Hit by an Uninsured or Underinsured Driver in California? Your Own Policy May Be the Answer

If the driver who hit you had no insurance, or barely enough to cover your emergency room bill, you are not out of options. California law gives you a direct path to compensation through your own uninsured motorist (UM) or underinsured motorist (UIM) coverage. In many cases, that coverage pays for the same damages you would have recovered directly from the at-fault driver.

The problem most victims do not expect is that their own insurer becomes the obstacle. UM and UIM claims are claims against your own policy, and insurers handle them with the same financial calculations they apply to every other claim. They look for reasons to minimize what they pay. At Haffner Law, our understanding of how insurance companies manage these disputes is exactly what we use to hold them to their obligations.

The Difference Between UM and UIM Coverage in California

These two coverages are related but cover different situations. If you were hurt in a collision with a driver who had no insurance or too little of it, Haffner Law can walk you through which coverage applies and how to navigate your recovery after a Los Angeles car accident. 

Uninsured Motorist (UM) Coverage

UM coverage applies when the at-fault driver carries no liability insurance at all. This includes hit-and-run accidents where the driver is never identified. An estimated 16 percent of California drivers carry no insurance ^[1], which means one in six accidents involves an uninsured driver. If you carry UM coverage and they hit you, your insurer steps in to pay what the at-fault driver’s policy would have covered.

Underinsured Motorist (UIM) Coverage

UIM coverage applies when the at-fault driver has insurance, but their policy limits are too low to cover your actual losses. California’s minimum liability requirement is $15,000 per person for bodily injury ^[2]
. If your medical bills, lost wages, and pain and suffering exceed that amount, your UIM policy covers the gap between what the at-fault driver’s insurer pays and your own UIM limit.

California law requires insurers to offer both UM and UIM coverage. Drivers may decline them in writing, but if you are reading this after an accident, check your declarations page. Most drivers who purchased coverage in the last several years have it, even if they never thought much about it.

What UM and UIM Coverage Actually Pays For

Both coverages compensate for the same categories of loss as a standard liability claim:

• Medical expenses, including emergency care, surgery, rehabilitation, and future treatment
• Lost wages and reduced earning capacity if your injuries affect your ability to work
• Pain and suffering, including emotional distress and loss of enjoyment of life
• Permanent disability or disfigurement
• Property damage to your vehicle (under UMPD coverage, subject to a deductible)

Your recovery is capped at your own UM or UIM policy limits. If your damages exceed those limits and the at-fault driver has some insurance, you may be able to stack recoveries. More on that below.

How the Claim Process Works in Practice

Filing a UM or UIM claim is structurally different from a standard third-party claim, and the difference matters.

With a third-party claim, you negotiate with someone else’s insurer. With a UM or UIM claim, you are presenting a demand to your own insurer, under a policy you paid for. In theory, your insurer owes you a good-faith investigation and a fair evaluation. In practice, they often dispute liability, challenge the extent of your injuries, or offer settlements well below what the claim is actually worth.

If your insurer and you cannot agree on the value of your claim, most UM and UIM policies require the dispute to go to binding arbitration rather than a court trial ^[3]. Arbitration is not informal. It requires preparation, evidence, and legal argument. Going in without a lawyer who understands how insurers build their arbitration strategy is a significant disadvantage.

When Your Insurer Is Not Negotiating in Good Faith

California imposes a duty of good faith and fair dealing on every insurer. If your insurer unreasonably delays your claim, denies it without a valid basis, misrepresents your policy terms, or fails to properly investigate, they may be acting in insurance bad faith under California law.

A bad faith violation is not just a breach of contract. It can expose the insurer to damages beyond your policy limits, including attorney’s fees and in some cases punitive damages. This is Haffner Law’s home territory. Joshua Haffner has spent more than 20 years representing policyholders against insurers, and our familiarity with bad faith claims changes how insurers respond at the negotiating table.

Most UM and UIM claimants do not know this option exists. The ones who do, and who have counsel who will use it, tend to get better outcomes.

Can You Stack UM or UIM Coverage in California?

This is one of the most commonly misunderstood questions in California UM and UIM law.

California generally does not allow inter-policy stacking, which means you cannot combine the UM or UIM limits across multiple separate insurance policies you hold on different vehicles to create a larger coverage pool ^[4]. The California Department of Insurance confirms that most standard policies include anti-stacking language. However, some older policies and certain multi-vehicle policies may have different terms depending on when they were issued and how they are written.

Intra-policy stacking, which refers to combining coverage limits across multiple vehicles listed on the same policy, may be available depending on your specific policy language and when it was written. This is a technical question that turns on the exact wording of your policy and applicable California case law.

If you have multiple policies or a multi-vehicle policy, do not assume stacking is off the table. Let an attorney review your specific coverage before you accept any determination from your insurer.

Steps That Protect Your UM or UIM Claim

What you do in the days after an accident with an uninsured or underinsured driver affects the strength of your claim. These are the steps that matter most:

1. Get the police report. Document the other driver’s lack of insurance at the scene. If they fled or cannot produce proof of insurance, note it in your account to police.
2. Notify your own insurer promptly. Most policies require timely notice. A delay can give your insurer grounds to dispute coverage.
3. Seek medical attention and follow through. Gaps in treatment allow insurers to argue your injuries were not serious or were caused by something else.
4. Document every expense. Medical bills, pharmacy receipts, lost wages, transportation costs. Your insurer will request all of it.
5. Do not give a recorded statement without counsel. Adjusters ask questions designed to minimize your claim. Recorded statements made before you have legal advice can be used against you.
6. Do not accept a fast settlement. Early offers rarely reflect the full value of a UM or UIM claim. The full picture of your injuries and losses often is not clear for weeks or months.

Understanding the Value of Your UM or UIM Claim

Case value in UM and UIM claims depends on your injuries, medical costs, lost income, whether your injuries are permanent, and how close your insurer’s limits are to your actual damages. Our personal injury calculator can help you develop an initial estimate. It is a starting point, not a substitute for a legal review of your specific facts, but it gives you a number to anchor the conversation.

Frequently Asked Questions

What does uninsured motorist coverage pay for?

UM coverage pays for your medical expenses, lost wages, pain and suffering, and property damage when you are hit by a driver who has no insurance or, in a hit-and-run, cannot be identified. Coverage amounts are capped at your own UM policy limits.

Do I have to sue my own insurance company for a UM claim?

Not necessarily. Most UM and UIM disputes are resolved through negotiation or mandatory arbitration under your policy terms, not through a lawsuit against your insurer. However, if your insurer acts in bad faith, separate legal action may become appropriate. An attorney can assess which avenue fits your situation.

How much UM coverage do I need in California?

California’s minimum required UM coverage mirrors the state’s liability minimums: $15,000 per person and $30,000 per accident for bodily injury [2]. Most attorneys recommend carrying significantly higher limits, particularly in Los Angeles where serious accidents are common and medical costs are high. A realistic recommendation is $100,000 per person or more, if your budget allows.

What if the at-fault driver has minimal insurance?

If the at-fault driver’s liability limits are too low to cover your losses, your UIM coverage applies. Your insurer pays the difference between what the at-fault driver’s policy pays and your own UIM limits. You may be required to exhaust the at-fault driver’s policy before your UIM coverage kicks in, which is another reason having an attorney manage the sequencing of claims matters.

Can I stack UM coverage in California?

California generally prohibits inter-policy stacking (combining limits across multiple separate policies). Intra-policy stacking within a single multi-vehicle policy may be available depending on your specific policy language and when it was issued. This is a question your attorney should evaluate before you accept any coverage determination from your insurer.

Your Coverage Exists for Exactly This Situation. We Make Sure It Works.

You paid for UM and UIM coverage. When a driver with no insurance or inadequate coverage hits you, that policy is supposed to protect you. The problem is that your insurer has the same financial incentive to minimize your claim that any other insurance company does.

Haffner Law knows how these claims are handled, where insurers apply pressure, and how to hold them accountable when they do not honor what you paid for.

Contact Haffner Law for a free consultation. Call (213) 514-5681 or schedule online here.

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