Who Pays Medical Bills After a Car Accident in Arizona?

By Joe Styler, Editor, not an attorney · Sources checked October 18, 2026

Short answer: in the end, the at-fault driver’s liability insurance is supposed to pay for your crash-related medical bills, as part of your injury claim. But that money arrives at the end, when the claim settles, and the bills arrive now. So in the meantime, the question of who pays medical bills after a car accident has a layered answer: your own auto medical payments coverage, your health insurance, AHCCCS or Medicare, and sometimes a provider who waits and files a lien against your claim. Each of those may expect to be repaid from your settlement, and Arizona law puts limits on how much.

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

Some states require your own insurer to pay your medical bills first regardless of fault. Arizona does not have that system. Here, the driver who caused the crash is responsible, through their liability insurance, which must carry at least $25,000 per injured person under A.R.S. § 28-4009. Their insurer does not pay bills as they come in. It pays one settlement, once your injuries are understood, and you sign a release. That gap in time is why the other payers below matter.

The payers, one at a time

1. Medical payments coverage (MedPay) on your own auto policy

MedPay is optional coverage that pays medical bills for you and your passengers up to a set limit, regardless of who caused the crash, under the terms of your policy. It is quick and simple compared to the other options. Check your declarations page for a “medical payments” line. Arizona law lets a MedPay insurer claim a lien, but only on MedPay payments above $5,000, and it must compromise that lien fairly, under A.R.S. § 20-259.01(J).

2. Your health insurance

Your health plan should process crash-related treatment like any other care, subject to your deductible and copays. Your health plan may then claim reimbursement from your injury settlement for what they paid. How strong that right is depends heavily on the kind of plan. A self-funded employer plan can operate under federal rules that differ from an insured individual plan, so ask your lawyer to review the plan document before settlement.

3. AHCCCS

If you are an AHCCCS member, AHCCCS has a lien on your injury claim for the care it paid for, under A.R.S. § 36-2915. That statute also places a duty on the member: you must give AHCCCS written notice within 20 days after starting a lawsuit or other proceeding to collect from an at-fault party or an insurer. Tell your lawyer you have AHCCCS at the first conversation.

4. Medicare

The Centers for Medicare & Medicaid Services explains that when Medicare pays for care another payer is responsible for, the payment is “conditional,” and it must be repaid to Medicare when the beneficiary receives a settlement, judgment or award from a liability insurer. Car accidents are one of the examples CMS gives. Settling without dealing with Medicare’s claim can create problems later, so it needs to be handled as part of the settlement.

5. Providers who wait and file a lien

Some hospitals, ambulance companies and doctors will hold off billing you and record a lien against your claim instead. A.R.S. § 33-931 gives licensed providers and ambulance services a lien for their customary charges on your claim against the at-fault party, with important limits:

• One-third is protected. One-third of any third-party judgment, settlement or award is exempt from these provider liens, under § 33-931(E)(1).
• Not on your own coverage. The lien does not reach your health insurance, MedPay, uninsured motorist or underinsured motorist benefits.
• In-network rules. If the provider is in-network with your health plan, the network contract must expressly allow the lien, or it is invalid except in listed situations. The provider can still collect your copays, coinsurance and deductibles.
• Recording deadline. Providers must record the lien within 30 days of services, or for hospitals within 30 days after discharge, under A.R.S. § 33-932.

What gets repaid at settlement

When the claim settles, the money first goes to resolve what is owed: liens, plan reimbursement claims, Medicare’s conditional payments, and attorney fees and costs. What remains goes to you. That is why the size of these claims, and how well they are negotiated down, can matter as much as the headline settlement number. A lawyer who handles crash claims will review each lien for validity and amount. Our page on what a car accident claim is worth explains what goes into the total.

When the other driver’s insurance is too small

If the at-fault driver carries only the $25,000 minimum and your bills alone pass that, your own underinsured motorist coverage may cover the gap. If the driver had no insurance or fled, see our hit-and-run and uninsured motorist guide.

What to gather this week

• Your auto declarations page. Look for MedPay, UM and UIM limits.
• Your health insurance card and plan name, including whether it comes through an employer.
• Any AHCCCS or Medicare card.
• Every bill, explanation of benefits and receipt, including prescriptions and mileage to appointments.
• Any lien notices or letters from a hospital, ambulance company or “recovery” company.
• The crash report. Our accident report guide explains how to get it.

A note on medical authorizations

The other driver’s insurer may send you a blanket medical records release. Signing it can open your entire history, not just crash-related care. Our page on dealing with the insurance adjuster covers what to sign and what to decline.

Frequently asked questions

Who pays medical bills after a car accident in Arizona?

The at-fault driver’s liability insurer is responsible in the end, as part of your settlement. Until then, your MedPay coverage, health insurance, AHCCCS or Medicare pay, and some may seek repayment from the settlement.

Should I use my health insurance after a car accident?

Generally, yes. It keeps your care going and your bills manageable. Your plan may claim reimbursement from your settlement, and the strength of that claim depends on the type of plan, which a lawyer can review.

Can a hospital put a lien on my car accident settlement?

Yes. A.R.S. 33-931 lets licensed providers record a lien on your claim against the at-fault party. One-third of the recovery is exempt, the lien cannot reach your own UM, UIM, MedPay or health benefits, and in-network providers face extra limits.

Does AHCCCS have to be paid back from my settlement?

AHCCCS has a lien under A.R.S. 36-2915 for the care it paid, and members must give AHCCCS written notice within 20 days after starting a lawsuit or other proceeding to collect.

What is MedPay and do I have it?

Medical payments coverage is optional auto coverage that pays medical bills regardless of fault, up to a set limit. Look for a medical payments line on your auto declarations page.

Do I have to repay Medicare from a car accident settlement?

CMS says Medicare’s payments for care another payer is responsible for are conditional and must be repaid when the beneficiary receives a liability settlement. It should be resolved as part of the settlement.

Related guides

• Flagstaff motor vehicle accident lawyer: the full guide
• What is my car accident claim worth?
• Dealing with the insurance adjuster
• Underinsured motorist claims
• Out-of-state and visitor crashes

Bills piling up? Free and confidential

Find out what your coverage should be paying and what can be negotiated later. We’ll connect you with an independent licensed Arizona attorney who handles Coconino County crash claims.