Prior authorization has long been a challenge in health care—causing delays in treatment and frustration for beneficiaries, providers, and agents alike.
Now, change is on the horizon. Both health plans and the Centers for Medicare & Medicaid Services (CMS) are implementing major reforms, including a new pilot program aimed at reshaping how prior authorization works across Medicare.
It’s essential to stay up to date on these changes for 2026 and 2027 so you can guide your clients with confidence and help them navigate what’s ahead.
What Is Prior Authorization?
Before we get into the upcoming changes, it’s important to understand what prior authorization means—since many clients may not be familiar with the term.
In health insurance, prior authorization is the approval a health care provider must receive from the insurer before delivering certain services. Within Medicare, it’s essentially confirmation from the program that the service will be covered once it’s provided.
If care is denied based on medical necessity, the decision must be reviewed by a qualified clinician. This ensures that determinations are guided by medical expertise rather than only administrative processes.
For CMS, prior authorization also serves as a safeguard to:
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Monitor payments
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Ensure services are medically necessary
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Prevent improper billing and fraud
Overall, it’s a key part of Medicare’s broader fraud and abuse prevention strategy.
Medicare Advantage Plans to Simplify Prior Authorization
Following discussions with the Department of Health and Human Services (HHS), several Medicare Advantage insurers have pledged to streamline the prior authorization process. These changes will be introduced over the next two years.
Note: Participation is voluntary. You can view the list of health plans that have committed to these reforms here.
Starting in 2026
Beginning January 1, 2026, Medicare Advantage insurers will:
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Reduce the number of medical services requiring prior authorization
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Honor prior authorizations from a member’s previous plan for up to 90 days, provided the service is in-network and covered under the new plan
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Offer clear, plain-language explanations for all decisions, along with straightforward appeal instructions
Starting in 2027
Beginning January 1, 2027, additional updates will include:
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Implementation of a standardized electronic prior authorization system
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Real-time approvals for at least 80% of requests when all required documentation is provided
This move toward a unified digital framework is designed to cut down on delays, reduce confusion, and create a smoother experience for beneficiaries, providers, and agents alike.
Original Medicare Introduces WISeR Prior Authorization Requirements
The Centers for Medicare & Medicaid Services (CMS) has introduced the Wasteful and Inappropriate Service Reduction (WISeR) Model, a new initiative aimed at reducing unnecessary care in Original Medicare.
From January 1, 2026, through December 31, 2031, WISeR will test a technology-driven prior authorization process for select services that are considered vulnerable to overuse, such as:
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Skin substitutes
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Nerve stimulator implants
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Knee arthroscopy
The program will use artificial intelligence (AI) and machine learning to help process requests more efficiently. However, all final determinations will continue to be made by licensed clinicians to maintain accuracy and ensure patient safety.
Who Will Be Affected by These Changes?
Nearly 99% of Medicare Advantage enrollees are currently in plans that require prior authorization for certain services, including:
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Skilled nursing facility care
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Part B prescription drugs
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Inpatient hospital admissions
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Outpatient psychiatric treatment
The new WISeR program will initially launch in just six states: New Jersey, Ohio, Oklahoma, Texas, Arizona, and Washington.
Beginning in 2026, clients in these states will see prior authorization applied to 17 specific services that CMS has identified as particularly vulnerable to fraud, waste, and abuse.
For years, prior authorization has been one of the biggest pain points in health care—frustrating patients, burdening providers, and challenging agents who often step in to guide clients through the process.
Not affiliated with or endorsed by Medicare or any government agency.
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