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If you've been hurt in a crash, one of the first questions on your mind is probably this: Arizona car accident medical bills — who pays? The short answer is that it depends on the circumstances, the insurance coverage available, and whether a fault determination has been made. The longer answer is what this post is all about. Understanding how medical expenses get handled after a collision can save you from making costly mistakes — and help you protect your right to full compensation.

Arizona Is an At-Fault State — What That Means for Your Bills

Arizona follows a traditional fault-based (also called "tort") system for car accidents. Under Arizona law, the driver who caused the crash is legally responsible for the resulting damages — including medical expenses, lost wages, and pain and suffering. This is different from "no-fault" states, where each driver's own insurance covers their medical costs regardless of who caused the accident.

In Arizona, that means if another driver ran a red light, rear-ended you, or drove drunk and hit your vehicle, their liability insurance is the primary source of compensation for your injuries. Arizona requires all drivers to carry minimum liability coverage of $25,000 per person and $50,000 per accident under ARS § 28-4009. If the at-fault driver is properly insured, their policy should ultimately cover your medical costs — but there's a critical catch: insurance companies don't pay your bills as they come in. They pay at settlement or after a judgment. That gap can leave injured victims scrambling.

So Who Actually Pays Your Medical Bills While Your Claim Is Pending?

This is where many accident victims feel blindsided. While your personal injury claim is being negotiated or litigated, you are responsible for keeping up with your medical bills. Here are the most common sources people use to cover treatment in the meantime:

• Your own health insurance: Your personal health plan (employer-sponsored, ACA marketplace, or AHCCCS/Medicaid) can cover accident-related treatment. Keep in mind that your insurer may place a lien on your eventual settlement to recover what they paid — this is called subrogation.
• Medical payments coverage (MedPay): If you purchased MedPay as part of your own auto policy, it will pay your medical bills up to the policy limit regardless of who was at fault. Arizona insurers are required to offer MedPay, though drivers are not required to carry it.
• Letter of protection (LOP): Some healthcare providers — especially those who work with personal injury attorneys — will treat you on a deferred-payment basis. They agree to wait for payment until your case settles, secured by a letter of protection from your attorney.
• Out-of-pocket payment: In some situations, injured people pay bills as they go and seek reimbursement later as part of their damages claim.

Our car accident attorneys at Sher Law Group help clients navigate all of these options so you can focus on healing, not on fighting billing departments.

What About Uninsured or Underinsured Drivers?

Unfortunately, not every driver on Arizona roads carries adequate insurance — or any at all. The Insurance Research Council has estimated that roughly one in six Arizona drivers is uninsured. If you were hit by an uninsured driver, your options include:

• Uninsured motorist (UM) coverage: If you have UM coverage on your own policy, it steps in to cover your losses when the at-fault driver has no insurance. Under ARS § 20-259.01, Arizona insurers must offer UM and underinsured motorist (UIM) coverage, and you must reject it in writing if you don't want it.
• Underinsured motorist (UIM) coverage: If the at-fault driver has insurance but their limits aren't enough to cover your damages, your UIM coverage can make up the difference.
• Personal assets of the at-fault driver: In theory you can pursue the driver's personal assets, but this is often impractical if they have little to collect.

Reviewing your own policy before an accident happens — and making sure you have UM/UIM coverage — is one of the smartest things any Arizona driver can do.

Arizona's Comparative Fault Rules and How They Affect Your Recovery

Arizona follows a pure comparative negligence rule under ARS § 12-2505. This means that even if you were partially at fault for the accident, you can still recover damages — but your compensation will be reduced by your percentage of fault. For example, if a jury finds you were 20% responsible for the crash, your medical bill recovery would be reduced by 20%.

This is why it matters to have experienced legal representation from the start. Insurance adjusters are trained to find ways to assign you a greater share of the blame, which directly reduces the amount they owe you. For a deeper look at how this works, see our post on Arizona Comparative Negligence Law Explained.

Medical Liens and Subrogation: What You Need to Know Before You Settle

One area that surprises many accident victims is the issue of medical liens. When your health insurer, MedPay carrier, or a healthcare provider under a letter of protection pays or defers your bills, they typically have a right to be repaid from your settlement. If you settle a claim without properly accounting for these liens, you could find yourself legally obligated to repay more than you expected — or even in breach of your settlement agreement.

A skilled attorney will identify all existing liens, negotiate them down where possible (providers will often accept a reduced amount to facilitate settlement), and ensure the math works in your favor before you sign anything. This negotiation alone can put thousands of extra dollars in your pocket.

How Long Do You Have to File a Claim in Arizona?

Under ARS § 12-542, Arizona's statute of limitations for personal injury claims — including car accident cases — is generally two years from the date of the accident. Miss that deadline and you almost certainly lose your right to recover compensation entirely. If a government vehicle or employee was involved, the deadline to file a notice of claim can be as short as 180 days under ARS § 12-821.01. Don't wait to get legal advice.

How Sher Law Group Can Help You Manage Medical Bills After a Crash

At Sher Law Group, we handle the full picture of your car accident claim — not just the courtroom strategy. That means helping you find treatment, coordinating with insurers, managing lien holders, and fighting to make sure you're compensated for every dollar of medical expense you've incurred, past and future. We work on a contingency fee basis, which means you pay nothing unless we win your case.

Whether your accident happened in Phoenix, Scottsdale, or anywhere else in the Valley, our Car Accidents team is ready to step in and take the burden off your shoulders. We also work with clients on a wide range of injury cases — if you or someone you know was hurt in a different type of accident, our personal injury lawyers are here to help.

If you're dealing with the stress of Arizona car accident medical bills and who pays, the best first step you can take is talking to an attorney who knows Arizona law and knows how to maximize your recovery. Call us today at 480-418-7437 for a free, no-obligation consultation. There's no fee unless we win — ever.