If you run a small medical practice in New Jersey, Ohio, Oklahoma, Texas, Arizona, or Washington, something changed on January 1 that you may already be feeling - even if nobody told you what it was.
On that date, the Centers for Medicare and Medicaid Services launched a program called WISeR: the Wasteful and Inappropriate Service Reduction Model. It uses AI to screen prior authorization requests from Medicare patients. And it is generating more denials.
This is not a rumor or a warning about what might happen. It is happening now.
What WISeR Actually Is
WISeR is a six-year pilot program (2026 to 2031) running in six states. CMS has partnered with private technology companies to screen prior authorization requests for a specific list of services it has flagged as having higher rates of fraud, waste, and abuse.
The services currently covered include:
- Skin and tissue substitutes
- Electrical nerve stimulator implants
- Epidural steroid injections
- Knee arthroscopy for osteoarthritis
- Cervical fusions
If your practice performs any of these procedures on Medicare patients, your prior auth requests are now being reviewed by an AI system - before a human clinician ever sees them.
Here is the part that has physicians and practice managers most alarmed: the technology companies running these AI reviews are paid based on a share of the savings from denied claims.
The American Medical Association has been direct about this. In a statement, the AMA said: "AI algorithms employed by payers should not be used as a basis to deny coverage for services that a treating physician determines are clinically indicated."
What Practices Are Experiencing
Reports from the affected states since January describe increased denial rates, more documentation requests, and shorter turnaround windows. CMS targets a 72-hour response time for requests submitted electronically through a WISeR participant portal - which sounds faster, but requires your staff to learn a new system immediately.
If a prior authorization is not obtained before the procedure, the claim gets flagged for pre-payment medical review. That means potential non-payment even after the work is done.
The AMA's 2025 survey data - collected before WISeR launched - already found that 61% of physicians believed AI use by payers was increasing prior authorization denials. WISeR formalized that concern into policy.
The Broader Context: Electronic Prior Auth Is Now Mandatory
WISeR is one piece of a larger overhaul. The CMS Interoperability and Prior Authorization Final Rule, also effective January 2026, now requires Medicare Advantage plans, Medicaid, CHIP, and ACA exchange plans to respond to standard prior auth requests within 7 calendar days (down from 14) and expedited requests within 72 hours.
By January 2027, payers must accept electronic prior authorization via FHIR APIs.
For a large health system with a dedicated IT team, this is a workflow adjustment. For a small practice with two front-desk staff, this is a technology procurement decision.
What You Should Do Now
If you're in one of the six WISeR states:
Check whether your current procedures are on the covered service list. If they are, you need to understand the WISeR portal used by the technology company CMS has contracted in your area and make sure your staff knows how to submit there.
Get your documentation tight. AI systems flag claims based on completeness and pattern-matching against group datasets. A claim that would have passed a human review may fail an AI review if the documentation doesn't match the pattern the system expects.
Know your appeal rights. Denials under WISeR go through standard Medicare appeals. That process exists. Use it.
If you're not in a WISeR state:
Watch it anyway. CMS has structured this as a six-year pilot, which means it is almost certainly designed to expand. The electronic prior auth mandates apply to you regardless of location. The technical changes are coming whether your state is in the pilot or not.
On the Medicare Advantage side:
Washington state passed a law in 2026 stipulating that AI algorithms can only approve, not deny, prior authorizations without human clinical review. Other state legislatures are watching. If you have concerns about how your specific MA plan is using AI, your state's insurance commissioner may be a useful contact.
The Practical Translation
Prior authorization was already consuming an estimated 14 to 16 hours per physician per week in administrative time before WISeR launched. That number is not going down.
The practices that adapt quickest will be the ones that invest in electronic PA tools, tighten their clinical documentation standards, and train staff on the new workflows before a claim gets denied and the revenue is already gone.
The practices that wait are going to spend that time on retroactive appeals instead.
Dr. Renee Carter covers healthcare small business for The Useful Daily. Sources: CMS WISeR Model overview, Jones Day: CMS Launches AI Program to Screen Prior Authorization Requests, AMA on AI and Prior Authorization Denials, DLA Piper: CMS WISeR Model, January 2026