Arizona drivers face a real risk every day: the person who causes a car accident may carry no insurance, or not enough to cover serious bodily injury losses. Uninsured and underinsured motorist coverage in Arizona is the protection that steps in when the at-fault driver cannot pay. Victims of Car Accidents across the Phoenix metro are left exposed without it.
By Charles Paglialunga, Esq., Founder, Valley Accident Law, 29 years Arizona personal injury
Arizona’s Uninsured Driver Problem
One in eight drivers on U.S. roads is uninsured, according to research published by the Insurance Research Council in 2023. In Arizona, that number has historically run higher than the national average. That means when you drive the I-10, the Loop 101, or any surface street in Scottsdale or Phoenix, there is a meaningful chance the driver next to you is operating without any liability insurance at all.
When an uninsured driver causes a crash, the victim has no at-fault liability policy to pursue. Arizona does not require drivers to carry uninsured motorist coverage, which means the person who hits you may have nothing to offer beyond a lawsuit that cannot be collected. If that driver has no assets, a judgment against them is worthless. Without uninsured motorist coverage on your own policy, you bear the full cost of your medical bills, lost wages, and pain and suffering alone.
This is not an edge case. It is a daily reality for Arizona crash victims.
What Uninsured Motorist Coverage Pays For
Uninsured motorist coverage is a first-party benefit on your own auto insurance policy. It pays when the at-fault driver has no liability insurance and cannot satisfy a judgment.
Under Arizona law (A.R.S. Section 20-259.01), every insurer issuing a motor vehicle policy in this state must offer uninsured motorist coverage. Policyholders may reject it in writing, but it must be offered. If you are not sure whether you accepted or declined it, that is one of the first things your attorney will confirm.
Uninsured motorist coverage typically compensates for:
- Medical expenses, including emergency care, surgery, and rehabilitation
- Lost wages and loss of future earning capacity
- Pain and suffering
- Permanent disability or disfigurement
- Wrongful death damages for surviving family members
The coverage activates when the at-fault driver has no liability insurance policy in force at the time of the crash.
How Uninsured and Underinsured Motorist Coverage in Arizona Works Together
Underinsured motorist coverage, or UIM, addresses a different but equally common problem. Here, the at-fault driver does carry liability insurance, but their policy limits are too low to cover your full losses.
A driver who carries Arizona’s minimum bodily injury liability of $25,000 per person may not come close to covering a victim with a fractured spine, weeks of hospitalization, and months of lost wages. Once the at-fault driver’s policy is exhausted, your underinsured motorist coverage steps in to fill the gap, up to your own UIM policy limits.
Arizona law treats uninsured underinsured motorist coverage as a single product. Both coverages are purchased together and typically share one combined limit on a standard auto policy.
Underinsured motorist coverage matters most in high-severity crashes: collisions involving commercial trucks, head-on impacts, and any accident that causes traumatic brain injury or spinal cord damage. A victim in those situations can exceed a minimum-limits policy in emergency room costs alone. Uninsured and underinsured motorist coverage in Arizona is what keeps them from absorbing the remainder out of pocket.
Why Arizona’s Minimum Liability Insurance Limits Fall Short
Arizona requires drivers to carry minimum liability insurance of $25,000 per person and $50,000 per accident for bodily injury, plus $15,000 for property damage. These figures have not been significantly updated in decades, while medical costs have risen sharply.
A single overnight hospital stay in Phoenix can exceed $10,000. A serious fracture requiring surgery can cost $50,000 or more. A traumatic brain injury often generates hundreds of thousands of dollars in lifetime care costs. The gap between the state’s minimum liability insurance requirements and actual crash costs is wide.
This is exactly why uninsured and underinsured motorist coverage in Arizona matters even when the at-fault driver has insurance. Their legal minimum may cover only a fraction of your actual losses.
If you are working through a Personal Injury claim and the at-fault driver’s policy has already been tendered, your attorney should evaluate your own UIM limits before you sign any release.
How to File a UM/UIM Claim After a Car Accident
The process for making an uninsured motorist or underinsured motorist claim is more procedurally demanding than most people expect. Your own insurance company does not always cooperate readily, even though you paid the premiums.
Report the crash to your own insurer promptly. Even if the other driver is clearly at fault, notify your carrier quickly. Delayed reporting gives the insurer grounds to contest coverage.
Document the at-fault driver’s insurance status. If they have no insurance, obtain the police report confirming it. If they carry insurance, get a copy of their declarations page showing their limits.
Preserve your medical records. Every visit, procedure, and diagnosis matters. Gaps in treatment are used by insurers to minimize the value of your bodily injury claim.
Do not accept a quick settlement. UM and UIM claims are subject to the same bad-faith insurance standards as third-party claims in Arizona. If your insurer offers far less than your documented losses, that amount is worth contesting.
Watch the statute of limitations. Arizona gives most personal injury victims two years from the date of the accident to file suit. UM/UIM claims often follow the same window, though some policies include contractual notice deadlines that are shorter.
Many UM/UIM claims that cannot be resolved through negotiation go to binding arbitration rather than trial. The arbitration process is governed by your specific policy terms and Arizona law. Having an attorney in your corner during arbitration matters, because the insurer will have legal representation defending its own interests throughout.
Frequently Asked Questions
What is the difference between uninsured motorist and underinsured motorist coverage?
Uninsured motorist coverage pays when the at-fault driver has no liability insurance at all. Underinsured motorist coverage pays when the at-fault driver has liability insurance, but their limits are not enough to cover all of your losses. In Arizona, these are typically sold together as a combined uninsured underinsured motorist coverage package under one shared limit.
Does Arizona require drivers to carry UM/UIM coverage?
Arizona does not require drivers to purchase uninsured motorist coverage. Insurers are required by A.R.S. Section 20-259.01 to offer it, but policyholders may reject it in writing. Many drivers accept or decline without fully understanding what they agreed to. Pulling the full policy declarations is the only way to confirm what coverage is actually in force.
What does bodily injury mean in an insurance context?
Bodily injury refers to physical harm to a person, including fractures, internal injuries, traumatic brain injury, and death. When a policy includes bodily injury liability, it pays for another person’s physical injuries if you are at fault. Uninsured motorist coverage and underinsured motorist coverage apply those same bodily injury protections to your own losses when the responsible driver cannot pay.
Can I stack UM/UIM limits across multiple vehicles in Arizona?
Arizona law permits stacking in certain situations. If you own multiple vehicles on separate policies, or your policy does not contain an anti-stacking clause, you may be able to combine limits from each vehicle. Whether stacking applies depends on specific policy language and is a question your attorney should evaluate before any serious injury claim is resolved.
What happens if the at-fault driver fled and was never identified?
Hit-and-run collisions typically qualify under Arizona uninsured motorist policies as long as you meet the reporting requirements. You must report the crash to law enforcement promptly and notify your insurer without unreasonable delay. Physical contact with the other vehicle is generally required under Arizona UM policies for the claim to qualify.
Talk to Valley Accident Law Before Your Claim Deadline Passes
If an uninsured or underinsured driver injured you, your path to recovery likely runs through your own policy, and that claim deserves the same aggressive handling as any other. A Personal Injury consultation with our experienced and friendly attorney costs nothing. We will explain your legal rights so that you can make the right decisions about your case. The earlier you call, the better, but it’s never too late to find out your legal rights. Valley Accident Law represents injured drivers throughout Scottsdale, Phoenix, Tempe, Mesa, and Chandler at no fee unless we recover for you. Contact / Free Case Review to discuss what your uninsured motorist coverage may be worth.
