in the states. Democrats control both chambers and the first promised votes are Medicaid cuts and enhanced subsidies, but reversing the financing requires the budget process, and analysts at BRG see no reversal before January 2027. If the cuts stand, the budget office's 7.5 million more uninsured and the estimated $31.9 billion hospital revenue loss in 2026 define the trajectory. If they fall, and 41 states hold expansion with workable financing, the status quo becomes the cheapest source of hospital margin recovery available in a decade — which is why the same disclosure that details the 2027 pain also frames the 2028 option.