A serious car accident can become even more complicated when the driver who caused it has no insurance or does not carry enough coverage. In New York, uninsured motorist coverage or supplementary uninsured/underinsured motorist coverage may allow an injured person to seek compensation through an applicable automobile insurance policy, including, in some cases, the policy covering the occupied vehicle or the injured person’s own policy.
That does not make payment automatic. These claims, generally called UM or SUM claims in New York, can lead to disputes over fault, injuries, damages, coverage limits, notice requirements, and compliance with the insurance contract. Decisions made while pursuing compensation from the other driver can also affect whether SUM benefits remain available later.
Key Takeaways About Filing an Uninsured or Underinsured Motorist Claim in New York
- UM coverage may apply when a negligent driver is uninsured or falls within another category covered by the policy.
- A claim involving an unidentified hit-and-run vehicle generally requires physical contact and prompt reporting.
- SUM coverage may apply when the responsible vehicle’s bodily-injury liability limits are lower than the limits under the injured person’s applicable policy.
- New York has specific rules governing which policy applies first when more than one policy may provide coverage.
- Written notice of a potential UM or SUM claim should be provided as soon as practicable.
- Settling with an at-fault driver without following the SUM endorsement’s notice and release procedures can jeopardize coverage.
- Available compensation depends on the claimant’s damages, policy limits, applicable offsets, and compliance with policy conditions.
When Can You File a UM or SUM Claim After a New York Car Accident?
Uninsured motorist and underinsured motorist claims arise under different circumstances.
An uninsured motorist claim may be available when the responsible vehicle has no applicable bodily-injury liability insurance. New York law also treats certain other vehicles as uninsured, including some stolen, unregistered, or nonpermissively operated vehicles and vehicles for which the liability insurer denies coverage or becomes insolvent.
A UM claim may also arise from a hit-and-run involving an unidentified vehicle. In New York, however, these claims generally require physical contact between the unidentified vehicle and the injured person or the vehicle the person occupied. The prescribed SUM endorsement also requires the accident to be reported to the police or another designated official within 24 hours or as soon as reasonably possible, followed by a sworn statement to the insurance company. A crash caused by an unidentified vehicle that never makes physical contact may not qualify.
An underinsured motorist claim works differently. Under New York Insurance Law § 3420(f), an underinsured vehicle may qualify when its applicable bodily-injury liability limits are lower than the bodily-injury liability limits under the injured person’s applicable policy. A claim’s value exceeding the at-fault driver’s limits does not, by itself, establish eligibility for SUM benefits.
Even when the other vehicle qualifies as underinsured, the amount recoverable depends on the purchased SUM limits, liability payments already received, the claimant’s proven damages, and the policy’s remaining terms and conditions.
Which Insurance Policy Applies to a New York UM or SUM Claim?
A UM or SUM claim does not necessarily proceed through the injured person’s own individual policy. Coverage may be available through the policy covering the vehicle the person occupied, a household policy, an employer’s policy, or another applicable automobile policy.
An attorney evaluating potential coverage will typically examine several related questions:
- Which policies may cover the accident or the injured person?
- Does the injured person qualify as an insured under each policy?
- What bodily-injury liability coverage applies to the responsible vehicle?
- What UM or SUM limits appear in each potentially applicable policy?
- Which policy has priority under New York’s coverage rules?
- What offsets, exclusions, notice provisions, settlement requirements, and arbitration terms apply?
Under New York’s prescribed SUM endorsement, the policy covering the vehicle occupied by the injured person generally has first priority. Next is a policy covering another vehicle under which the injured person is a named insured, followed by a policy under which the person qualifies as an insured but is not a named insured.
Lower-priority coverage generally applies only to the extent that its limits exceed the higher-priority coverage. UM and SUM limits ordinarily cannot be stacked simply because multiple vehicles, policies, insured people, or premiums are involved.
How Do SUM Limits and Offsets Affect the Claim?
Filing against an applicable SUM policy does not mean the insurer simply pays whatever damages remain after the other driver’s coverage is exhausted.
The prescribed endorsement generally calculates the SUM carrier’s maximum payment by subtracting bodily-injury liability payments made by or on behalf of legally responsible parties from the applicable SUM limits. The insurer’s payment also cannot exceed the claimant’s proven damages.
For example, if an applicable policy provides $100,000 in SUM coverage and the claimant receives $25,000 in bodily-injury liability payments, the maximum potentially available through SUM coverage may be $75,000. That does not guarantee a $75,000 payment. The claimant must still prove liability, causation, damages, coverage, and compliance with the policy.
Policy limits can become especially important after a catastrophic injury. Someone with substantial losses may discover that the responsible driver’s liability coverage represents only a fraction of those losses. Reviewing UM and SUM limits before an accident can help drivers understand what protection they have if they are seriously injured by someone with little or no insurance.
What Evidence Helps Support a New York UM or SUM Claim?
A UM or SUM claim still begins with the underlying accident. The insurance company is generally entitled to evaluate whether another driver was legally responsible and whether the evidence supports the amount being demanded. Purchasing the coverage does not prevent the carrier from contesting liability, causation, or damages.
Police reports, photographs, videos, witness statements, vehicle damage, electronic data, and other accident evidence may help establish how the crash happened. Preserving that evidence early can be especially important when fault is disputed.
Medical documentation is equally important. Under New York Insurance Law § 5102(d), a person seeking compensation for pain and suffering or another noneconomic loss arising from a motor vehicle accident in New York generally must satisfy the state’s serious injury threshold. Medical records should document objective findings, treatment, physical limitations, prognosis, and the connection between the accident and the claimed injuries.
Significant treatment gaps, prior injuries involving the same body part, inconsistent medical histories, missed appointments, or records that do not support the claimed limitations can create causation disputes. These issues do not necessarily defeat a legitimate claim, but they can affect how the insurer evaluates it.
Notice Requirements Can Affect a UM or SUM Claim
One of the most avoidable problems in these cases is waiting too long to notify the insurance company that UM or SUM coverage may be needed. New York’s prescribed SUM endorsement generally requires the insured or other person making the claim to provide written notice as soon as practicable.
The claimant may also be required to provide sworn proof of the claim, submit to an examination under oath, attend reasonably requested medical examinations, authorize access to relevant medical records, and promptly forward legal papers from a lawsuit involving the accident.
These requirements differ from New York’s no-fault process. A person seeking no-fault benefits generally must provide written notice within 30 days of the accident unless there is a qualifying justification for the delay. One accident can therefore produce separate claims with different deadlines and procedural requirements.
Early notice is usually the safer approach. A claimant does not need to wait until every medical consequence is known before alerting the carrier to a potential UM or SUM claim. If the responsible driver’s coverage is uncertain or appears inadequate, prompt notice may prevent a later dispute over whether the claim was reported on time.
Settling With the Other Driver Can Put SUM Benefits at Risk
Underinsured motorist claims require particular care when the at-fault driver’s liability carrier offers its policy limits. Accepting the settlement may seem like the obvious next step, but signing a release without addressing the SUM carrier’s rights can create a serious coverage problem.
New York’s prescribed SUM endorsement establishes a procedure for certain policy-limit settlements. After receiving a tentative settlement offer for the negligent party’s available bodily-injury liability limit, the insured should provide written notice to the SUM carrier. The endorsement generally permits the insured to execute a release after 30 calendar days from the carrier’s receipt of that notice unless the carrier advances the proposed settlement amount to preserve its rights against the responsible party.
An insured generally may not otherwise settle with a negligent party without the SUM carrier’s written consent when doing so would impair the carrier’s rights. In a 2026 decision, Matter of Kemper Independent Insurance Co. v. Brown, a New York appellate court upheld the loss of SUM arbitration rights after a claimant signed a release without notifying the SUM carrier or obtaining the required consent.
The settlement with the negligent driver and the SUM claim are therefore closely connected. Resolving the liability claim without following the applicable policy requirements can eliminate or significantly complicate the SUM claim.
What Compensation May Be Available Through UM or SUM Coverage?
The value of a UM or SUM claim depends on the damages caused by the accident, subject to the insurance contract, available limits, offsets, and exclusions. A large policy does not guarantee a large recovery. The claimant must still establish fault, injury causation, and the value of the resulting losses.
Depending on the circumstances, damages may include economic losses exceeding or falling outside applicable no-fault benefits, such as qualifying medical expenses, lost earnings, and diminished earning capacity. Compensation may also be available for pain and suffering and other noneconomic losses when the claimant satisfies New York’s serious injury requirement.
SUM coverage generally does not duplicate amounts recovered or recoverable through no-fault benefits, workers’ compensation, disability benefits, medical-payments coverage, or certain other sources.
Insurers may dispute whether all claimed medical problems were caused by the crash. Preexisting degenerative conditions, earlier accidents, delayed treatment, and competing medical explanations can become central issues. A well-supported claim connects objective medical evidence, physical limitations, employment consequences, and long-term prognosis into one consistent damages presentation.
How Long Do You Have to Pursue a UM or SUM Claim in New York?
Different deadlines may govern different parts of the case. A personal injury lawsuit against a negligent driver is generally subject to a three-year statute of limitations, although substantially shorter deadlines can apply to claims involving government entities. Contractual notice obligations may require action much sooner.
A demand for UM or SUM arbitration is generally subject to a six-year contractual limitations period, but the date that period begins can depend on the type of claim and when the right to payment accrued.
For example, in Matter of Liberty Mutual Insurance Co. v. Pascarella, a New York appellate court concluded that the claimant’s underinsured motorist claim accrued, at the latest, when she accepted and cashed the at-fault insurer’s policy-limit settlement check. Her arbitration demand, made more than six years later, was untimely.
Claimants should not treat a potentially longer contractual limitations period as permission to delay. Written notice, hit-and-run reporting, no-fault applications, lawsuits against responsible parties, and settlement notices may all have earlier deadlines.
What Mistakes Can Hurt an Uninsured Motorist Claim?
Some of the most damaging mistakes occur before negotiations over compensation begin. Failing to report a potential claim promptly can create a coverage defense. Signing a release without following the SUM settlement requirements can be even more consequential.
Claimants may also underestimate the significance of communications with an applicable insurance carrier. The carrier may investigate coverage, liability, causation, and damages. Recorded statements, examinations under oath, medical examinations, authorizations, and document requests can affect the claim and should not be treated as inconsequential paperwork. The carrier’s requests must still be evaluated under the policy and applicable law.
Another mistake is assuming the other driver’s stated insurance limits represent the entire coverage picture. An attorney may investigate whether additional vehicle owners, employers, commercial policies, umbrella policies, household policies, or other legally responsible parties affect the compensation available. Proceeding directly into a SUM claim without completing that investigation could leave other coverage undiscovered.
How a New York Car Accident Lawyer Can Help With a UM or SUM Claim
A well-handled UM or SUM claim requires more than submitting medical bills to an insurance company. An attorney may investigate the underlying collision, identify applicable liability coverage, interpret the relevant policies, determine coverage priority, protect contractual rights, document damages, and respond to defenses raised by the insurer.
These claims may also proceed differently from a conventional lawsuit against an at-fault driver. Depending on the policy and the nature of the dispute, arbitration or court proceedings may become necessary. An insurer may challenge whether coverage exists before the parties ever reach the value of the injury claim.
Experienced representation can be especially valuable when the at-fault driver’s carrier offers its limits. That is often the point when settlement decisions can directly affect SUM rights. Coordinating both claims allows an attorney to pursue available liability insurance while preserving additional coverage that may significantly increase the compensation available to the client.
Need Legal Help? Brandon J. Broderick, Attorney at Law Is One Phone Call Away
Being injured by an uninsured or underinsured driver does not necessarily mean that compensation is limited to the insurance carried by that driver. An applicable policy may provide important additional protection, but New York UM and SUM claims involve coverage priority, notice rules, policy conditions, settlement procedures, offsets, and deadlines that can determine whether benefits are available.
Brandon J. Broderick, Attorney at Law can investigate the accident, identify potentially applicable insurance, preserve your rights under the relevant policies, and pursue compensation supported by your injuries and losses. Getting legal guidance before accepting a liability settlement or signing a release can be especially important when SUM coverage may become part of the claim.