How Coordination of Insurance Benefits Works in Michigan

You were hurt in a Michigan car crash, the medical bills are starting to arrive, and now your insurance company has sent a letter asking about something called a coordination of benefits letter for auto insurance.

If the letter gets answered wrong, or you don’t know which policy pays first, providers can stall claims while they chase unpaid balances. You can lose ground on a claim you have every right to make.

Matz Injury Law handles such claims every day, including coordination questions and PIP priority disputes. We know how coordinated and uncoordinated benefits work, what the letter is really asking, and how to push back when an insurer stalls.

What Is a Coordination of Benefits Letter?

A coordination of benefits letter is the document insurance companies use to figure out which policy pays first for crash-related medical bills when you have both auto insurance and health insurance. Under Michigan’s no-fault law, auto insurers use it to confirm how your health plan and auto PIP coverage align before paying claims.

These letters became more common after Michigan’s 2020 no-fault reforms, which let drivers reduce PIP medical limits in exchange for lower premiums. Carriers now need a clear picture of how health coverage interacts with the auto policy.

What the Letter Usually Asks

The letter typically asks for:

• Confirmation that your health insurance is active
• Whether the plan covers injuries from auto accidents
• Your member ID and group number
• Your carrier’s coordination clause language
• A copy of the policy or a summary of benefits

Why Your Auto Insurer Sent You This Letter

Three situations usually trigger the letter, and each comes down to the carrier confirming which policy pays first.

• An active claim: When you file for benefits after a crash, your auto insurer needs to know whether your health plan or the auto policy pays first.
• A renewal: Carriers confirm you still qualify for the reduced PIP tier you chose, and without proof, they may move you to a higher level and premium.
• A new policy: Drivers who pick a lower PIP medical limit must show the carrier their health plan meets Michigan’s requirements.

Coordinated vs. Uncoordinated PIP and Which One You Picked

When you bought your Michigan auto policy, you picked one of two options, and that choice decides who pays first. Coordinated PIP means your health insurance pays first for crash-related medical bills, and your auto no-fault covers what your health plan doesn’t. Uncoordinated PIP means your auto no-fault insurance is the primary payer, no matter what health coverage you have.

Coordinated coverage costs less each month because the auto carrier is only the secondary payer. Most Michigan drivers opt for it without realizing the trade-off. You save on the premium now, but after a crash, health insurance deductibles and exclusions can shrink what actually gets paid.

How to Find Out Which One You Have

Your declarations page tells you. Look for language about “coordination with other health and accident coverage” or an exclusion related to other health coverage.

• Pull your declarations page from your insurer’s app, portal, or paper file.
• Check the policy summary for the coordination clause.
• Call your agent if the language isn’t clear.
• Ask your carrier to send the current coordination status in writing.

When Coordination Doesn’t Apply to Medicare, Medicaid, and ERISA Plans

Federal law overrides your coordination choice in three situations. Federal Medicare Secondary Payer rules say Medicare won’t pay first for crash-related care, so your Michigan auto policy stays primary even if you chose coordinated coverage. Michigan law does give drivers on Medicare a separate option to opt out of PIP medical coverage entirely.

Medicaid works the same way. Federal rules don’t allow Medicaid to pay first for auto-related medical bills, so your auto no-fault policy leads for those bills too.

ERISA plans are the trickiest. These are self-funded health plans offered through many employers, and they often carry their own coordination language. When your health plan and your auto policy both claim to be the second payer, courts usually side with the ERISA plan. That can put your no-fault policy first, even if you chose coordinated coverage. The answer depends on the exact wording of your plan, so speak with an attorney before agreeing to anything.

What to Do When You Get a Coordination of Benefits Letter

The letter comes with a deadline, and missing it can delay benefit payments or shift you to a higher PIP tier you didn’t budget for. The following steps can protect your claim while you work out your answer.

• Note the response date: Read the letter carefully and mark the deadline before anything else.
• Pull your declarations page: You need to know whether you have coordinated or uncoordinated PIP before responding, and the page usually says so near the bottom.
• Confirm your health plan covers auto-injury treatment: Some self-funded ERISA plans exclude crash-related care, which changes your answer and who owes any unpaid bills.
• Keep copies of everything: Save every medical bill, every insurer letter, and every response you send. Coordination disputes often turn on what was said when.
• Call an attorney before signing anything: That matters most if you’re already injured and the bills are piling up.

Why Choose Matz Injury Law for Your Michigan No-Fault Claim

You’re trying to figure out which insurer should pay for your care, and you can’t spend weeks while two carriers argue. Coordination disputes like yours are our regular work. Steven J. Matz founded the firm in 1977 and has handled Michigan no-fault PIP claims ever since. Jared Matz joined as Managing Partner in 2016 and works on cases alongside him. We’ve helped Michigan clients recover over $300 million, and we serve clients all across Michigan, including the Upper Peninsula.

Client Testimonials

“I cannot recommend Steve and his team highly enough. From the very first consultation, the team was professional, compassionate, and incredibly knowledgeable. They took the time to explain every step of the process, answered all my questions, and made sure I felt confident and supported throughout my case. Their attention to detail and dedication truly made a difference. They fought hard on my behalf and achieved a result that exceeded my expectations. Communication was always clear and timely, and I never felt like ‘just another client. If you’re looking for a law firm that genuinely cares and delivers outstanding results, this is the one to call. Thank you for everything!” — Tifani R.

“Jared worked with me when I broke both my ankles at the same time. He was so efficient, friendly and attentive to my needs. He was always in contact with me and answered my calls when I needed to speak to him, or he would call me back soon after. Jared did an outstanding job and looked out for my best interest during this ordeal. I believe Jared got me the most for my injury possible. A special “thank you” to you Jared, and I will refer you to anyone that is in need of an injury lawyer. I owe you a lot of gratitude.” — Lisa S.

Frequently Asked Questions About Coordination of Benefits Letters

Do I Have to Fill Out a Coordination of Benefits Letter from My Auto Insurance?

Yes, in most cases. The letter is how your auto insurer confirms which policy pays first and that your PIP tier matches your actual health coverage. Until it has an answer, the carrier can hold up benefit payments, and at renewal, it may move you to a higher tier and premium.

What Is the Difference Between a Coordination of Benefits Letter and a Qualified Health Coverage Letter?

A coordination of benefits letter tells your auto insurer how your health insurance and auto insurance work together when both could pay for crash-related care. A qualified health coverage letter, by contrast, proves your health plan meets Michigan’s statutory criteria when you opt out of unlimited PIP. Both became common after the 2020 reforms but serve different purposes.

What Happens If My Health Insurance Denies the Claim?

If you have coordinated PIP and your health plan denies a crash-related bill, your auto no-fault carrier may have to step in and pay first. Michigan courts have allowed that shift when you’ve made reasonable efforts to collect from your health plan, and it still won’t pay. If the denial looks wrongful, an attorney can push the bill back where it belongs.

Talk to a Michigan No-Fault Lawyer About Your Coordination of Benefits Letter

If a coordination of benefits letter has you stuck on which insurance pays first, we can help.

Matz Injury Law offers free consultations on Michigan no-fault claims. Our fee is 22%, not 33 1/3%, and there’s no fee unless your case results in a recovery. Call 866-226-6833 or reach us through the contact form to talk through your letter and your claim.