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Castle Rock Uninsured and Underinsured Motorist Lawyer

One in six Colorado drivers has no insurance. If one of them hits you, your own policy may be your only lifeline.

This page explains how uninsured and underinsured motorist coverage works in Colorado, what your legal rights are when the other driver cannot pay, and how Rampart Injury Lawyers fights your own insurance company to get the money that coverage was designed to deliver.

You did everything right. You followed all the rules and bought insurance like you are supposed to. And then someone without a dollar of coverage ran a red light or otherwise drove negligently. Worse yet, now the at-fault driver has no insurance, no assets, and no ability to pay a dime toward your medical bills.

Or maybe the other driver does have insurance. The state minimum. That $25,000 policy could be gone after your first surgery if you need it, and you still have six months of physical therapy ahead of you. The bills keep coming. The at-fault driver’s policy is empty. And you’re wondering who is supposed to pay the rest.

The answer might be sitting in your own glovebox or online. It depends on decisions you made when you bought your insurance policy, not even thinking that you may need it one day.

Colorado ranks 9th worst in the nation for uninsured drivers, with an estimated 17.5% of motorists carrying zero coverage, according to (CPR News, December 2024). Under C.R.S. § 10-4-609, every auto insurer writing policies in Colorado must offer uninsured motorist and underinsured motorist coverage. If the insured does not reject this coverage in writing, it attaches to the policy at an amount equal to the insured’s liability limits. Colorado’s minimum liability limits are just $25,000 per person and $50,000 per accident under C.R.S. § 10-4-619. When those limits run out, UM/UIM coverage is the difference between full recovery and financial ruin.

Uninsured vs. Underinsured: Two Problems, One Statute

Colorado bundles both protections under a single statute: C.R.S. § 10-4-609. The distinction matters because the claims process differs depending on which category applies to your crash.

  • Uninsured Motorist Coverage

    Uninsured motorist coverage kicks in when the at-fault driver has no liability insurance at all. It also applies when the at-fault driver is a hit-and-run phantom vehicle who cannot be identified. Under Section 10-4-609(6), a driver who cannot be located for service of process after a reasonable attempt is deemed uninsured for purposes of your UM claim. This is why UM coverage is so critical after a hit and run. If the other driver disappears, your UM policy steps into the shoes of the missing driver’s nonexistent insurance.

  • Underinsured Motorist Coverage

    Underinsured motorist coverage applies when the at-fault driver has an insurance policy, but the limit of that policy is less than the amount owed for injuries suffered in the accident. According to Colorado Statute Section 10-4-609(4), an underinsured motor vehicle is a vehicle that is insured or bonded for bodily injury at the time of the accident, and the limits of the insurance policy are less than the amount needed to pay in full for your damages. Your UIM policy will pay the remaining amount due for damages from the accident, up to the limits of your UIM policy.

  • The Bucket Analogy

    An analogy we use at Rampart Injury Lawyers to explain this is a bucket catching water. The first bucket that is supposed to catch the water, your damages, is the at-fault driver’s insurance. However, if that does not exist or is not enough and overflows, your own insurance policy through UM or UIM coverage acts as a second bucket. The goal is to make sure between all of the buckets of insurance, however they stack in a case, they are enough to catch all the water, meaning all of your damages.

Colorado’s Minimum Coverage Problem

Colorado law requires every driver to carry liability insurance of at least $25,000 per person, $50,000 per accident, and $15,000 in property damage under C.R.S. § 10-4-619. Those numbers have not kept up with the cost of medical care. A single ambulance ride in the Denver metro can cost thousands. One night in the ICU at UCHealth or Centura may run tens of thousands before a single procedure is performed. And a spinal cord or other critical surgery can cost hundreds of thousands or even millions.

A driver carrying the state minimum $25,000 policy is technically insured. But if your injuries cost $250,000, that policy covers ten cents on the dollar. The remaining $225,000? Without UIM coverage, that gap falls on you.

According to a 2025 Insurance Research Council report, one in three drivers nationally was either uninsured or underinsured in 2023. Colorado saw the largest increase in UIM rates in the entire country, a 24.4 percentage-point jump. That means even if the other driver has a policy, the odds that it covers your full losses are dropping every year.

How UM/UIM Coverage Works in Colorado

Under C.R.S. § 10-4-609, every auto insurer in Colorado must offer UM/UIM coverage before issuing or renewing a policy. The insurer must offer coverage up to the insured’s own bodily injury liability limits. If you carry $100,000/$300,000 in liability, you can purchase UM/UIM at the same level. The insurer cannot force you to take less.

If you do not reject UM/UIM in writing, the coverage attaches at statutory minimums of $25,000/$50,000. Here is the catch: that rejection only has to happen once. After the initial selection, the insurer is not required to ask again at renewal under Section 10-4-609(3). So if you declined UM/UIM coverage fifteen years ago when you signed up, and you have been renewing the same policy ever since, you may still have no UM/UIM coverage today. It is a one-time decision with permanent consequences.

  • What UM/UIM Covers

    Medical expenses, lost wages, pain and suffering, loss of enjoyment of life, disfigurement, and any other damages you would be legally entitled to collect from the at-fault driver if they had adequate insurance.

  • What UM/UIM Does Not Cover

    Property damage to your vehicle. That is governed separately under C.R.S. § 10-4-610. UM/UIM in Colorado applies to bodily injury only.

Stacking: When Multiple Policies Multiply Your Coverage

Stacking is one of the most misunderstood and most valuable features of Colorado UM/UIM law. Under the Colorado Supreme Court’s ruling in DeHerrera v. Sentry Insurance Company, 30 P.3d 167 (Colo. 2001), UM/UIM benefits follow the person, not the vehicle. The Court held that one premium is sufficient to cover an entire family, and insurers cannot use anti-stacking provisions to reduce the coverage below what the statute requires.

So in practice what this ultimately means for you is that if you have two vehicles on your policy, each with $100,000 in UM/UIM coverage, you may be able to stack those limits to $200,000. If your spouse has a separate policy with $100,000 in UM/UIM and you are a resident relative, you may access that policy too. The total available coverage can far exceed what any single policy shows on its declarations page.

Insurance companies fought hard against this type of stacking and they largely lost. The Colorado legislature and courts have made clear that UM/UIM is designed to protect people, not insurer profit margins. If your insurer tries to tell you that your coverage is limited to a single vehicle’s limits, get a lawyer involved. That answer may be wrong.

Filing a UM/UIM Claim: When Your Own Insurance Company Becomes the Opponent

The biggest surprise when you file a UM/UIM claim is that you are filing a claim against the same company you pay premiums to each year. It is the same entity, but their financial interest changes the minute you file the claim. Now, the company you paid premiums to for years is the one that has to write the check.

Consider a coworker you thought was working for your benefit, yet after an assignment, they are required to be an adversary against you. Same coworker. Same company. However, different interests. After you file your claim, your insurance company will investigate your accident, assess the extent of your injury, and decide what they believe your claim is worth.

If the amount they believe your claim is worth is less than what you feel your claim is worth, you can either accept their evaluation or take action to contest it.

  • Step 1: Pursue the At-Fault Driver’s Liability Limits

    For UIM claims, before your UIM coverage activates, you do not need to resolve the claim against the at-fault driver’s insurer first. In Colorado you can access UIM even before the at-fault policy is exhausted. However, it is very important to be careful here. Most UIM policies contain a consent-to-settle clause that requires you to get your own insurer’s written permission before accepting the at-fault driver’s policy limits. If you make a mistake and settle without that permission, your insurer may deny your UIM claim entirely.

  • Step 2: File the UM/UIM Claim with Your Own Insurer

    Provide timely notice and submit documentation of your injuries, medical records, lost wages, and other damages to your own UM/UIM carrier as soon as you have reason to believe the other driver has no insurance or not enough. Your insurer will assign an adjuster who now evaluates your claim from the other side of the table.

When Your Insurer Refuses to Pay: Bad Faith Under Colorado Law

Colorado has strong bad faith insurance protections ingrained in its legal system. Under C.R.S. § 10-3-1115, an insurer that unreasonably delays or denies a covered benefit owes the claimant two times the covered benefit plus attorney fees and costs under C.R.S. § 10-3-1116. For example, if your insurer unreasonably refuses to pay a $100,000 UM/UIM claim, the penalty can be $200,000 plus your lawyer’s fees on top.

The legislature created this protection because they knew there was an inherent inequality in your relationship with your insurer. You have paid thousands of dollars over years in premium payments to get the protection that you are paying for. When you finally need the coverage that you paid for, your insurer has every incentive to deny your claim, or at least delay payment, lowball you, or deny you your benefits. This bad faith statute gives you the leverage to ensure that the UM/UIM promise you paid for is enforceable against your insurer.

  • Examples of Bad Faith Conduct

    Some examples of bad faith actions that insurers take when handling UM/UIM claims include unreasonable delays in investigating the claim, asking for excessive information or documentation regarding the injury when there seems to be no need for so much documentation, refusing to consider how stacking applies to your policy, claiming that you do not have coverage when it is clear that you do, and providing a settlement amount that ignores the full extent of your documented medical expenses. When your insurer engages in one of these behaviors, you are likely to experience frustration. But it could also be unlawful.

Hit-and-Run Accidents and UM Coverage

Hit-and-run accidents are usually handled as uninsured motorist claims in Colorado. Under C.R.S. § 10-4-609(6), if the at-fault driver cannot be located for service of process, they are deemed uninsured. Your UM policy is the primary recovery path.

This connection matters because Colorado has a serious hit-and-run problem. When uninsured drivers cause crashes, they have every incentive to flee. They know they have no insurance. They know they face criminal penalties for driving uninsured. So they disappear, and you are left with the aftermath. If you have UM coverage, you have a claim. If you do not, you may have nothing.

UM/UIM and Rideshare Accidents

If you are injured in an Uber or Lyft accident and the at-fault driver is uninsured, the coverage architecture becomes layered. As of August 2022, HB 22-1089 requires TNCs to provide uninsured motorist coverage of at least $200,000 per person and $400,000 per occurrence during prearranged rides. The TNC cannot reject this coverage. Your own UM/UIM policy may also apply on top of the TNC’s coverage, depending on the circumstances.

Why UM/UIM Claims Require a Lawyer

Most car accident claims are against the other driver’s insurance company. The adversarial dynamic is obvious. But UM/UIM claims are different. You are making a claim against the company that prints your name on the policy. The company that cashed your premium checks. The company you have trusted to protect you if you ever needed them.

However, now that company is evaluating your injuries, questioning your treatment, and deciding how much your pain is worth. They have adjusters, defense attorneys, actuarial data, and incentives to make sure they protect their bottom line. That leaves you with a stack of medical bills and a phone that keeps ringing with no end in sight if they do not handle it properly.

Rampart Injury Lawyers prepares every UM/UIM case in detail. Hopefully, the insurance carrier does the right thing and protects the people who have been paying them for UM/UIM insurance, but that is not always guaranteed and you cannot assume it will happen in your case. We identify every available policy, we analyze stacking, we document the full scope of your injuries, and if your insurer acts in bad faith, we file the statutory claim that turns their delay into their liability. We have recovered millions for Colorado families in UM/UIM claims across Colorado and in the I-25 corridor.

Frequently Asked Questions: Uninsured and Underinsured Motorist Claims in Colorado

  • What Is the Difference Between UM and UIM Coverage in Colorado?

    Uninsured motorist coverage applies when the at-fault driver has no insurance at all, or in hit-and-run cases where the driver cannot be identified. Underinsured motorist coverage applies when the at-fault driver has insurance, but the policy limits are not sufficient to cover your damages. Both are governed by C.R.S. § 10-4-609.

  • Is UM/UIM Coverage Required in Colorado?

    No. Colorado law requires insurers to offer UM/UIM coverage, but you can reject it in writing. However, if you do not reject it in writing, coverage attaches at an amount equal to your bodily injury liability limits. Most insurance professionals strongly recommend purchasing UM/UIM at limits equal to your liability coverage.

  • How Much Does UM/UIM Coverage Cost?

    UM/UIM coverage is one of the most affordable additions to an auto policy. The median annual cost nationally for uninsured motorist bodily injury coverage is approximately $50 per year. Given that 17.5% of Colorado drivers are uninsured, it is one of the most cost-effective protections available.

  • Can I Stack UM/UIM Coverage from Multiple Vehicles or Policies?

    Yes, in many cases. The Colorado Supreme Court ruled in DeHerrera v. Sentry Insurance Company, 30 P.3d 167 (Colo. 2001) that UM/UIM benefits follow the person, not the vehicle. If you have multiple vehicles on a policy or access to a household member’s policy, you may be able to stack those limits. An attorney can analyze your specific policies to determine your total available coverage.

  • What Should I Do if Hit by an Uninsured Driver in Colorado?

    When it is safe to do so, call 911 and get a police report. Seek immediate medical treatment if you have any pain or indication of injuries. Do not give a recorded statement to any insurance company before speaking with a lawyer. Notify your own insurer of the crash. Do your best to preserve all evidence, including photos, witness contact information, and your medical records. Then contact a UM/UIM attorney who can identify every available coverage source.

  • Can I Sue the Uninsured Driver Directly?

    You may be able to sue the uninsured driver directly, but collecting on that judgment or even settlement is often difficult. Drivers who cannot afford insurance typically cannot afford to pay a judgment. A UM/UIM claim against your own insurer is almost always the more practical path to compensation. The statute of limitations for personal injury in Colorado is three years under C.R.S. § 13-80-101.

  • What Is the Consent-to-Settle Clause, and Why Does It Matter?

    Consent-to-settle clauses are placed in most UIM policies and require you to get your own insurer’s written permission before settling with the at-fault driver’s insurance company. If you settle the at-fault claim without this consent, your insurer may deny your entire UIM claim. That is why it is always recommended to consult a lawyer before accepting any settlement from the at-fault driver’s carrier.

  • What Happens if My Insurance Company Lowballs My UM/UIM Claim?

    If your insurer unreasonably delays or denies your claim, Colorado’s bad faith statutes, C.R.S. § 10-3-1115 and C.R.S. § 10-3-1116, allow you to recover two times the covered benefit plus attorney fees. An unreasonable lowball offer can trigger bad faith liability.

  • Does UM/UIM Coverage Apply to Hit-and-Run Accidents?

    Yes. Under C.R.S. § 10-4-609(6), if the at-fault driver cannot be located for service of process, they are deemed uninsured for purposes of your UM claim. Hit-and-run victims with UM coverage have a clear path to recovery through their own policy.

  • How Long Do I Have to File a UM/UIM Claim in Colorado?

    The statute of limitations for UM/UIM claims in Colorado is governed by C.R.S. § 13-80-107.5, which provides that the limitations period for a UM/UIM contractual claim runs concurrently with the personal injury statute of limitations. Generally, you have three years from the date of the accident. Evidence fades or disappears over time, witnesses forget what happened, and other documentation you need to support your claim with your insurance becomes harder to acquire over time, so do not wait.

Talk to a Colorado Uninsured Motorist Lawyer Today

You paid your premiums. You trusted that the coverage would be there when you needed it. Now you need it, and your own insurance company is acting like your claim is an inconvenience. That is not how this is supposed to work.

Rampart Injury Lawyers handles UM/UIM claims across Colorado and in particular in the I-25 corridor from Denver to Colorado Springs. We work hard to identify every available policy, analyze stacking, demand full payment from your insurer, and file bad faith claims when they refuse to honor the coverage you paid for. We work on contingency: nothing upfront, nothing out of pocket, and no attorney’s fees unless we recover for you.

Contact us for a free consultation about your uninsured or underinsured motorist claim today at (303) 766-8766.

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