WISeR Prior Authorization 2026: What Wound Care Needs to Know

If you bill Medicare for wound care, you've probably heard the word WISeR by now. It's a new prior authorization program, and it started on January 1, 2026. For wound care practices, it's a big deal. Skin substitutes are the single largest thing it targets.

What is WISeR?

WISeR stands for Wasteful and Inappropriate Service Reduction Model. It's not a private insurance program. It's Medicare's own prior authorization system, run through the CMS Innovation Center.

Here's how it works. CMS hires private tech companies to review certain Medicare claims before they get paid. These companies use AI, along with real clinicians, to decide if a service should be approved. The program runs for six years, from 2026 through 2031.

Why wound care keeps hearing about it

WISeR doesn't cover every Medicare service. It targets a short list of things CMS sees as high-risk for waste or fraud. Nerve stimulators and epidural steroid injections made the list. So did skin and tissue substitutes.

Skin substitutes are, by far, the biggest piece of that list. One government analysis found WISeR-covered services made up 5.3% of Part B spending in 2024, or $12.3 billion. That's up from just 1.1% in 2019. Most of that growth came from skin substitutes alone. That's why almost every WISeR headline you see is really about wound care.

How the prior authorization process works

You have two paths under WISeR. Path one: you send a prior authorization request before you apply the graft. Path two: you skip that step, and your claim gets pulled for a pre-payment medical review instead, after you've already billed it.

Requests go through your Medicare Administrative Contractor, who passes it to the WISeR tech vendor for review. Standard requests get a decision in 3 days. Urgent requests get one in 2 days. Once approved, your authorization is good for 120 days.

If a request gets denied, you can resubmit it as many times as you need. You can also ask for a peer-to-peer review with a clinician before you give up on it.

One more thing worth knowing. The tech companies running these reviews get paid a share of the savings from claims that got reviewed but never got paid. That payment structure has drawn real criticism, since it ties the reviewer's income to how many claims they turn down.

Where WISeR is active right now

As of January 2026, WISeR only runs in six states: Arizona, New Jersey, Ohio, Oklahoma, Texas, and Washington. It only applies to Original Medicare, not Medicare Advantage plans.

If your practice isn't in one of those six states, you don't need prior auth under WISeR yet. CMS has said it may expand the program, so keep an eye on your state.

An exemption is coming, but not yet

CMS is building a "gold card" exemption for practices with a strong track record. To qualify, you need to submit at least 10 prior authorization requests through WISeR and show you consistently follow Medicare's coverage and coding rules.

CMS plans to share the full criteria in spring 2026. The first exemption notices are expected to go out in June 2026. Until then, every practice in a pilot state has to go through the full process.

WISeR might not survive as is

There's a bill in Congress right now, the Ban AI Denials in Medicare Act (H.R. 6361), introduced on December 2, 2025. If it passes, it would block WISeR and similar AI-driven prior authorization models in Medicare.

Nothing has changed yet. But it's worth watching if you're building long-term processes around this program.

What to do now

A few steps worth taking this quarter:

• Check if your practice sits in one of the six pilot states.

• Build prior auth into your workflow before you apply a graft, not after.

• Keep documentation ready in case a claim gets pulled for pre-payment review instead.

• Track your approval rate. It could help you qualify for the exemption program later.

• Watch for updates. Both the exemption program and the pending legislation could change your process again this year.

Getting ahead of WISeR

WISeR adds a real step to your billing process, right on top of the pay cut that already hit skin substitutes this year. Practices that build prior auth into their workflow now will have an easier time than practices that wait until a claim gets denied.

Is your team already stretched thin tracking prior auth, code changes, and pay cuts at the same time? That's the kind of work 3 Axis RCM handles for wound care practices every day. 3 Axis RCM wound care billing services can help you build a process that keeps up with all of it.

Frequently Asked Questions

What is the WISeR model in Medicare?

WISeR stands for Wasteful and Inappropriate Service Reduction Model. It's a Medicare prior authorization program that started January 1, 2026. It uses AI and clinical review to check certain high-risk services before they're paid, including skin substitutes.

Which states require WISeR prior authorization?

As of 2026, WISeR only applies in six states: Arizona, New Jersey, Ohio, Oklahoma, Texas, and Washington. It only affects Original Medicare, not Medicare Advantage plans.

What happens if I don't get prior authorization under WISeR?

You can still bill the claim, but it will likely go through a pre-payment medical review instead. Medicare reviews your documentation after you've billed the service, before releasing payment, which can slow down your cash flow.