Wisconsin Physician Services Does Not Process Medicare Applications in Michigan

Wisconsin Physician Services (WPS) is a Medicare contractor that handles claims and coverage decisions, but only for people who live in Wisconsin, parts of Illinois, and a small area of Michigan's Upper Peninsula. If you live in Michigan's Lower Peninsula, WPS is not your Medicare contractor, and they cannot process your Medicare process or claims.

Your Medicare contractor in Michigan is Noridian Healthcare Solutions. Noridian handles all Medicare Part A and Part B claims for Michigan residents, answers coverage questions, and processes requests related to your Medicare benefits. If you need help with a Medicare process or claim in Michigan, you contact Noridian, not WPS.

The confusion often happens because WPS operates in multiple states and people sometimes assume a contractor works everywhere. It does not. Medicare divides the country into regions, and each region has one contractor assigned to it. Knowing which contractor serves your state matters because they are the ones who can actually answer your questions and process your requests.

Key Takeaways

  • Wisconsin Physician Services only serves Wisconsin, parts of Illinois, and Michigan's Upper Peninsula — not Michigan's Lower Peninsula.
  • Noridian Healthcare Solutions is the Medicare contractor for Michigan residents in the Lower Peninsula.
  • Your Medicare contractor is the organization that processes claims, answers coverage questions, and handles requests related to your benefits.
  • Contacting the wrong contractor will delay your request because they will have to refer you to the correct one.

How to Find Your Correct Medicare Contractor in Michigan

The easiest way to confirm which contractor serves you is to call Medicare directly at 1-800-MEDICARE (1-800-633-4227). Tell them you live in Michigan and ask which contractor handles your claims. They will tell you it is Noridian and can give you Noridian's phone number and website.

You can also visit the official Medicare website at Medicare.gov and use their contractor locator tool. Enter your state and zip code, and the tool will show you which contractor is assigned to your area. This takes about two minutes and removes any doubt about who to contact.

If you are in Michigan's Upper Peninsula (the counties of Alger, Baraga, Chippewa, Delta, Dickinson, Gogebic, Houghton, Iron, Keweenaw, Luce, Mackinac, Marquette, Menominee, Ontonagon, and Schoolcraft), WPS does serve your area. For everyone else in Michigan, Noridian is your contractor.

What Noridian Handles for Michigan Medicare Beneficiaries

Noridian processes Medicare Part A claims (hospital stays, skilled nursing facility care, hospice, and home health) and Medicare Part B claims (doctor visits, outpatient services, medical equipment, and lab work). They also make coverage decisions when a doctor or hospital asks whether Medicare will pay for a specific service or procedure.

If you have a question about whether something is covered by Medicare, whether you have met your deductible, or why a claim was denied, Noridian is the organization that answers it. They maintain the records of your claims and benefits for Michigan. WPS cannot access your Michigan Medicare records or make decisions about your coverage.

Noridian also handles appeals if you disagree with a coverage decision or claim denial. If you want to challenge a decision about your Medicare benefits in Michigan, you file the appeal with Noridian, not with WPS or Medicare directly.

When You Might See WPS Information

You might see WPS mentioned in Medicare materials or online because they are a large contractor and they do serve multiple states. Some national Medicare resources list all contractors, which can make it look like WPS serves everywhere. They do not. Always check the specific state and region before assuming a contractor serves your area.

If you moved to Michigan from Wisconsin or Illinois, your old contractor was likely WPS. Your new contractor in Michigan is Noridian. You do not need to do anything to switch — Medicare automatically routes your claims to the correct contractor based on where you live. But if you call WPS after moving, they will tell you they no longer handle your claims and will refer you to Noridian.

How to Contact Noridian for Medicare Questions in Michigan

Noridian's phone number for Medicare beneficiaries in Michigan is 1-866-582-4835. You can also visit their website at Noridian.com and look for the Medicare section. They have online tools to check claim status, read explanations of benefits, and find information about coverage.

When you call, have your Medicare number ready. It is on your Medicare card. Noridian uses it to pull up your records and answer questions about your specific claims and benefits. If you are calling about a claim denial or coverage question, also have the date of service and the provider's name available.

Noridian's phone lines are open Monday through Friday, 8 a.m. to 5 p.m. Eastern Time. Wait times are usually shorter early in the morning or late in the afternoon. If you prefer not to call, you can submit questions through their website and they will respond within a few business days.

Frequently Asked Questions

Can I use WPS if I have a Wisconsin address but spend winters in Michigan?

No. Medicare uses your primary residence — the address where you receive mail and spend most of your time — to determine your contractor. If Michigan is your primary residence, even part-time, Noridian handles your claims. If Wisconsin is your primary residence and you only visit Michigan seasonally, WPS remains your contractor.

What if WPS already processed a claim for me in Michigan by mistake?

Contact Noridian and explain that WPS processed the claim. Noridian can request the claim records from WPS and take over handling it. This sometimes happens when a provider submits a claim to the wrong contractor. Noridian will sort it out and make sure your claim is processed correctly under Michigan's rules.

Does my Medicare Advantage plan change contractors if I move to Michigan?

Your Medicare Advantage plan is separate from your Medicare contractor. The plan itself does not change, but the underlying Medicare contractor that processes claims changes to Noridian. Your plan will continue to work the same way — you still use your plan's network and follow your plan's rules. Noridian just handles the claims behind the scenes.

Can I call WPS to find out which contractor I should contact?

Yes, WPS can tell you that you need to contact Noridian, but it is faster to call Medicare directly at 1-800-MEDICARE or check Medicare.gov. WPS will only refer you to Noridian anyway, so you save a step by going straight to the source.