CMS Suspends Medicare Advantage Prior Auth Transparency Rules

If you are enrolled in a Medicare Advantage plan — or considering switching to one during the next Annual Enrollment Period — a quiet regulatory decision out of Washington deserves your full attention. The Centers for Medicare and Medicaid Services has suspended new prior authorization transparency rules that were designed to require Medicare Advantage insurers to publicly disclose how often they deny care requests, which service categories get denied most frequently, and how long enrollees wait for approval decisions. The suspension means that level of public accountability is off the table for now. For the roughly 33 million Americans enrolled in Medicare Advantage plans in 2025, this is not an abstract policy debate — it directly affects your ability to comparison-shop plans based on how they actually treat patients, not just how much they charge in monthly premiums.

Prior authorization is the process by which your Medicare Advantage plan requires your doctor to get permission before you can receive certain services, procedures, medications, or specialist visits. Unlike Original Medicare — which generally does not require prior authorization for medically necessary services covered under Part A or Part B — Medicare Advantage plans are administered by private insurers who set their own prior authorization requirements within federal guidelines. That means a plan can require pre-approval for MRI scans, physical therapy, home health visits, skilled nursing facility stays, durable medical equipment, and some cancer treatments. The insurer then decides whether to approve or deny the request, often within days. When a denial comes, it can delay or block care your doctor has already determined you need — sometimes during a recovery period when timing is everything.

The transparency rules CMS has now suspended were intended to shine a light on exactly how often this happens. Under the proposed framework, Medicare Advantage organizations would have been required to report prior authorization approval and denial rates broken down by service category, post those figures publicly, and make them accessible to beneficiaries shopping during the Annual Enrollment Period, which runs October 15 through December 7 each year. The logic was straightforward: if you are choosing between Plan A and Plan B during open enrollment, you deserve to know that Plan A denies 12% of prior authorization requests while Plan B denies 28%. That kind of data enables real decision-making. Without it, you are largely choosing based on premium and network — two factors that tell you almost nothing about how aggressively a plan manages care once you are enrolled.

The suspension followed what CMS described as public concerns — a phrase that in regulatory language typically signals pushback from the industries being regulated. Medicare Advantage is a massive and profitable business. According to CMS.gov data, there were 3,959 Medicare Advantage plans available to beneficiaries nationally in 2025, and the program now covers more than half of all Medicare-eligible Americans for the first time in the program's history. Insurers have significant financial and lobbying resources, and prior authorization is one of the primary tools they use to manage costs. Requiring them to publish denial rates in a standardized, publicly searchable format would have created competitive pressure to reduce unnecessary denials — which is precisely why the industry opposed it.

The practical consequence of the suspension is that you cannot currently find a single, standardized, government-maintained database that tells you how often your Medicare Advantage plan denies prior authorization requests. Some data does exist in fragmented form. CMS publishes Medicare Advantage plan star ratings at Medicare.gov, and the star rating methodology includes member experience measures that touch on access to care and appeals. A plan with a 5-star rating has generally demonstrated better performance on these measures than a 2-star or 3-star plan. However, star ratings are composite scores — they do not isolate prior authorization denial rates as a standalone metric. You can use the Medicare Plan Finder tool at Medicare.gov to compare plans by premium, deductible, and covered benefits, but denial rate data is not currently a searchable field in that tool.

Data Snapshot: According to CMS.gov data, the average Medicare Part B premium in 2025 is $185.00 per month, and the national Medicare Advantage program enrolled approximately 33.8 million beneficiaries as of early 2025 — representing about 54% of all Medicare-eligible individuals. Among the 3,959 plans available nationally in 2025, CMS star rating distributions show that roughly 31% of plans hold 4 stars or higher, meaning the majority of available plans fall below the threshold CMS uses to define high performance. Beneficiaries enrolled in plans rated below 4 stars have less assurance of strong member experience outcomes, including timely prior authorization decisions.

What you can do right now is use the data that is available. The HHS Office of Inspector General published a report finding that in 2019, Medicare Advantage plans denied 13% of prior authorization requests that actually met Medicare coverage rules — meaning those denials were later overturned on appeal. That figure illustrates the scale of the problem even before accounting for denials that were never appealed. More recent OIG analysis has found that prior authorization denials for post-acute care — including skilled nursing facility stays and home health services — are particularly common and particularly consequential for older adults recovering from surgery or serious illness. If you are recovering from a hip replacement or cardiac procedure and your plan denies a skilled nursing stay, the financial and health consequences can be severe.

If you are currently enrolled in a Medicare Advantage plan and you receive a prior authorization denial, you have specific legal rights that do not disappear because of this regulatory suspension. First, your plan must give you a written denial notice that explains the reason for the denial and describes your appeal rights. Second, you can file a standard appeal, which requires the plan to respond within 30 days for non-urgent requests or within 60 days for a Part D drug appeal. Third — and this is critical — if your doctor certifies in writing that waiting 30 days could seriously jeopardize your health or your ability to regain maximum function, you can request an expedited appeal, and the plan must respond within 72 hours. If the plan upholds the denial after your first appeal, you can escalate to an Independent Review Organization at no cost to you, then to an Administrative Law Judge if the amount in dispute exceeds $180 in 2025, and ultimately to federal court. Many denials are overturned at the first or second level of appeal, particularly when your physician submits a detailed letter of medical necessity that directly references Medicare coverage criteria.

For beneficiaries approaching the Annual Enrollment Period — October 15 through December 7 — the suspension of these transparency rules makes plan selection harder but not impossible. One of the most useful steps you can take is to call the member services number of any plan you are considering and ask directly: does this plan require prior authorization for the specific services I use regularly? If you have a chronic condition requiring regular specialist visits, imaging, infusion therapy, or home health, ask whether those services require pre-approval and what the typical turnaround time is. Plans are required to answer these questions. You can also ask your current doctors whether they have experienced problems getting prior authorizations approved with specific plans — physicians who work with many Medicare Advantage patients often have strong opinions about which plans create the most administrative friction and which ones process requests efficiently.

The Open Enrollment Period, which runs January 1 through March 31 each year, gives Medicare Advantage enrollees one additional opportunity to switch to a different Medicare Advantage plan or return to Original Medicare. If you enrolled in a plan during the fall and discover in January or February that prior authorization requirements are blocking care you need, you are not locked in for the full year. Returning to Original Medicare during this window is always an option. However, if you have been enrolled in Medicare Advantage for more than 12 months and want to purchase a Medigap supplemental policy after returning to Original Medicare, you may face medical underwriting in most states — meaning an insurer can charge you more or deny coverage based on your health history. This is a significant financial consideration that deserves careful thought before you make the switch.

State-level protections can change this calculation meaningfully. If you live in California, Idaho, Illinois, Kentucky, Louisiana, Maine, Maryland, Missouri, Nevada, New Jersey, New York, Oklahoma, or Oregon, your state has a birthday rule that gives you a 30-day window around your birthday each year to switch Medigap plans without medical underwriting. This protection is particularly valuable if you are considering leaving Medicare Advantage and want the predictability of Original Medicare plus a Medigap supplement. Medigap Plan G, which covers nearly all out-of-pocket costs under Original Medicare except the Part B deductible — set at $257 in 2025 — has become the most popular choice for new Medigap enrollees since Plan F was closed to new beneficiaries in January 2020. Average monthly premiums for Plan G vary significantly by state and age, but typically range from roughly $100 to $200 per month for a 65-year-old, according to KFF analysis.

The broader policy context matters here. Prior authorization reform has been a bipartisan issue in Congress, with the Improving Seniors' Timely Access to Care Act passing the House with overwhelming bipartisan support in a prior session. That legislation would have codified many of the transparency and timeliness requirements that CMS was attempting to implement through regulation — including requirements that plans use electronic prior authorization systems and respond to urgent requests within 72 hours. The suspension of the CMS rules makes congressional action more important, not less. AARP has been vocal about the need for stronger prior authorization guardrails, and the issue consistently ranks among the top concerns in Medicare Advantage satisfaction surveys.

For now, the most important thing you can do is stay informed and stay proactive. Before your next enrollment period, review your current plan's Evidence of Coverage document — the detailed booklet your plan sends each fall that lists every service requiring prior authorization. If the list surprises you, that is useful information. If you have had a prior authorization denied in the past year, document it and consider whether a different plan or a return to Original Medicare might serve you better. You can also file a complaint with CMS at 1-800-MEDICARE (1-800-633-4227) if you believe your plan's prior authorization process is causing harmful delays. The rules around Medicare Advantage are changing, and the suspension of these transparency requirements is a reminder that the protections beneficiaries rely on are not permanent — they require ongoing attention and, when necessary, direct advocacy.