Why Is My Health Insurance Asking About My Accident?
You got a letter or form from your health insurer asking whether your recent care was due to an accident or injury: a car crash, a fall, or an injury at work. This is routine, and it is not a scam. Your plan flagged injury-related billing codes and wants to know whether another insurer (auto, workers' compensation, or an at-fault party) should pay instead. It is called a coordination-of-benefits, accident, or subrogation questionnaire. Here is what it means, whether to fill it out (yes), and how it affects your bill.
- It is routine. Injury or accident diagnosis codes trigger the questionnaire automatically. It does not mean you did anything wrong.
- Fill it out, honestly and on time. Most plans will freeze and then deny the claim until you respond. One insurer's form says plainly: "Your claim will not be paid until we hear from you."
- It is about who pays. A work injury goes to workers' comp; a car accident often goes to your auto coverage first. If no one else is responsible, your health plan simply pays.
- You only owe money back if you win a settlement. If your plan pays and you later recover from an at-fault party, it can ask to be repaid from that settlement. That is subrogation.
What This Questionnaire Actually Is
Health plans do not pay for injuries that another insurer is responsible for. When a claim arrives with an injury or accident diagnosis code (a sprain, a fracture, whiplash, physical therapy after trauma), the plan's system flags it and sends you a form to find out what happened.
It goes by several names, an accident questionnaire, a coordination of benefits (COB) form, a subrogation questionnaire, or a third-party liability form, but they all do one thing: figure out whether an auto insurer, a workers' compensation insurer, or an at-fault party should pay the bill instead of, or before, your health plan.
Should You Fill It Out? Yes.
Responding is required by the terms of your health plan, and it is in your interest. If you do not respond, the plan will usually pause and then deny the claim, and that leaves you holding the bill. Insurers put this in plain language on the forms:
Answer it honestly: how you were hurt, the date, whether another party was involved, and their insurer if you know it. That part is straightforward, and there is nothing to hide. You are simply telling your plan who should pay.
Some personal-injury law firms tell you to "call us before you respond." That is because they want your case, not because the questionnaire is a trap. Where you should slow down is a lien or reimbursement agreement they ask you to sign along with it, read it before signing, and if you have a real claim against an at-fault party, that is when an attorney genuinely helps.
What It Is Really About: Subrogation
Underneath, the questionnaire protects the plan's recovery rights. If your plan pays for injury care and you later get a settlement from an at-fault party (say, the other driver's insurer), your plan can ask to be repaid out of that settlement. This is called subrogation or reimbursement. It is legal and common. It does not mean you owe anything now. It only matters if you actually recover money from someone else.
Who Actually Pays Your Injury Bill
| Your situation | Who pays first |
|---|---|
| Injured at work | Workers' compensation, not your health plan. On an accepted claim you should owe nothing. |
| Car crash in a no-fault (PIP) state | Your auto PIP or MedPay first, then health insurance after that runs out. Twelve states are no-fault. |
| Car crash in an at-fault state | Your health insurance now; the at-fault driver's insurer settles at the end (and may repay your plan). |
| No one else is responsible | Your health plan pays as normal, subject to your usual deductible and copays. |
Rules vary by state, and some employer plans set their own order. This is the general pattern, not a guarantee for your plan.
Will You Have to Pay Your Insurance Back?
Only if you recover money from someone else. If you never get a settlement, there is generally nothing to repay. If you do settle:
In many states, your plan can only be repaid after you have been fully compensated for your loss (the "made whole" rule), and it must share the legal cost of getting the settlement (the "common fund" rule). Both can reduce what you owe back.
But self-funded employer health plans (common at large companies) can override those protections, and their repayment rights are stronger. This is where the details of your specific plan matter.
Because this turns on your plan and your state, a real injury claim is worth an attorney's help. What you should not assume is that the first repayment demand is the final number. Those amounts are often negotiable.
How to Protect Yourself
Respond promptly and honestly
Meet the deadline on the form so your claim is not denied for silence. Answer the accident details truthfully.
Make sure the bill goes to the right payer
A work injury should go to workers' comp; a car accident to your auto insurer first. Providers sometimes bill the wrong one, which stalls the claim and can push it into collections.
Read any lien or reimbursement agreement before signing
The questionnaire packet often includes one. It affects how much of any future settlement you keep.
Do not overpay a "sticker" bill
Injury bills, especially from hospitals and physical therapy, are often billed far above what insurers actually pay. If you are left with a large balance, it can usually be reduced. CareRoute Bill Defense reviews and negotiates it, with no fee unless we save you money.
Stuck with an injury bill?
Injury bills are the most tangled kind: multiple insurers, denials, and charges billed above what anyone actually pays. CareRoute sorts out who should pay, appeals wrongful denials, and negotiates the balance down. Free to start, and you only pay if we save you money.
See how Bill Defense worksFrequently Asked Questions
What is a subrogation or accident questionnaire?
It is a form your health insurer sends when a claim looks injury-related. The plan wants to know whether an auto insurer, workers' comp, or an at-fault party should pay instead, so it can coordinate benefits and protect its right to be repaid if you later settle.
Do I have to fill out the injury questionnaire?
Yes. Your plan requires it, and most plans will hold and then deny your claim until you respond, leaving you with the bill. Answer honestly and by the deadline. Be more careful with any lien or reimbursement agreement included in the packet.
What happens if I ignore it?
The plan typically pauses the claim and then denies it for lack of information, which can turn into a bill in your name and, eventually, collections. Responding is the way to keep your coverage flowing.
Will I have to pay my health insurance back?
Only if you recover money from someone else. If your plan pays and you later win a settlement, it can be repaid from that settlement (subrogation). In many states the "made whole" and "common fund" rules reduce what you owe back, though self-funded employer plans can override them. The demand is often negotiable.
Is this letter a scam?
No. Coordination-of-benefits and subrogation questionnaires are a standard part of how health plans handle injury claims. If you are unsure it is genuine, call the member-services number on your insurance card (not a number printed only on the letter) to confirm.
Should I talk to a lawyer?
For the questionnaire itself, no, you can complete it honestly on your own. An attorney is worth it when there is a real injury claim against an at-fault party (a lawsuit or a large settlement), especially to handle liens and protect your recovery. For the medical bills, a bill-negotiation service can help without a lawyer.
Related
Sources
- UMR / UnitedHealthcare (accident claims flyer, "your claim will not be paid until we hear from you")
- Carelon and other payer subrogation / accident-questionnaire materials
- CMS (Medicare Secondary Payer: Medicare is secondary to workers' comp, no-fault, and liability insurance)
- Insurance Information Institute (no-fault auto insurance and the 12 no-fault states)
- State insurance and workers'-compensation agencies (payer order and worker protections vary by state)
This page is general educational information, not legal or insurance advice, and rules vary by state and by plan. Confirm specifics with your insurer or an attorney. Last updated July 2026.