AI Prior Auth in Original Medicare: What WISeR Has Done So Far

If you live in Arizona, New Jersey, Ohio, Oklahoma, Texas, or Washington and you have Original Medicare, something changed quietly on January 1, 2026, that you may not have heard about yet. For the first time in the history of Traditional Medicare, artificial intelligence is now involved in deciding whether certain procedures get approved before your doctor can perform them. Six months in, real-world patterns are emerging, the debate is getting louder, and whether this experiment spreads to all 50 states depends largely on what happens next.

You might be wondering: does this affect me? And if it does, what should I be doing about it?

What WISeR Actually Is

CMS (the Centers for Medicare and Medicaid Services) launched a pilot program called WISeR, which stands for Wasteful and Inappropriate Services Reduction. It runs from January 1, 2026 through December 31, 2031, and it covers an estimated 6.4 million Original Medicare beneficiaries across those six states. That’s roughly one in five Original Medicare beneficiaries in the entire country, which is a significant slice of people to test something this new.

Here’s the basic mechanics: six private technology companies are using AI and algorithmic software to conduct coverage reviews for 13 specific procedures. The AI flags potential issues, but a human clinician still makes the final call on approval or denial. CMS has been clear that a person is in the decision loop, not a machine acting alone. That’s an important distinction, though critics argue it doesn’t go far enough in protecting patients.

The procedures targeted are ones CMS believes carry higher risk for waste, fraud, and abuse. As reported by AARP in February 2026, the list includes things like electrical nerve stimulator implants, knee arthroscopy for osteoarthritis, and skin and tissue substitutes. These aren’t rare edge cases. Knee arthroscopy for osteoarthritis, for example, has been a genuinely common procedure for older adults dealing with joint pain.

Which Procedures Are Being Reviewed

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Here’s a closer look at the types of services now subject to AI-assisted prior authorization under WISeR. The full list has 13 items, but these represent the categories most likely to affect everyday beneficiaries.

The logic behind targeting these services is that CMS data showed patterns of overuse or billing irregularities across certain regions. The concern from patient advocates, though, is that “overuse” in the aggregate can still mean “medically necessary” for the individual sitting in a doctor’s office.

What Critics Are Saying, and Why It Matters

The opposition to WISeR has come from a genuinely unusual mix of voices, and that breadth is worth paying attention to.

Seventeen Democratic lawmakers sent a formal letter to CMS Administrator Dr. Mehmet Oz raising concerns that AI-driven decisions could delay or deny care that is medically necessary. AARP, which represents many of the beneficiaries directly affected, has been vocal about the potential for algorithmic reviews to introduce new barriers for people who already face enough complexity in the system. And the American Action Forum, which is a right-leaning policy organization not typically aligned with Democratic critics, has also raised concerns.

When critics from both ends of the political spectrum are worried about the same thing, that’s usually a signal worth taking seriously. The core fear shared by all of them is the same: that an AI system optimized to reduce spending might, in practice, create obstacles for people who genuinely need care, and that the appeals process may be too slow or confusing for older adults to navigate effectively.

CMS has offered one notable carrot to providers: those with strong compliance track records may eventually be exempted from claim reviews. That’s a meaningful incentive for physician groups and hospitals, but it doesn’t directly address what happens to you as a patient when a procedure gets flagged for review.

What This Means If You’re in One of the Six States

If you’re a Traditional Medicare beneficiary in Arizona, New Jersey, Ohio, Oklahoma, Texas, or Washington, and your doctor recommends one of the 13 targeted procedures, prior authorization is now required before the procedure can happen. That means your doctor’s office submits a request, the AI system reviews it, and a human clinician makes the final decision. According to Kiplinger’s January 2026 reporting, this process applies to Original Medicare, not Medicare Advantage, which already used prior authorization extensively before WISeR existed.

A few things to keep in mind as a practical matter:

Your doctor should be handling the submission, not you. But it’s completely reasonable to ask your provider’s office whether they’ve submitted the prior authorization request and what the status is. Don’t be shy about asking.

If your request is denied, you have appeal rights. Medicare’s appeals process exists specifically for situations like this. You can request a redetermination, and if you’re denied again, there are additional levels of review. The official place to start understanding your rights is Medicare.gov, where CMS publishes guidance on appeals.

Documentation from your doctor matters more now than it did before. A well-documented medical record that clearly connects your symptoms, diagnosis, and the recommended procedure to clinical evidence gives the human reviewer something concrete to work with.

The Bigger Stakes: Will This Spread Everywhere?

This is the question that should be on everyone’s radar, not just beneficiaries in the six pilot states. CMS has made clear that the results of WISeR will inform whether prior authorization expands to all of Original Medicare nationwide. GoodRx noted in its June 2026 update that the pilot is being watched closely for exactly this reason.

Six months of data is still early. Denial rates, appeal outcomes, and any documented cases of delayed necessary care are all being gathered right now. Advocates are pushing for that data to be made public and reviewed independently before any expansion decision is made. That seems like a reasonable ask, and it’s worth paying attention to whether CMS commits to transparency as the pilot continues.

If you have concerns, contacting your congressional representative is a legitimate avenue. The bipartisan nature of the criticism suggests there may be appetite in Congress to require additional safeguards or oversight, regardless of party.

Whatever happens with WISeR over the next five and a half years, the experiment has already changed something fundamental: Traditional Medicare, which never required prior authorization for most services, is no longer quite the same program it was on December 31, 2025. For the 6.4 million people living with that change right now, and the millions more who might be affected if it expands, staying informed and knowing your rights is the best thing you can do. If you’re unsure how any of this applies to your specific situation, talking with a licensed Medicare counselor through your State Health Insurance Assistance Program (SHIP) is free and a good place to start.

Sources

• AARP: AI Prior Authorization Pilot Hits Original Medicare (February 19, 2026)
• Kiplinger: Prior Authorization for Traditional Medicare Has Started in 6 States (January 29, 2026)
• GoodRx: Does Medicare Require Prior Authorization? (Updated June 26, 2026)
• Newsweek: New Medicare Program , Full List of Services That Will Need Prior Approval (December 26, 2025)
• Time: Medicare’s New Prior Approval Pilot , What You Need to Know (August 29, 2025)

This article is for informational purposes only. Medicare rules change annually. Always verify current plan details at Medicare.gov or by calling 1-800-MEDICARE (1-800-633-4227). This site does not sell insurance or recommend specific plans.

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