When coverage ends, revenue that was fully collectible the day before can drop to cents on the dollar overnight.
That shift is becoming a more immediate risk for health system CFOs. Semi-annual Medicaid redeterminations and new work requirements start rolling out in January, creating a coverage disruption that could move faster than annual budgeting cycles. Medicaid and CHIP enrollment fell 5.1 million, or 6%, nationally between June 2025 and June 2026, according to KFF. The Urban Institute projects the new six-month redetermination requirement could cut Medicaid expansion enrollment by another 2 to 3.1 million people by 2028.
Much of that loss may be procedural: a renewal form filed late, a work-requirement hour log that missed the deadline, or a notice mailed to an old address. None of that shows up on a hospital's radar until the claim is denied, and by then the intervention window may already be closed.
The financial stakes are significant. When a patient loses coverage and converts to self-pay, hospitals often collect only a fraction of the full amount owed, commonly in the 5% to 20% range. For a $5,000 procedure, that can mean $4,000 to $4,750 in potential lost revenue per encounter. It can also leave the patient with a bill they did not expect, or a balance they cannot afford without timely coverage, charity care or financial assistance.
Some of the law's financial impact will move slowly enough to budget for. Provider tax limits, for example, phase down gradually starting in 2028 and are projected to reduce state Medicaid funding by $175 billion over the next decade. Self-pay creation moves differently. It can show up between budget cycles, after patients have already been billed and after accounts have moved toward collections or write-offs.
That gap calls for more frequent payer-mix monitoring. The most prepared health systems we work with are building three scenarios into the budget: expected, conservative and downside. Then they check, every month, which scenario the organization is actually tracking toward.
Three are leading indicators, early signs of coverage risk before it hits revenue:
- Renewal failure rates
- Pending eligibility inventory
- Medicaid eligibility denial rate
The other three are lagging indicators, showing whether that risk has already turned into lost revenue:
- Self-pay conversion rate
- Point-of-service collections
- Self-pay AR aging
Expected: In the expected scenario, those six numbers track close to their 2026 baseline, which means the budget's payer-mix assumptions are holding. The focus is maintaining standard front-end workflows, including eligibility screening at registration and financial counseling for patients flagged as Medicaid-pending, while watching the leading indicators closely. Those measures are likely to show a shift before revenue loss appears in the financials.
Conservative: In practice, the conservative scenario could look like the self-pay conversion rate climbing more than two percentage points above its trailing three-month average, or pending eligibility inventory increasing 15% month over month, and holding for a full billing cycle. That would suggest coverage losses are beginning to outpace the budget, though some revenue may still be protected. At that point, leaders may need to revisit staffing, outreach and collection assumptions more frequently and assign clear ownership between finance and revenue cycle. Practical steps include redirecting registration staff toward proactive outreach for patients approaching a redetermination date, reviewing point-of-service financial conversations to ensure they are accurate, consistent and patient-centered and moving the review cadence from monthly to biweekly.
Consider a hypothetical 400-bed system in a Medicaid expansion state. Through the first quarter, its numbers hold steady. By spring, two of the six triggers move together: self-pay conversion rate ticks up alongside pending eligibility inventory and stays elevated through the next billing cycle. Under an annual budget process, the shift may not surface until the next close. Under a monthly scenario review, finance can flag it within weeks, redirect outreach toward patients nearest their redetermination date and intervene before more accounts move deeper into self-pay collections.
Downside: The downside scenario is a sustained move across four or more of the six triggers at once, or a state accelerating its own redetermination timeline faster than the federal deadline requires. At that point, the budget's assumptions may no longer hold. Finance and revenue cycle leaders should reassess staffing and outreach resources, expand charity care screening where appropriate and bring the issue to executive leadership or the board as a margin and access risk, not just a back-end collection problem.
Semi-annual redeterminations and work requirements will test payer-mix assumptions across the industry over the next two years. Health systems that define their scenarios now, while the numbers are still steady, will be better positioned to protect both their margins and their patients.
Matthew Ennen is senior vice president of finance and business development at Ensemble.