What Is Uninsured Motorist Coverage? Michigan UM/UIM Guide

Uninsured motorist coverage is protection you buy for yourself when the driver who hits you doesn’t carry insurance. Underinsured motorist coverage kicks in when the at‑fault driver has insurance, but not enough to cover your medical bills, lost wages, and other losses. Instead of chasing a dead‑end policy—or a driver who disappears after a hit‑and‑run—UM/UIM lets you make a claim under your own auto policy so you’re not left paying the price for someone else’s choices.

This Michigan‑focused guide explains how UM/UIM fits into our no‑fault system, what it does and doesn’t pay for, and when each coverage applies. You’ll learn whether UM/UIM is required in Michigan, how much to buy, how it compares to collision, PIP, and the mini‑tort, and what to do after a crash with an uninsured or underinsured driver. We’ll flag deadlines and common pitfalls, cover special situations, and outline how a Macomb County injury lawyer can help protect your claim. Let’s get started.

How uninsured and underinsured motorist coverage fits into Michigan’s no-fault system

Michigan’s no-fault rules mean you first use your own policy’s Personal Injury Protection (PIP) for medical bills and wage loss, no matter who caused the crash. UM/UIM doesn’t replace PIP—it steps in when the at‑fault driver has no insurance or not enough, and you have losses PIP won’t fully address.

Think of UM/UIM as your safety net for injuries and other covered damages caused by an uninsured, underinsured, or hit‑and‑run driver. You make the claim with your insurer, which essentially “stands in” for the at‑fault driver and pays up to your UM/UIM limits for covered harms that go beyond your basic no‑fault benefits.

What UM/UIM pays for in Michigan

When an uninsured, underinsured, or hit‑and‑run driver injures you, UM/UIM steps in to cover losses PIP doesn’t fully address. It’s typically written to protect you and your passengers for bodily injury, and—depending on your policy—may also include a property damage component (UMPD). Your own insurer “stands in” for the at‑fault driver and pays up to your UM/UIM limits.

• Medical bills beyond PIP: Treatment costs after PIP limits or exclusions.
• Lost income beyond PIP: Wage loss that PIP doesn’t cover.
• Pain and suffering: Non‑economic damages you could have claimed from the at‑fault driver.
• Passengers covered: Injuries to your passengers under your UM/UIM limits.
• Vehicle damage (if UMPD applies): Repairs, rental, or diminished value; note some states require a deductible for UMPD, while UMBI generally has none.

What UM/UIM does not cover (and what covers those gaps)

UM/UIM isn’t a catch‑all. In Michigan’s no‑fault setup, PIP is primary; UM/UIM fills specific gaps when the other driver lacks insurance. Here’s what it won’t do—and which coverage usually steps in.

• If you’re at fault: UM/UIM doesn’t apply. Your PIP, collision, and bodily injury liability coverages respond.
• Fixing your car under UMBI: UMBI won’t repair your vehicle. Without UMPD on your policy, you need collision; in some states UMPD excludes hit‑and‑run, so collision is required.
• The other driver’s losses: UM/UIM won’t pay their injuries or car—your liability coverage does.
• PIP‑covered items: UM/UIM typically applies only after PIP is exhausted or doesn’t apply.

Uninsured versus underinsured: when each one applies

Both are first‑party protections on your policy, but they trigger under different facts. After your PIP benefits, you pursue the at‑fault driver’s liability insurance; if that’s missing or not enough, your UM/UIM steps in to close the gap up to your limits.

• Uninsured (UM) applies when: The at‑fault driver has no active policy, a lapsed/denied policy, an excluded driver situation, or can’t be identified after a crash. Your insurer “stands in” for the at‑fault driver for covered bodily injury (and UMPD, if purchased).
• Underinsured (UIM) applies when: The at‑fault driver’s liability limits are too low to cover your damages; you collect their limits first, then your UIM pays the shortfall up to your UIM limits.

Hit-and-run claims under UM in Michigan

A hit-and-run is exactly what uninsured motorist coverage is designed for: when the at‑fault driver flees or can’t be identified, you can make a UM claim with your own insurer for your injuries. Major carriers confirm UM generally covers hit-and-run injuries; however, property damage under UMPD may not cover hit-and-run in some states and policies, so you may need collision coverage for your vehicle repairs. Check your policy language and act fast—notice and proof requirements can be strict.

• Call 911: Get a police report.
• Document everything: Photos, debris, skid marks, injuries.
• Find evidence: Witness names and any nearby camera footage.
• Get treatment: Prompt care and keep records.
• Notify your insurer ASAP: Follow policy timelines; avoid recorded statements or releases until you get legal guidance.

Is UM/UIM required in Michigan?

No. Michigan law doesn’t require uninsured or underinsured motorist coverage; it’s an optional add‑on you must choose and pay for. While many states mandate at least one of these coverages, Michigan drivers only get UM/UIM if they elect it. Insurers may offer UM/UIM separately or bundled (often with bodily injury as the core). Check your declarations page for UM/UIM limits—if you don’t see them, ask your agent to add the protection.

How much UM/UIM coverage should you carry?

The worst time to find out your limits are too low is after a serious crash. A simple way to right‑size uninsured motorist coverage is to build it around the risks you can’t control: other drivers’ missing or minimal insurance, hit‑and‑runs, and losses PIP won’t fully cover. Pick limits that mirror what you’d want from the at‑fault driver—then make sure your own policy can deliver it.

• Match your liability limits: A common benchmark is to set UM/UIM bodily injury equal to your liability limits. Example: if you carry $50,000/$100,000, consider the same for UM/UIM.
• Plan for PIP gaps: Choose limits high enough to address medical bills and wage loss that exceed or fall outside your PIP benefits, plus pain and suffering.
• Protect your passengers: UM/UIM can cover injuries to people riding with you; higher per‑accident limits help when multiple people are hurt.
• If you skip collision, consider UMPD: Set uninsured motorist property damage close to your car’s value. Note some policies/states require a UMPD deductible, and hit‑and‑run property damage may be excluded—collision will still cover your car regardless of fault.
• Think realistically about exposure: Long commutes, teen drivers, and frequent highway travel are reasons to choose higher limits.

UM/UIM vs collision, PIP, and the mini‑tort in Michigan

Each coverage plays a different role in Michigan’s no‑fault system. PIP is your first stop for medical and wage loss no matter who caused the crash. UM/UIM is your backstop when the at‑fault driver has no insurance or not enough, and you have injury losses PIP doesn’t fully cover. Collision and the mini‑tort deal with property damage, not pain and suffering.

• PIP (primary): Pays medical and wage loss regardless of fault; not for pain and suffering.
• Collision (your car): Repairs your vehicle no matter who’s at fault; deductible applies.
• UM/UIM (their fault, no/low insurance): Covers injury damages beyond PIP; UMBI typically no deductible; UMPD may have one and may exclude hit‑and‑run in some states/policies.
• Mini‑tort (limited property claim): Lets you seek a small amount from the at‑fault driver for vehicle damage; property‑only and capped by law.

What to do after a crash with an uninsured or underinsured driver

After any crash, put safety first and call for help. In Michigan, PIP is primary, but protecting a UM/UIM claim starts at the scene. Act quickly to secure proof, document injuries, and keep your options open with your insurer.

• Call 911 and get a police report: Your insurer will ask for it on UM claims.
• Exchange information: If the other driver is uninsured, document the driver, plate, and VIN.
• Document the scene: Photograph damage and injuries; note witnesses and nearby cameras.
• Get prompt medical care: Follow treatment and save all bills and records.
• Notify your insurer quickly: Report the crash and flag a potential UM/UIM claim.
• Avoid harmful statements: Don’t give recorded statements or sign releases before legal advice.

Deadlines, notice requirements, and mistakes that can sink a UM/UIM claim

UM/UIM claims are driven by your insurance contract. Policies often require prompt written notice, a timely police report for hit‑and‑run claims, and cooperation with your insurer’s investigation. UIM claims typically assume you’ve pursued the at‑fault driver’s liability limits first. Contractual deadlines and the broader statute of limitations can both apply—missing either can derail a valid claim.

• Late notice or no police report: Delays can give your insurer a reason to deny a UM hit‑and‑run claim.
• Settling without consent: Resolving with the at‑fault insurer before your carrier approves can forfeit UIM rights.
• Not preserving evidence: Fixing your car before inspection or losing witness info weakens proof.
• Gaps in treatment/documentation: Missed appointments or thin records invite disputes over injury and causation.
• Recorded statements/releases too early: Broad authorizations or statements can be used to minimize your claim.

Do you need UM/UIM if you have health insurance or “full coverage”?

Yes—because “full coverage” usually means liability plus collision and comprehensive, which won’t pay your injury damages when the other driver has no or too little insurance. Health insurance and PIP help with medical bills, but they don’t cover pain and suffering and often won’t replace all lost wages. UM/UIM fills those gaps, protects your passengers, and covers hit‑and‑run injuries. UMBI/UIMBI generally have no deductible, giving you cleaner access to benefits when you need them most.

Special situations: passengers, pedestrians, bicyclists, and out‑of‑state crashes

UM/UIM is meant to protect people, not just drivers, and it often follows you beyond your own vehicle. Exact rights depend on your policy and state law, so act fast and document everything. Remember: UM generally covers hit‑and‑run injuries, while UMPD may exclude hit‑and‑run in some places.

• Passengers: Your UM/UIM can cover riders; passengers may also claim under the host vehicle’s policy.
• Pedestrians: If struck by an uninsured or hit‑and‑run driver, UM may apply for injuries.
• Bicyclists: Similar to pedestrians—UM/UIM can address injury losses.
• Out‑of‑state crashes: Coverage can apply, but policy terms and state rules control.

How a Macomb County injury lawyer can help with UM/UIM claims

A Macomb County injury lawyer who knows Michigan no‑fault and the way local insurers handle UM/UIM claims can turn confusion into a plan. We read the fine print, meet deadlines, and protect your rights while you focus on healing—especially after hit‑and‑runs and low‑limit policies.

• Policy audit: Confirm UM/UIM and UMPD, notice deadlines, and police‑report requirements.
• Claim protection: Manage insurer communications, avoid consent‑to‑settle traps, and preserve evidence.
• Proving damages: Document medical care, wage loss, and pain and suffering; negotiate or litigate when needed.
• Risk‑free help: No Fee Unless We Win, with a free consult before you speak to an adjuster.

Key takeaways and next steps

UM/UIM is your Michigan safety net when an at‑fault driver has no or too little insurance. PIP pays first, collision fixes cars, but UM/UIM covers injury losses PIP doesn’t, including many hit‑and‑runs. It’s optional—yet crucial—and time‑sensitive.

• Match limits: Align UM/UIM with your liability limits.
• Protect your car: Add UMPD or carry collision for repairs.
• Act fast: Report promptly and get a police report.
• Avoid traps: Don’t settle third‑party claims without your insurer’s okay.

Questions or a new claim? Contact Macomb Injury Lawyers for a free, no‑obligation review—No Fee Unless We Win.