Key Takeaways
What is the CMS WISeR Model and what is it designed to do?
WISeR is a CMS Innovation Center model that uses enhanced prior authorization and pre-payment review for select high-risk services to reduce improper payments and support medical necessity.
Where and when will WISeR apply, and who is impacted?
The voluntary model runs January 1, 2026 to December 31, 2031 in Arizona, New Jersey, Ohio, Oklahoma, Texas, and Washington, impacting providers serving Traditional Medicare beneficiaries in outpatient, ASC, office, and home settings.
Which services are prioritized in Performance Year 1 (2026)?
CMS targets a defined list of higher-risk categories such as nerve stimulators, epidural steroid injections, vertebral augmentation, cervical fusion, select knee arthroscopy, hypoglossal nerve stimulation, incontinence and impotence services, image-guided lumbar decompression, and skin or tissue substitutes.
How does WISeR change prior authorization and documentation timelines?
Prior authorization decisions are typically issued within three business days (two if urgent), and if a claim goes to pre-payment review, additional documentation is generally due within 45 days.
How can providers reduce denials and payment delays under WISeR?
Use consistent documentation tied to NCDs and LCDs, train staff on WISeR-triggering codes, communicate timelines, and track non-affirmations and denials to improve workflows.
The Wasteful and Inappropriate Service Reduction (WISeR) Model is a CMS Innovation Center initiative focused on improving how certain services are reviewed and paid under Traditional Medicare. The model targets services that have a higher risk of improper payment and applies enhanced prior authorization, pre-payment review and clinical oversight to help ensure medical necessity requirements are met.
Participation is voluntary, and the model will run for six years, from January 1, 2026, through December 31, 2031, across Arizona, New Jersey, Ohio, Oklahoma, Texas and Washington.
At a high level, WISeR relies on a combination of enhanced technology and human clinical review to evaluate a defined list of high-risk services before payment is issued. These tools are used to identify documentation gaps and potential concerns while preserving clinical judgment through reviewer oversight. The model does not alter Medicare coverage rules and applies to services furnished in hospital outpatient departments, ambulatory surgical centers, physician offices and home settings for beneficiaries enrolled in Traditional Medicare.
For Performance Year 1 (2026), the selected service categories include:
Service Category, Performance Year 1 -2026 | Associated NCD/LCDs |
| Electrical Nerve Stimulators | NCD 160.7 |
| Sacral Nerve Stimulation for Urinary Incontinence | NCD 230.18 |
| Phrenic Nerve Stimulator | NCD 160.19 |
| Vagus Nerve Stimulation | NCD 160.18 |
| Induced Lesions of Nerve Tracts | NCD 160.1 |
| Epidural Steroid Injections for Pain Management | L39015, L39240, L36920 |
| Percutaneous Vertebral Augmentation (PVA) for Vertebral Compression Fracture (VCF) | L38201, L34228, L35130 |
| Cervical Fusion | L39741, L39758, L39793 |
| Arthroscopic Lavage and Arthroscopic Debridement for the Osteoarthritic Knee | NCD 150.9 |
| Hypoglossal Nerve Stimulation for Obstructive Sleep Apnea | L38307, L38310, L38385 |
| Incontinence Control Devices | NCD 230.10 |
| Diagnosis and Treatment of Impotence | NCD 230.4 |
| Percutaneous Image-Guided Lumbar Decompression for Spinal Stenosis | NCD 150.13 |
| Skin and Tissue Substitutes | L35041, L36690 |
Source: Wasteful and Inappropriate Service Reduction (WISeR) Model provider Factsheet
Overall, the WISeR Model is designed to support appropriate patient care and evidence based best practices while reducing clinically unsupported services and improper payments under Traditional Medicare Parts A and B. The model focuses on services that are vulnerable to fraud, waste and abuse, with the goal of improving payment accuracy without altering underlying Medicare coverage rules.
How WISeR Impacts Providers
For Providers offering certain selected services within the six pilot states (Arizona, New Jersey, Ohio, Oklahoma, Texas and Washington), WISeR introduces changes to how these Medicare services are reviewed and processed. In practice, the impact most often appears in four key areas:
Adjusting prior authorization workflows
Identified services are subject to prior authorization requirements, requiring providers to verify WISeR covered procedures before services are scheduled or preformed. When a required prior authorization is not obtained, the associated claim is automatically placed into pre-payment medical review, which can result in payment delays.
Documentation requirements and turnaround times
Prior authorization requests must be submitted with complete clinical documentation to CMS designated model participant vendors. Standard requests typically receive a response within three business days, while urgent requests are reviewed within two business days. When a claim enters pre-payment review, any additional documentation must be submitted within 45 days to avoid further delays or denials.
Technology driven review of medical necessity
WISeR uses enhanced technologies, including Artificial Intelligence and Machine Learning, to assess medical documentation for gaps, inconsistencies or indicators of potential overuse. These tools are deployed by CMS selected health technology vendors known as model participants and are used to flag non-affirmation requests for review by qualified human clinicians, helping to ensure clinical judgment remains central to the determination process.
Reimbursement impacts, claim denials and payment delays
Although WISeR does not introduce new financial penalties beyond claim denials for unapproved services, reimbursement risk may increase for services with higher payment value, including nerve stimulators and skin substitutes. Payment delays or denials may occur when prior authorization is missing, documentation is incomplete, or medical necessity requirements are not met.
How Providers Stay Compliant with WISeR Rules
Effective WISeR compliance depends on aligning people, processes and documentation with heightened review and authorization requirements. The following operational practices reflect the key areas where providers can strengthen consistency, reduce avoidable delays and better manage compliance risk under the model:
- Assign a dedicated WISeR coordinator or team to oversee requests from submission through final determination and maintain centralized documentation.
- Use standardized documentation templates for WISeR covered services and ensure alignment with Medicare requirements and the appropriate site of care.
- Cross reference procedures with applicable National and Local Coverage Determinations and train clinical and administrative staff to recognize WISeR triggering CPT codes.
- Verify Medicare enrollment status at each visit and clearly communicate expected prior authorization timelines to patients, including alternative scheduling options when appropriate.
- Conduct regular reviews of missing prior authorizations, non-affirmation determinations, timeliness of supplemental documentation and patterns in denial reasons to inform workflow improvements.
- Taken together, these practices support a disciplined and repeatable approach to WISeR compliance and help organizations adapt as model expectations evolve.
Bottom Line
A strong focus on continuity of care, documentation integrity and accurate billing and coding supports the development of an efficient compliance framework aligned with WISeR requirements. Windham Brannon’s Healthcare Team can assist organizations as they work toward these goals. For more information, contact a Windham Brannon advisor or Denise Gaulin today.
