Major changes affecting Affordable Care Act and Medicaid coverage are beginning to show up in the financial results of some of the country's largest insurers and hospital systems.
Recent earnings reports suggest that declining enrollment, rising medical expenses, and changes in government health programs are creating pressure across the health care industry. Insurers are losing members, hospitals are treating more patients without adequate coverage, and medical costs continue to climb.
Enrollment losses are affecting major insurers
UnitedHealth Group recently reported declines in both Medicaid and ACA enrollment.
The company said new Medicaid eligibility and work requirements contributed to a reduction of approximately 525,000 members within its UnitedHealthcare division. It also expects to lose around 500,000 ACA marketplace members during 2026.
Despite these challenges, UnitedHealth increased its overall earnings outlook. However, the enrollment losses illustrate how quickly policy changes can affect health insurance companies with significant exposure to government-sponsored programs.
Elevance Health reported similar pressures. Its total membership declined by roughly 469,000 people, with much of the decrease coming from Medicaid and ACA plans.
The company also announced that it is withdrawing from the Washington, D.C., Medicaid market and may leave additional markets over the next 12 to 18 months.
These decisions could reduce competition in certain areas and potentially leave consumers with fewer insurance choices.
Hospitals are also absorbing the impact
Health systems are being affected as people lose or discontinue insurance coverage.
HCA Healthcare reported an estimated $400 million financial impact related to patients leaving ACA marketplace plans. The hospital operator expects changes within the ACA market to cost the company between $1 billion and $1.2 billion this year — a figure it revised upward from an earlier estimate of $600 million to $900 million.
When patients lose coverage, hospitals may still provide necessary care, but collecting payment becomes more difficult. This increases uncompensated care and creates additional financial pressure for providers.
A rise in the uninsured population could therefore affect the entire health care system. Hospitals may face more unpaid medical bills, while insurers could be left with smaller and potentially less healthy membership pools.
The expiration of enhanced ACA subsidies is a major factor
One of the largest changes affecting marketplace enrollment is the expiration of enhanced ACA premium subsidies.
These subsidies had made marketplace plans significantly more affordable for many households. Without the additional financial assistance, millions of consumers may face higher monthly premiums or decide they can no longer afford to maintain coverage.
At the same time, Medicaid reductions and new eligibility requirements are removing some people from government-funded coverage.
Together, these changes may create a growing coverage gap. Some individuals may earn too much to qualify for Medicaid but still find marketplace premiums unaffordable.
Rising medical costs are making the problem worse
The pressure is not limited to ACA and Medicaid plans.
UnitedHealth reported that medical costs associated with employer-sponsored insurance increased by approximately 11%, exceeding the company's already elevated expectations.
Several factors are contributing to these increases. The company pointed to aggressive provider billing practices and concerns about how some out-of-network providers are using the arbitration process created under the federal surprise billing law.
Prescription drug expenses are also rising rapidly. Specialty medications and GLP-1 drugs used to treat obesity and diabetes are becoming major cost drivers for health plans.
These treatments can provide meaningful health benefits, but their high prices create challenges for insurers, employers, and consumers.
Could commercially insured patients pay more?
One of the biggest questions moving forward is whether insurers and health systems will attempt to recover losses by increasing costs for people covered through employers or private insurance.
When government programs reimburse providers at lower rates, or when more patients become uninsured, hospitals may negotiate higher prices with commercial insurance companies.
Insurers may then pass those higher expenses to consumers and businesses through increased premiums, deductibles, copayments, or other out-of-pocket costs.
This means changes to ACA and Medicaid programs could eventually affect people who are not enrolled in either program.
What consumers should watch
Consumers should pay close attention to several developments over the coming months:
- Changes in ACA premiums and subsidy eligibility
- Medicaid renewal and work requirements
- Insurer withdrawals from certain states or markets
- Employer health plan premium increases
- Rising prescription drug costs
- Changes to deductibles, copayments, and provider networks
The full financial impact of these policy changes may take several years to become clear. However, current earnings reports show that the effects are already beginning to spread throughout the health care system.
Final thoughts
The health insurance market is highly interconnected.
When people lose Medicaid or ACA coverage, the effects do not stop with those individuals. Hospitals experience more uncompensated care, insurers lose members, employers face higher benefit costs, and commercially insured consumers may eventually pay more.
As enrollment declines and medical expenses continue rising, both health care companies and consumers will need to prepare for a period of increased uncertainty.
For individuals and families, reviewing coverage early and understanding available options may become increasingly important as the market continues to change.
A note on what this means for you: None of the above changes what any single household should do — that depends on your income, your state, and which plans are actually available where you live. If your premium jumped or you lost subsidy eligibility, it's worth having someone look at your specific situation before open enrollment.