Millions of Medicare Advantage enrollees face the prospect of losing their current health plan before 2027 coverage begins. Insurer exits and service-area reductions are already in motion, with one major carrier, Molina Healthcare, disclosing plans to drop its Medicare Advantage Prescription Drug product line entirely. The company’s roughly 117,000 affected members represent just one slice of a disruption that analysts estimate could reach up to 5 million people forced to find replacement coverage.
Why Millions of MA Enrollees Face Forced Plan Changes for 2027
The pressure on Medicare Advantage plans traces directly to how the federal government sets payment rates each year. CMS published its 2027 rate announcement, finalizing the benchmarks and payment methodology that insurers use to decide whether staying in a given county is financially viable. When benchmarks fall or fail to keep pace with medical cost trends, plans lose margin, and some choose to exit rather than absorb losses.
County-level ratebook data published by CMS for 2027 show meaningful variation in benchmark changes across geographies. The working hypothesis among researchers tracking these patterns is straightforward: counties where the gap between the 2026 and 2027 benchmarks is largest and most negative will see the highest concentration of contract terminations once full crosswalk data become available. Prior cycles support this logic. When payment rates tighten in a county, insurers pull back service areas or terminate contracts altogether, and beneficiaries in those areas bear the consequences.
Molina Healthcare’s decision offers a concrete example of how rate economics translate into coverage loss. In its Form 10-K filed with the SEC, the company stated it intends to exit its MAPD product for 2027. Its MAPD contracts carry approximately 117,000 members. That single exit accounts for a meaningful share of the company’s premium revenue, suggesting the financial calculus no longer worked for Molina in these markets.
CMS Data, JAMA Research, and the Scale of Disruption
The best available evidence for sizing the disruption comes from CMS itself and from peer-reviewed research that has tracked prior exit cycles. CMS maintains a public enrollment database that records monthly enrollment by plan, contract, and geography. These public-use files form the baseline for any estimate of how many people hold coverage in plans that may terminate.
A study published in JAMA examined forced disenrollments among Medicare Advantage beneficiaries following 2026 plan exits. The researchers used CMS county-level enrollment data alongside the annual Plan Crosswalk files to quantify how many enrollees lost coverage when contracts ended without an automatic replacement. Their peer-reviewed methodology distinguished true plan exits, where beneficiaries must actively choose a new plan, from administrative crosswalks that map members into a successor plan under the same sponsor. The difference matters enormously: a true termination with no crosswalk means an enrollee who does not act during open enrollment defaults to traditional Medicare, potentially losing supplemental benefits like dental, vision, and hearing.
Drawing on those methods, analysts project that the combination of Molina’s exit, smaller regional withdrawals, and targeted county pullbacks by national carriers could cumulatively affect up to 5 million Medicare Advantage members ahead of the 2027 plan year. The exact figure will not be known until CMS releases full contract non-renewal and crosswalk files, but early signals from rate changes and insurer disclosures point toward a disruption larger than typical annual churn.
Regulatory Changes and Plan Strategy
Payment pressure is not the only driver. CMS has also tightened rules around marketing, supplemental benefits, and utilization management through the contract year 2027 final rule. These policies aim to improve transparency and beneficiary protections but can increase administrative costs and constrain how plans design products. For some insurers, especially those with thinner margins or limited scale, the combination of lower benchmarks and stricter requirements makes certain counties or entire product lines less attractive.
Large national carriers typically have more flexibility to redesign benefits, adjust networks, or shift members into alternative contracts. Smaller plans and specialized product lines, such as chronic condition–focused plans, are more exposed. When these plans exit, their members may struggle to find replacement coverage that offers comparable provider networks or disease-management supports.
What Beneficiaries Should Watch for Before 2027
For current Medicare Advantage enrollees, the most immediate risk is being caught off guard. CMS requires plans that are terminating or reducing service areas to notify affected members in advance, but those notices can be easy to miss or misunderstand. Beneficiaries in counties with larger benchmark cuts or with heavy enrollment in a single carrier should pay particular attention to mailings and plan materials heading into the 2026 and 2027 open enrollment periods.
People whose plans are non-renewed will typically have a special enrollment window to select a new Medicare Advantage or Part D plan, or to return to traditional Medicare. However, the default outcome if they do nothing may not preserve their current mix of benefits. Losing a Medicare Advantage plan can mean higher cost-sharing, narrower access to supplemental services, or changes in prescription drug coverage unless a carefully chosen replacement is in place.
Advocates and clinicians can help by steering patients toward unbiased counseling resources, such as State Health Insurance Assistance Programs, and by encouraging an early review of 2027 plan options once they are published. As insurers and regulators finalize their positions for 2027, the emerging pattern is clear: financial and regulatory shifts are converging to reshape the Medicare Advantage landscape, and millions of enrollees will need to navigate plan changes to avoid unintended gaps in coverage and care.
