MedPay vs. Health Insurance: Who Pays Your Medical Bills After an Arizona Car Accident?

In Arizona, there is no single "one payer" for crash-related medical bills — instead, MedPay (if you carry it), your own health insurance, and eventually the at-fault driver's liability coverage typically pay in that order, with reimbursement rights sorted out later in your settlement.

Arizona is a fault-based state, not a no-fault state

Some states require drivers to carry no-fault Personal Injury Protection (PIP), which pays medical bills automatically regardless of who caused the crash. Arizona does not. Arizona's minimum auto insurance law, A.R.S. § 28-4009, requires drivers to carry liability coverage of at least $25,000 per person and $50,000 per accident for bodily injury, plus $15,000 for property damage (for policies issued or renewed on or after July 1, 2020) — but it does not require any medical payments coverage. That single fact explains most of the confusion people feel in the days after a crash: there is no guaranteed, automatic medical-bill payer built into the minimum insurance every Arizona driver must carry.

Where MedPay fits in

Medical Payments Coverage, usually called MedPay, is an optional add-on many Arizona drivers carry on their own auto policy — often in amounts like $1,000, $5,000, or $10,000. MedPay is no-fault in the sense that it pays regardless of who caused the crash, and it typically pays out quickly, without waiting for a liability determination. If you have it, MedPay is usually the fastest source of reimbursement for early bills: ER copays, imaging, urgent care, and the first rounds of physical therapy.

Not everyone has MedPay, and even those who do usually exhaust the limit quickly — a single ER visit can outpace a $2,000 or $5,000 MedPay limit. That's where health insurance comes in.

Health insurance as the working payer

For most injured Arizonans, private health insurance (or AHCCCS, or Medicare) ends up doing the heavy lifting while a claim is pending, because a liability claim against the at-fault driver can take months to resolve. Two things are worth knowing:

• Tell your health insurer about the accident. Many health plans ask, and some coordination-of-benefits or subrogation clauses in the plan documents require it.
• Your health insurer may have a right of reimbursement (subrogation) out of any eventual settlement or judgment for the amounts it paid toward your crash-related care. This is a separate mechanism from the hospital and provider liens discussed in our guide to Arizona hospital and health care provider liens — a health-insurer subrogation claim and a direct provider lien can both exist on the same case, and they are negotiated differently.

The at-fault driver's coverage comes last

The at-fault driver's liability coverage (or your own underinsured/uninsured motorist coverage, where it applies) is usually the last piece to pay out, because it only resolves when the claim or lawsuit settles or a court decides fault and damages. At that point, MedPay, health-insurance subrogation, and any provider liens are typically all accounted for and paid or negotiated down out of the proceeds — which is why organized recordkeeping matters so much in the meantime.

Practical steps while your claim is open

• Check your own auto policy's declarations page for a MedPay line before assuming you don't have it.
• Keep every Explanation of Benefits (EOB) your health insurer sends — these documents show what was billed, what was covered, and what (if anything) you owe, and they become important if a subrogation claim is raised later.
• Avoid paying provider bills out of pocket if a lien or subrogation claim may apply to the same charges; paying first can complicate reimbursement.
• If you're not sure which coverage should be billed first for a specific charge, a licensed Arizona attorney or your insurance company's claims representative can walk through the specific coordination-of-benefits rules that apply to your policies.

For the practical side of staying organized while these payers sort things out, see our companion guide on organizing medical records and bills after an Arizona crash.

This article is general information about how medical bills are typically handled after a car accident in Arizona and is not legal or insurance advice. Coverage details vary by policy and insurer — consult your policy documents or a licensed Arizona attorney about your specific situation.