Medicaid and ACA changes bring new considerations for healthcare leaders
The U.S. healthcare system is once again approaching an inflection point, as evolving Medicaid policies and Affordable Care Act (ACA) subsidy changes could reshape coverage stability for millions of Americans.
Medicaid policy changes this year could increase the number of uninsured by 7.5 million by 2034, while ACA Marketplace effectuated enrollment could fall to about 17.5 million people, down from 22.3 million in 2025, according to KFF.
After years of expanded access driven by pandemic-era protections and enhanced subsidies, policymakers could be signaling a shift toward tighter eligibility, reduced federal support and greater state-level variability.
The result is a growing risk of coverage disruption that will reverberate across patients, providers and payers alike.
At the center of this transition is Medicaid, where changes in funding structures and eligibility redetermination processes could lead to significant coverage losses.
KFF reports that states will begin implementing Medicaid policy changes in 2026, including more frequent eligibility redeterminations for ACA expansion adults, and that over half of the projected 7.5 million newly uninsured in 2034 would come from new work requirements starting Jan. 1, 2027.
As continuous enrollment protections unwind and states resume eligibility checks, millions of people—many of whom remain eligible but face uncertain administrative barriers—could be at risk of disenrollment.
This shift could not only challenge access to essential services for vulnerable populations but also place greater strain on safety-net providers that rely on Medicaid reimbursement.
State budgets, already under pressure from rising healthcare costs, may struggle to absorb the downstream effects of increased uninsured rates, especially because federal Medicaid financing cuts are estimated at $911 billion over 10 years.
Simultaneously, shifts in ACA subsidy policies introduce another layer of uncertainty. KFF found that when enhanced premium tax credits expired at the end of 2025, average premium payments rose sharply and average Marketplace deductibles increased by 37%, from $2,759 to $3,786 in 2026.
Enhanced premium tax credits had been a major driver of Marketplace affordability, and their expiration contributed to a sharp decline in effectuated enrollment, with KFF estimating a potential drop of 4.8 million enrollees in 2026.
If these subsidies are scaled back or allowed to expire, affordability challenges could quickly resurface, leading to enrollment declines and gaps in coverage continuity.
For hospitals and insurers, these coverage disruptions translate directly into operational and financial challenges. KFF notes that reduced or stagnant Medicaid payment rates, combined with rising costs and more uninsured patients, could pressure providers to reduce staff, services or even close some facilities, with rural hospitals and hospitals serving a high share of Medicaid enrollees especially vulnerable.
Insurers, meanwhile, must navigate enrollment volatility and shifting risk pools, complicating pricing strategies and network design. The cumulative effect is a less predictable healthcare environment, where planning and resource allocation become increasingly complex.
Key considerations for healthcare leaders
For healthcare leaders, this means taking a proactive approach—investing in patient outreach, strengthening revenue cycle capabilities and using data-driven insights to identify potential coverage gaps before they affect care and reimbursement.
As coverage policies continue to evolve, organizations that remain informed, agile and responsive will be best positioned to navigate uncertainty and support long-term stability.
Learn more about what’s happening in healthcare in our industry outlook.
