CMS Explores Auto-Enrolling Seniors Into Medicare Advantage: What It Means for Your Health Coverage

Imagine turning 65 and, without lifting a finger, being automatically signed up for a private health insurance plan through Medicare. That idea is now being seriously considered by the Centers for Medicare & Medicaid Services (CMS), the federal agency that runs the Medicare program. While this might sound convenient, it raises big questions about choice, costs, and the quality of care you could receive.

Currently, when you become eligible for Medicare, you have to actively choose between two main paths: traditional Medicare (also called Original Medicare), which is run directly by the federal government, or a Medicare Advantage plan, which is offered by private insurance companies. If you don’t make a choice, the government automatically enrolls you in traditional Medicare. But now, CMS is exploring a plan that would flip that default: instead of traditional Medicare, seniors who don’t make a choice could be automatically enrolled into a Medicare Advantage plan or an accountable care organization (ACO). This news was first reported by STAT, a health news outlet.

This article explains what this proposed change involves, why it matters to you, and what experts are saying about its potential impact on your health and wallet.

What Are Medicare Advantage and ACOs?

To understand this proposal, it helps to know the basics. Traditional Medicare (Parts A and B) lets you see any doctor or hospital that accepts Medicare nationwide. You pay a monthly premium for Part B, plus you often buy supplemental insurance (called Medigap) to cover gaps like copays and deductibles.

Medicare Advantage (Part C) is an alternative. Private insurance companies contract with Medicare to offer these plans. They must cover everything Original Medicare does, but they often add extras like dental, vision, hearing, or gym memberships. However, Medicare Advantage plans usually have smaller networks of doctors and hospitals, and they often require prior authorization before you can get certain tests or treatments.

An accountable care organization (ACO) is a group of doctors, hospitals, and other providers who work together to coordinate your care. They are financially rewarded if they keep you healthy and avoid unnecessary tests or hospital stays. Some ACOs participate in the Medicare Shared Savings Program.

Why Is CMS Considering This Change?

Chris Klomp, the director of CMS’s Center for Medicare, explained the thinking behind the proposal in an interview with STAT. He argued that automatically enrolling people into Medicare Advantage or an ACO would create a “long-term, secular relationship” between patients and their providers. In other words, it would encourage doctors and insurers to focus on keeping you healthy over time, rather than just billing for each individual service.

The Trump administration has shown a preference for Medicare Advantage over traditional fee-for-service (FFS) Medicare. Republicans argue that Medicare Advantage can save the Medicare program money by using smaller networks and stricter rules to control costs. The Heritage Foundation’s Project 2025 report, which many see as a blueprint for the administration, explicitly recommends making Medicare Advantage the default enrollment option.

The Cost Question: Does Medicare Advantage Actually Save Money?

This is where things get complicated. A report from the Medicare Payment Advisory Commission (MedPAC), an independent congressional advisory group, found that Medicare actually paid $76 million more for Medicare Advantage patients in 2025 than it would have if those same patients had been in traditional FFS Medicare. That’s a significant extra cost, and it comes from taxpayers and beneficiaries.

The MedPAC report noted that these higher payments vary widely across different Medicare Advantage insurance companies. The extra money helps fund the supplemental benefits that Medicare Advantage plans offer, like dental and vision coverage. However, the report warned that “higher MA spending increases Part B premiums for all beneficiaries, including those in FFS Medicare who do not enjoy subsidized supplemental benefits.” This means that even if you stick with traditional Medicare, you could end up paying higher premiums because of the extra costs from Medicare Advantage.

Experts Weigh In: Guardrails and Transparency Needed

Health policy experts have mixed reactions to the auto-enrollment idea. Tom Campanella, a healthcare consultant in Cleveland, Ohio, said in a phone interview that the idea is generally good, but only if it includes strong protections. “If [it] means we’re denying needed and appropriate services, that’s a bad thing. So there needs to be some form of guardrails or user-friendly transparency,” he said, especially in terms of publishing patient outcomes so people can compare plans.

Campanella pushed back on the MedPAC report’s comparison to traditional Medicare. He argued that traditional Medicare itself has problems, like the fee-for-service system that encourages doctors to do more tests and procedures to earn more money. He also pointed out that many people in traditional Medicare have Medigap supplemental insurance, which covers most of their costs and can lead to overuse of healthcare services.

Tricia Neuman, executive director for the Program on Medicare Policy at KFF, raised serious practical concerns. In an email, she asked several key questions:

– How would the government choose a plan on behalf of a beneficiary? Would it be random?

• Would the government consider whether a person’s current doctors are in the plan’s network?
• Would the process favor plans with zero premiums, certain plan types (like HMOs vs. PPOs), or high star ratings?
• What happens to people with serious chronic conditions who depend on their existing doctors?

Neuman also warned that if auto-enrollment leads to higher costs for Medicare, insurers might lose interest in offering these plans.

What About a Three-Year Lock-In?

There is already a bill in Congress that would take this idea further. Representative David Schweikert (R-Ariz.) introduced a bill in May 2025 that would automatically enroll everyone eligible for Medicare Parts A and B into “the MA plan with the lowest premium available to such individual.” The bill says that each auto-enrolled person would be given “an opportunity to decline such enrollment.” However, it also states that anyone who is auto-enrolled into a Medicare Advantage plan cannot, for the following three years, “elect to receive benefits under this title through traditional fee-for-service Medicare under part A or B.” That means a three-year lock-in period where you cannot switch back to traditional Medicare. The bill currently has no co-sponsors.

How This Could Affect You as a Reader

If you are approaching age 65 or are already on Medicare, this proposal could directly affect your healthcare choices. Here are some practical takeaways to keep in mind:

– You still have a choice. For now, auto-enrollment is just a proposal. Even if it becomes policy, you would likely have the option to decline and choose a different plan. But you would need to pay attention to the enrollment period and take action.

• Network matters. If you are auto-enrolled into a Medicare Advantage plan, your current doctors might not be in the plan’s network. This could force you to switch providers, which is especially concerning if you have a chronic condition or a strong relationship with your doctor.
• Costs could rise. The MedPAC report shows that Medicare Advantage may cost the program more than traditional Medicare, which could raise Part B premiums for everyone, including those who stay in traditional Medicare.
• Supplemental benefits aren’t free. While Medicare Advantage plans often offer dental, vision, and hearing coverage, the extra cost is paid for by higher payments from Medicare, which come from taxpayer dollars and beneficiary premiums.
• Read the fine print. If a bill like Schweikert’s becomes law, you could be locked into a Medicare Advantage plan for three years with no way to return to traditional Medicare. That is a long time to be stuck with a plan that might not meet your needs.

What Should You Do Now?

Even though this is just a proposal, it’s wise to start preparing. Here are some steps you can take:

– Learn about your options. Visit Medicare.gov or call 1-800-MEDICARE to understand the differences between Original Medicare, Medigap, and Medicare Advantage.

• Check your doctors’ networks. If you are considering Medicare Advantage, ask your preferred doctors which plans they accept.
• Know your rights. You always have the right to choose your own plan during open enrollment periods. Don’t assume that auto-enrollment is your only option.
• Stay informed. Follow reliable health news sources and check for updates from CMS and Congress. This proposal could change quickly.

The Bottom Line

The idea of automatically enrolling seniors into Medicare Advantage or ACOs is still in the early thinking stages, according to CMS. But it represents a major shift in how Americans access healthcare in retirement. While it could simplify the enrollment process and encourage more coordinated care, it also raises serious concerns about cost, choice, and continuity of care. As health policy experts emphasize, any such change must include strong guardrails, transparent information, and the ability for patients to choose what works best for their individual health needs. For now, the best thing you can do is stay educated and be ready to make an active choice about your Medicare coverage.

Source: MedPage Today