The Centers for Medicare & Medicaid Services is entering the new year with a big experiment in a small but highly watched corner of Medicare: the WISeR Model. Short for the Wasteful and Inappropriate Service Reduction Model, WISeR is CMS’s six-year test of technology-enhanced prior authorization and pre-payment review for selected services in Original Medicare. In plain English, CMS wants to know whether smarter review tools can help reduce services that are unnecessary, unsupported by Medicare coverage rules, or vulnerable to fraud, waste, and abuse.

That sounds tidy on paper. In real life, it is already stirring a pot of policy soup: artificial intelligence, Medicare payment integrity, patient access, provider paperwork, taxpayer protection, and the eternal healthcare question of “Who gets to decide what is medically necessary?” If you are a provider in one of the participating states, a Medicare beneficiary, a hospital administrator, or simply someone who enjoys watching federal healthcare policy do gymnastics, WISeR is worth understanding.

What Is the CMS WISeR Model?

The CMS WISeR Model is a demonstration created through the CMS Innovation Center. Its goal is to test whether enhanced technologies, including artificial intelligence and machine learning, can help review selected Medicare services before payment is made. The model runs from January 1, 2026, through December 31, 2031, in six states: New Jersey, Ohio, Oklahoma, Texas, Arizona, and Washington.

WISeR does not apply to Medicare Advantage. It is focused on Original Medicare, also called Medicare fee-for-service. That detail matters because traditional Medicare has historically used prior authorization far less often than Medicare Advantage or commercial insurance. For many physicians and hospitals, this is the part that makes everyone sit up straighter in the meeting room.

CMS says the model does not change Medicare coverage policy, payment rules, or beneficiary appeal rights. Instead, the agency is moving review earlier in the process for certain items and services. Providers and suppliers can submit a prior authorization request before furnishing the service. If they do not, the claim may still be reviewed before payment through a pre-payment medical review process.

Why CMS Is Testing WISeR Now

CMS has long faced pressure to reduce improper payments and protect the Medicare Trust Fund. Healthcare waste is not just a budget problem; it can become a patient safety problem. A procedure that provides little benefit can still cause complications, anxiety, pain, infection risk, extra bills, and follow-up care. In other words, “low-value care” can be surprisingly expensive, both financially and emotionally.

The WISeR Model focuses on services CMS considers vulnerable to inappropriate use, overuse, or fraud. Examples include skin and tissue substitutes, electrical nerve stimulator implants, epidural steroid injections for pain management, percutaneous vertebral augmentation, cervical fusion, certain nerve stimulation procedures, and arthroscopic lavage or debridement for osteoarthritic knee conditions.

CMS’s logic is simple: if a service already has public Medicare coverage criteria through National Coverage Determinations or Local Coverage Determinations, a review system should be able to check documentation against those rules earlier and more consistently. The agency also argues that technology can speed up the process, reduce manual burden, and help providers avoid delivering services that may later be denied.

How the WISeR Model Works

Prior authorization is optional, but review is not optional

One of the trickiest parts of WISeR is the word “voluntary.” Providers may choose whether to submit a prior authorization request before furnishing a selected service. However, if they skip that step, the claim can still be routed for pre-payment medical review. So the prior authorization request is voluntary in the same way bringing an umbrella is voluntary when the forecast says “high chance of paperwork.”

If a provider submits a request and receives provisional affirmation, the claim is expected to be paid as long as all Medicare coverage, coding, documentation, and billing requirements are met. If the request is not affirmed, the provider can resubmit with additional documentation. CMS has also described opportunities for peer-to-peer review and the continuation of standard Medicare appeals rights after a claim denial.

AI assists the process, but clinicians remain part of the decision

WISeR uses enhanced technology, including AI and machine learning, to support review. CMS has emphasized that recommendations for non-payment must involve appropriately licensed clinicians who apply standardized, evidence-based procedures. That distinction is central to the public debate. Supporters see technology as a faster sorting tool. Critics worry that the model may still create algorithm-driven barriers, especially if technology is used to screen requests before a human thoroughly reviews the patient’s situation.

Private companies participate as model vendors

CMS selected six technology companies as WISeR participants, each assigned to a state and Medicare Administrative Contractor jurisdiction. The participant list includes Cohere Health in Texas, Genzeon in New Jersey, Humata Health in Oklahoma, Innovaccer in Ohio, Virtix Health in Washington, and Zyter in Arizona. These companies are expected to use technology-supported systems and clinical review teams to evaluate whether selected services meet Medicare requirements.

The payment design is another major talking point. Model participants may receive a share of averted expenditures associated with reducing wasteful or inappropriate care, adjusted by performance measures. CMS argues this can reward efficiency and accuracy. Provider groups and patient advocates worry it could create incentives to deny or slow care. That tension is the policy drama at the heart of WISeR.

Which States Are Included?

The WISeR Model is not nationwide. It begins in six states selected across four Medicare Administrative Contractor jurisdictions:

• Arizona
• New Jersey
• Ohio
• Oklahoma
• Texas
• Washington

CMS selected these states using operational and evaluation criteria, including claim volume, geographic diversity, Medicare contractor structures, and the ability to compare outcomes. That evaluation design matters because WISeR is not just a policy; it is a test. CMS wants to measure whether the model reduces inappropriate utilization, lowers spending, improves review accuracy, and avoids harm to beneficiaries.

Services Targeted Under the WISeR Model

The model applies only to a defined set of services, not all Medicare care. CMS has said WISeR excludes emergency services, inpatient-only services, and services that would pose a substantial risk to patients if delayed. The agency’s stated focus is on elective or nonemergent services with existing coverage criteria and a history of concern around waste, abuse, questionable necessity, or patient safety.

Examples include certain pain management procedures, nerve stimulation therapies, selected spine procedures, skin and tissue substitutes, and knee arthroscopy for osteoarthritis. A patient who needs an emergency procedure should not be caught in WISeR’s net. A scheduled procedure that falls into a selected service category, however, may require careful documentation before the provider can confidently expect payment.

For providers, the operational message is clear: documentation has to be clean, complete, and specific. “Trust us, the patient needs it” is not a billing strategy. Medical necessity must be supported with patient history, prior treatments, diagnostic findings, conservative therapy attempts where required, applicable codes, and alignment with Medicare coverage criteria.

Why Supporters Say WISeR Could Help Medicare

Supporters of the CMS WISeR Model see it as a practical response to a real problem. Medicare spends billions on services, and not every billed service is equally useful, necessary, or supported by evidence. When high-cost items or procedures are delivered without proper documentation or outside coverage rules, the system absorbs costs that could otherwise support better care.

From that perspective, WISeR could help in several ways. First, it may identify noncovered or poorly documented services before they are performed, avoiding surprise denials after the fact. Second, it may encourage providers to follow evidence-based criteria more consistently. Third, it may protect beneficiaries from procedures that carry risk without clear benefit. Fourth, it may give CMS a modern toolset for program integrity in Original Medicare.

There is also a workflow argument. If technology can auto-approve straightforward requests and quickly flag incomplete documentation, providers might eventually spend less time chasing payment. That is the optimistic version: fewer faxes, fewer mysteries, fewer “please resubmit the thing you already submitted” moments. Healthcare administration has enough paper dragons already.

Why Critics Are Concerned

Critics are not objecting to the idea of reducing fraud, waste, and abuse. Almost everyone agrees Medicare dollars should be spent wisely. The concern is how WISeR gets there. Major provider organizations, medical societies, hospital groups, and patient advocates have raised questions about delays, administrative burden, denial incentives, transparency, and the role of AI in medical review.

The American Medical Association has warned that WISeR could increase physician administrative burden, delay patient care, and create a precedent for expanding prior authorization in traditional Medicare. The American Hospital Association has urged CMS to address concerns about implementation, oversight, and patient access. Specialty groups, including those representing radiology, pain medicine, and procedural care, have also watched the model closely because several targeted services fall directly within their clinical lanes.

Early reports from Washington state intensified the debate. Hospitals and lawmakers reported that some procedures were taking longer to authorize than expected, with delays affecting pain management and other services. CMS has stated that it is monitoring the model and can take corrective action if participants fail to meet requirements. Still, the early friction shows why implementation details matter. A policy can be elegant in a PowerPoint deck and still trip over a portal login at 4:57 p.m. on a Friday.

What WISeR Means for Medicare Beneficiaries

For people with Original Medicare in participating states, the biggest question is whether WISeR will affect access to care. CMS says beneficiaries keep their freedom to choose Original Medicare providers and suppliers, and that healthcare coverage does not change. In practice, however, patients may notice changes if their doctor needs extra time to submit documentation, wait for a determination, resubmit a request, or appeal a denial.

Patients scheduled for affected services should ask practical questions early. Does this procedure fall under WISeR? Has the provider submitted documentation? Has the request been affirmed? Is there a Unique Tracking Number associated with the claim? What happens if the request is not affirmed? These are not glamorous questions, but neither is waiting weeks for an avoidable paperwork issue to be fixed.

Beneficiaries should also know that a non-affirmed prior authorization is not necessarily the final word on medical need. Providers may resubmit with more documentation, and standard Medicare appeal rights remain available after a claim denial. Still, the patient experience can become more complicated, especially for people managing pain, mobility problems, chronic wounds, or sleep-related conditions.

What Providers Should Do Before WISeR Hits Their Workflow

Providers in the six model states should treat WISeR as an operational readiness project. The clinical team, billing team, compliance team, and scheduling team all need to understand which services are included and what documentation is required. A surgeon may know the patient’s case perfectly, but if the documentation package is missing key coverage elements, the request can still stumble.

A good WISeR preparation plan includes mapping affected CPT and HCPCS codes, identifying which physicians perform targeted services, reviewing Medicare coverage policies, training staff on portal submission rules, creating documentation checklists, and building a process for tracking determinations and Unique Tracking Numbers. Practices should also prepare scripts for patients so that scheduling staff can explain delays without sounding like they are reading from a haunted insurance manual.

For hospitals and large groups, it may help to create a WISeR dashboard. Track submission dates, response times, affirmation rates, non-affirmation reasons, resubmission outcomes, appeal volume, patient delays, and staff hours. Data is the best defense against confusion. It also helps leadership determine whether the model is improving predictability or simply moving administrative burden to another corner of the building.

The Bigger Policy Question: Is This the Future of Medicare?

WISeR is limited, but its implications are larger than the six-state test. If CMS concludes that technology-enhanced review reduces unnecessary spending without harming access, the model could influence future Medicare policy. It may also shape how CMS thinks about AI, prior authorization, medical necessity review, and private-sector technology partnerships.

That is why stakeholders are watching carefully. If WISeR works well, it could become a blueprint for targeted program integrity in Original Medicare. If it causes delays, confusion, or inappropriate denials, it could become a cautionary tale about importing commercial insurance tactics into a public program built around broad provider access.

The model also arrives at a time when healthcare AI is under intense scrutiny. AI tools can process patterns quickly, but medical care is full of exceptions, context, and human complexity. A patient is not a spreadsheet with a pulse. Any AI-supported Medicare review system must be transparent, clinically accountable, appealable, and carefully monitored for unintended consequences.

Practical Examples of How WISeR Could Play Out

Example 1: A pain management procedure

A patient in Washington needs an epidural steroid injection for pain management. The provider submits a WISeR prior authorization request with imaging results, clinical notes, prior conservative treatment history, diagnosis codes, and documentation showing that Medicare criteria are met. If affirmed, the provider receives a tracking number and proceeds with more payment confidence. If not affirmed, the provider may submit additional documentation or request peer-to-peer review.

Example 2: A skin substitute case

A wound care clinic in Texas treats a Medicare beneficiary with a chronic lower extremity wound. Because skin and tissue substitutes have been a major spending concern, documentation must be especially strong. The clinic should show wound measurements, duration, previous treatments, infection status, vascular assessment where relevant, and why the selected product is reasonable and necessary under applicable policy.

Example 3: A provider skips prior authorization

A supplier performs a selected service without submitting a prior authorization request. The claim is later routed for pre-payment medical review. The provider then has to submit documentation after the service has already been furnished. If the documentation is insufficient, payment may be delayed or denied. This is where “optional” can start to feel expensive.

Experience-Based Insights: What WISeR May Feel Like on the Ground

For many healthcare organizations, the real WISeR experience will not begin with a CMS announcement. It will begin with a scheduler saying, “Why did this case get delayed?” or a billing specialist asking, “Where is the tracking number?” That is how big policy often arrives: not with a brass band, but with a confused inbox.

The first experience providers are likely to face is code confusion. A practice may perform dozens of procedures that sound similar, but only certain codes and indications fall under WISeR. That means front-end staff must know exactly which services trigger review. If the team depends on memory, errors will happen. A living checklist tied to CPT, HCPCS, ICD-10, payer rules, and site of service is far safer than “ask Karen, she knows everything.” Karen deserves lunch and a backup system.

The second experience is documentation discipline. WISeR rewards complete records and punishes vague ones. A short note that says “patient failed conservative care” may not be enough if the coverage rule expects dates, treatments, duration, outcomes, and clinical rationale. Providers should write notes as if a reviewer has never met the patient, because the reviewer has not. The chart should tell the story clearly: what is wrong, what has been tried, why this service is needed now, and how it fits Medicare policy.

The third experience is patient communication. Patients may not understand why a service recommended by their physician requires extra review. They may hear “AI” and imagine a robot in a lab coat denying grandma’s procedure while sipping motor oil. Staff should explain calmly that WISeR is a Medicare review process for selected services in certain states, that coverage rules have not changed, and that the provider is submitting information to support medical necessity. Clear communication can reduce anxiety even when the process is frustrating.

The fourth experience is timing pressure. Even if CMS expects many decisions within a few days, providers should not schedule affected procedures as if approval is guaranteed instantly. Build a buffer into scheduling workflows. Track response times by vendor and service category. If delays become frequent, escalate through documented channels. “We called three times” is less powerful than a dated log showing submission time, portal status, follow-up attempts, patient impact, and outcome.

The fifth experience is leadership visibility. WISeR should not be treated as a billing-office problem only. Delays can affect clinic capacity, operating room schedules, physician productivity, patient satisfaction, and cash flow. Leaders should review monthly metrics and ask where the process is breaking down. Are requests being submitted late? Are denials tied to missing documentation? Are certain services more problematic? Are patients canceling because the authorization process takes too long?

The best practical mindset is to treat WISeR as both a compliance requirement and a patient access project. The organizations that adapt fastest will likely be those that combine strong documentation, smart technology, staff training, and patient-friendly communication. The organizations that wait until claims start suspending may find themselves learning Medicare innovation the hard way, which is like learning to swim after being thrown into a pool full of fax machines.

Conclusion

CMS’s WISeR Model is one of the most important Medicare prior authorization experiments to watch in 2026. It is narrow in scope but broad in significance. The model tests whether AI-assisted review, private technology vendors, clinician oversight, and earlier documentation checks can reduce wasteful or inappropriate services in Original Medicare without delaying necessary care.

For CMS, WISeR is about protecting patients and taxpayers. For providers, it is about documentation, workflow, and payment risk. For beneficiaries, it is about whether the promise of smarter review can coexist with timely access to care. The model may become a useful guardrail against low-value services, or it may reveal why prior authorization remains one of healthcare’s least favorite board games. Either way, the new year has made one thing clear: Medicare oversight is getting more digital, more targeted, and, yes, a little WISeR.

Note: This article is for informational publishing purposes and reflects public CMS and U.S. healthcare policy information available as of 2026. Providers and beneficiaries should confirm current requirements through CMS, their Medicare Administrative Contractor, and applicable WISeR participant guidance.