The claim still depends on the other driver's legal responsibility
Uninsured and underinsured motorist coverage is first-party insurance, but it does not automatically pay because the other driver lacks adequate coverage. You generally must be legally entitled to recover from the responsible driver. Fault, causation, and the extent of bodily injury can therefore remain disputed even though the claim is presented to an insurer that issued a policy covering you.
Your insurer may evaluate the collision and injury much as the other driver's liability insurer would. It can dispute who caused the incident, whether another person shares responsibility, and whether the claimed harm resulted from the collision. California's comparative-fault rules may also affect the amount that can be recovered under the applicable coverage.
- Other vehicle
- No applicable bodily injury coverage, denied coverage, or a qualifying unknown vehicle.
- Primary issue
- Whether you are insured and the event fits California's UM requirements.
- Claim path
- Agreement with your insurer or arbitration if fault or damages remain disputed.
- Other vehicle
- Insured, but with limits below the applicable UIM limit.
- Primary issue
- Exhaustion of all applicable liability limits and the statutory offset.
- Claim path
- UIM review after required liability payments are completed and documented.
UM and UIM follow different coverage paths
An uninsured motorist path may apply when no bodily injury liability insurance covers the responsible vehicle or when coverage is denied under circumstances recognized by California law. An underinsured motorist path generally applies only after the liability limits covering all responsible insured vehicles have been exhausted by judgment or settlement and proof of payment is supplied to the UIM insurer.
California generally does not permit the available UM or UIM limits from several vehicles or policies to be added together to create a larger combined limit. Other applicable coverage may instead be coordinated or prorated under the policy and statute. The amount shown on a declarations page is therefore a starting point, not a determination of the benefits available for a particular injury.
Agreement or arbitration may decide the dispute
California's statutory framework provides that entitlement to recover and the amount of damages are determined by agreement or, if the insured and insurer disagree, by arbitration before a single neutral arbitrator. Arbitration is different from an ordinary jury trial, although formal discovery procedures may still be available. Coverage questions themselves may require separate court consideration depending on the dispute.
A settlement with a responsible party can affect the insurer's reimbursement or subrogation rights. Some policies and statutory provisions also make consent important before resolving a claim against a person who may be legally responsible. If you are considering a settlement, the interaction with UM or UIM coverage should be understood before rights are released.
The statutory deadline includes a required action
Insurance Code § 11580.2 generally requires one of specified actions within two years of the accident: filing a bodily injury lawsuit against the uninsured motorist, reaching agreement on the amount due, or formally instituting arbitration through the required written notice. Simply opening a claim or exchanging communications may not satisfy that statutory requirement.
Unknown-driver incidents have additional contact and reporting conditions, while UIM claims have exhaustion requirements. Workers' compensation can also affect timing and credits. Because the correct path depends on the type of responsible vehicle, every potentially applicable policy, and what has already occurred, confirm the steps and dates that govern your circumstances rather than relying on a general claim deadline.