What Is Subrogation After a Massachusetts Car Accident or Injury?

Subrogation is the right of an insurer or benefit plan that paid for your loss to step into your place and collect that money back from the person who caused it, and after a Massachusetts car accident it can come from five different directions at once: your own personal injury protection (PIP) insurer, your collision insurer, your uninsured motorist insurer, a workers’ compensation insurer, and your health plan or MassHealth. Each one runs on its own statute with its own limits. M.G.L. c. 90, sec. 34M says a PIP insurer “shall be subrogated to that exact extent to the rights of any party it pays”. M.G.L. c. 175, sec. 113L(4) says an uninsured motorist insurer takes nothing from your recovery “unless and until” you have “received full compensation”. M.G.L. c. 152, sec. 15 hands a workers’ compensation insurer the recovery up to what it paid and gives you the excess. Knowing which of these applies, and in what order, often decides how much of a settlement actually reaches you.

The word sounds technical, but the idea is simple. You are paid quickly by a company you have a relationship with, and that company later recovers from the party who was at fault, so that the at-fault party, not your insurer, ends up bearing the loss. The complications come from the fact that the person who caused the loss is usually also the person you are trying to recover from, so you and your own insurer end up with claims against the same pot of money.

This page explains what subrogation means, how each Massachusetts subrogation right works, the limits the statutes place on each one, and what to do when a subrogation claim touches your case. It is general information about Massachusetts law, not legal advice about any particular claim.

What Subrogation Means in Plain Terms

Subrogation is substitution. The insurer that paid you is substituted for you, to the extent of what it paid, in your claim against the responsible party. If your collision coverage paid $6,000 to fix your car after another driver ran a red light, your insurer now holds a $6,000 claim against that driver, and in practice against that driver’s property damage liability insurer.

Three ideas follow from that.

First, subrogation is derivative. The insurer has your rights and no better rights. If you could not have recovered from the other driver, because you were more at fault than the other driver or because the other driver is protected by a statutory exemption, your insurer cannot recover either.

Second, the total recovery does not double. Subrogation exists so that you are not paid twice for the same loss, once by your insurer and again by the person at fault. Whatever your insurer recovers through subrogation for an item it already paid is money you were not going to keep for that item anyway.

Third, it can be enforced in two ways. Some insurers sue or make a claim against the responsible party directly. Others assert a lien, which is a claim against the money you recover from the responsible party, so that they are repaid out of your settlement. Health plans and MassHealth usually work the second way. Collision and PIP insurers more often work the first way.

The Five Subrogation Rights a Massachusetts Crash Can Create

Massachusetts did not write one subrogation statute. It wrote one for each kind of benefit, and the differences between them are where people get caught.

1. Your PIP insurer, under c. 90, sec. 34M

Personal injury protection pays up to $8,000 for medical bills, lost wages and replacement services regardless of fault. Section 34M then provides that “any insurer paying benefits in accordance with the provisions of this section shall be subrogated to that exact extent to the rights of any party it pays and may bring an action in tort against any person liable for such damages in tort who is not exempt from said liability as a result of the provisions of this section”.

The phrase “who is not exempt” matters. An insured driver is exempt from tort liability for the losses PIP covers, so a PIP insurer usually cannot sue an insured at-fault driver personally for what it paid. Instead, the same section gives it “the right to make claim for all expenses it incurs on account of such payments, including the net amount of benefits paid, costs of processing claims for any such benefits, and the expenses of enforcing this right, against any other insurer” whose driver would have been liable. If the two insurers cannot agree, the statute sends the dispute to arbitration. You are not a party to that process.

Section 34M also protects you in one sentence that is easy to miss: “no insurer shall reduce or limit the amount of liability insurance otherwise available to an injured person as a result of such subrogation.” Your own PIP insurer’s recovery from the other insurer cannot shrink the bodily injury coverage that is there for your claim.

The driver who is not exempt is a different story. An uninsured at-fault driver has no PIP exemption, so the PIP insurer can sue that driver in tort for what it paid. That situation is covered in detail on what happens if you crash without insurance in Massachusetts.

2. Your collision insurer, under c. 90, sec. 34O

Collision coverage is optional in Massachusetts, and section 34O says its “benefits under this coverage are payable without regard to negligence, comparative negligence, gross negligence or fault of any kind”. The standard deductible written into the statute is $500. Insurers must make available an option reducing it to not less than $300 (an insurer may refuse that option on the basis of accident frequency, claims paid or moving violations), and must make available a $1,000 deductible.

Because your collision insurer pays you regardless of fault, it then pursues the driver who was at fault, usually through that driver’s property damage liability coverage. For policies issued or renewed on or after July 1, 2025, section 34O sets that property damage liability minimum at $30,000 for any one accident.

Limited collision coverage works differently. It pays only in four listed situations: where you are entitled to recover in tort against “another identified person”; where your car was lawfully parked and hit by another identified owner’s vehicle; where you were struck in the rear by a vehicle moving in the same direction; and where the other driver is convicted of operating under the influence, driving the wrong way on a one-way street, or excessive speed. In the first of those cases the statute imposes a duty on you: “the insured, in such a case, shall take all steps necessary to preserve the insurer’s right of subrogation.” In practice that means not signing anything that releases the other driver from property damage claims before your own insurer has been told.

Section 34O also requires insurers to make available an option under which an insured who carries collision or limited collision is paid “without regard to comparative negligence or any deductible” in those four situations, “provided the negligence attributable to such an insured is fifty per cent or less.” Whether you bought that option is on your policy’s coverage selections page.

3. Your uninsured motorist insurer, under c. 175, sec. 113L(4)

Uninsured and underinsured motorist coverage pays your bodily injury damages when the driver at fault has no insurance, cannot be identified, or does not carry enough. When your insurer pays under that coverage, section 113L(4) entitles it “to the proceeds of any settlement or judgment resulting from the exercise of any rights of recovery” you have against the person responsible.

Then comes the most protective sentence in any of these statutes: “the insurer shall not be entitled to any such proceeds unless and until the person insured under the coverage required or elected to be purchased under this section has received full compensation for his injuries”. If your losses are larger than everything available, the uninsured motorist insurer does not get repaid ahead of you. More on how the coverage itself works is on uninsured and underinsured motorist coverage in Massachusetts.

4. A workers’ compensation insurer, under c. 152, sec. 15

If you were hurt in a crash while working, workers’ compensation pays first, and you keep the right to sue the other driver. Section 15 lets “either the employee or insurer” proceed against that person, but the insurer may not do so “unless compensation has been paid” and not “until seven months following the date of such injury”.

The money is then split by formula. “The sum recovered shall be for the benefit of the insurer, unless such sum is greater than that paid by it to the employee, in which event the excess shall be retained by or paid to the employee.” The statute defines excess as “the amount by which the gross sum received in payment for the injury exceeds the compensation paid”. Attorney’s fees are “divided between the insurer and the employee in proportion to the amounts received by them respectively”, so the insurer shares the cost of the lawyer who produced the recovery.

Section 15 also controls settlement. Outside a settlement reached during trial, “no settlement by agreement shall be made with such other person without the approval of either the board, the reviewing board, or the court in which the action has been commenced after a hearing in which both the employee and the insurer have had an opportunity to be heard.” At that hearing the amount of excess that will offset future workers’ compensation benefits is also decided. A side deal with the other driver’s insurer that skips this step is the classic way an injured worker loses future benefits.

5. Your health plan or MassHealth

A health insurer that paid crash-related medical bills will often claim reimbursement from your settlement. Massachusetts limits that claim against PIP specifically: under c. 90, sec. 34A, a health plan may not “recover any amount against the claimant nor shall it be subrogated to the rights of the claimant for more than two thousand dollars of personal injury protection benefits”.

MassHealth is stronger. Under c. 118E, sec. 22(b), a claimant who receives a payment from a liability insurer “shall repay” the medical assistance benefits provided, and under sec. 22(c), if a settlement does not say what portion is for medical expenses, “there shall be a presumption” that it applies first to medical expenses up to the amount MassHealth paid. Subsection (g) makes the benefits a lien once the third party has notice. The full detail, including the notice duties, is on medical liens on an injury settlement in Massachusetts.

Subrogation Rights Compared

Who is claiming	Statute	When it can recover	The main limit
Your PIP insurer	M.G.L. c. 90, sec. 34M	After paying PIP, against a non-exempt person or the at-fault driver’s insurer	Cannot reduce the liability insurance available to you
Your collision insurer	M.G.L. c. 90, sec. 34O	After paying for your car, against the at-fault driver and that driver’s property damage coverage	Only as far as your own claim would succeed, reduced by your share of fault
Your uninsured motorist insurer	M.G.L. c. 175, sec. 113L(4)	From the proceeds of your settlement or judgment	Nothing “unless and until” you have “received full compensation”
A workers’ compensation insurer	M.G.L. c. 152, sec. 15	After paying compensation and seven months from the injury, or from your recovery	You keep the excess, fees are shared, and settlements need approval
A health plan	M.G.L. c. 90, sec. 34A	From your recovery	No more than $2,000 of PIP benefits
MassHealth	M.G.L. c. 118E, sec. 22	From any payment by a liability insurer or other third party	Repayment of benefits paid, with a presumption favouring medical expenses

The table shows why “subrogation” is not one rule. The uninsured motorist insurer waits until you are fully compensated. The workers’ compensation insurer is paid first and you take the excess. The PIP insurer usually recovers from another insurer and never touches your settlement at all.

How Fault Changes What an Insurer Can Recover

Because subrogation is derivative, your share of fault limits your insurer exactly as it would limit you. M.G.L. c. 231, sec. 85 applies comparative negligence to any action for “death or in injury to person or property”. A person whose negligence is “not greater than the total amount of negligence attributable to the person or persons against whom recovery is sought” can still recover, but “any damages allowed shall be diminished in proportion” to that person’s negligence.

So if you were found 30 per cent at fault for a crash, your collision insurer’s subrogation claim for your car is reduced by 30 per cent, just as your own claim for your out-of-pocket loss would be. If you were more at fault than the other driver, neither you nor your insurer recovers from that driver. How fault is allocated is explained on how fault is determined in a Massachusetts car accident.

When Subrogation Is Aimed at You

Subrogation also runs the other way. If you caused the crash, the other driver’s insurers may come after you, and what protects you depends on whether you were insured.

If you were insured, PIP subrogation against you personally is blocked by the tort exemption in section 34M, and the other driver’s PIP insurer makes its claim against your insurer instead. Your property damage liability coverage answers the other driver’s collision insurer up to your policy limit. Above your limits, you can be personally responsible.

If you were not insured, the exemption does not protect you, and the PIP insurer can sue you in tort for what it paid, along with the collision insurer for the car. Those letters are often titled “subrogation demand” and they are real claims, not junk mail. The crash without insurance page explains that exposure.

Steps When a Subrogation Claim Touches Your Case

1. List every payer. Write down every insurer or program that has paid anything because of the crash: PIP, collision, health insurance, MassHealth, workers’ compensation, short-term disability. Each may have a different right.
2. Ask each one in writing what it claims. Request an itemized statement of the amount paid and whether it is asserting a lien against your recovery or pursuing the at-fault party directly.
3. Do not sign a release without checking. Before you sign anything with the other driver’s insurer, make sure it does not release claims your own insurer still holds. Limited collision coverage puts the duty to preserve the insurer’s right of subrogation on you.
4. Tell the workers’ compensation insurer before any settlement. Under c. 152, sec. 15, a settlement with the other driver generally needs approval after a hearing at which the workers’ compensation insurer can be heard.
5. Check the full-compensation rule. If your uninsured motorist insurer paid you and claims part of a later recovery, ask whether you have been fully compensated, because c. 175, sec. 113L(4) puts its claim behind yours until you have.
6. Allocate the settlement deliberately. MassHealth’s statute presumes an unallocated settlement pays medical expenses first, so a settlement that does not say how it is divided can send more to repayment than the medical bills justify.

Answer Capsule

Subrogation is the right of an insurer or benefit program that paid for a loss to step into the injured person’s place and recover that amount from whoever was legally responsible. After a Massachusetts car accident it can arise five ways. A PIP insurer is subrogated “to that exact extent” of what it paid under M.G.L. c. 90, sec. 34M, recovering from a non-exempt person or by claim against the at-fault driver’s insurer, and it may not reduce the liability insurance available to the injured person. A collision insurer, which pays under c. 90, sec. 34O without regard to fault, pursues the at-fault driver, and a limited collision policyholder must “take all steps necessary to preserve the insurer’s right of subrogation”. An uninsured motorist insurer recovers from the injured person’s settlement only after that person “has received full compensation” under c. 175, sec. 113L(4). A workers’ compensation insurer recovers up to what it paid under c. 152, sec. 15, the employee keeps the excess, fees are shared in proportion, and settlements generally need approval. A health plan may not recover more than $2,000 of PIP benefits under c. 90, sec. 34A, and MassHealth is repaid under c. 118E, sec. 22. Comparative negligence under c. 231, sec. 85 limits every subrogation claim exactly as it limits the injured person’s own claim. This is general information and not legal advice.

Why the Order of Payment Matters

The most common subrogation problem is not a dispute over whether an insurer has a right. It is that several payers each have a right, the at-fault driver has limited insurance, and there is not enough money to go around.

Consider a worker hurt in a crash caused by a driver carrying the minimum bodily injury limits. Workers’ compensation paid wage benefits and medical bills. The worker also has a health plan and, later, an underinsured motorist claim against the worker’s own policy. Section 15 sends the liability recovery to the workers’ compensation insurer first, up to what it paid, less its share of fees. The underinsured motorist insurer, if it pays, waits behind the worker’s full compensation. The health plan’s claim against PIP is capped at $2,000. Each rule points in a different direction, and the sequence in which claims are made and settled affects what the worker keeps.

None of this is visible from a single settlement offer. The offer states one number. What reaches the injured person depends on every subrogation claim sitting behind it.

Key terms

• Subrogation is the substitution of an insurer or benefit program for the person it paid, so that it can recover that payment from the party responsible for the loss.
• Lien is a claim against money the injured person recovers, which must be paid out of that recovery before the rest is distributed.
• Tort exemption is the protection in c. 90, sec. 34M that shields an insured driver from being sued for losses that PIP covers.
• Full compensation is the condition in c. 175, sec. 113L(4) that the injured person must reach before an uninsured motorist insurer is entitled to any part of a recovery.
• Excess, under c. 152, sec. 15, is the amount by which a third-party recovery exceeds the workers’ compensation already paid, which belongs to the employee.
• Release is the signed document that ends a claim against a party, and signing one too early can extinguish rights that an insurer still holds.

Frequently Asked Questions

Q: What does subrogation mean on a car insurance claim?

A: It means the insurer that paid your claim takes over your right to recover that amount from the person who caused the loss. If your collision coverage paid for your car after another driver hit you, your insurer can pursue that driver and that driver’s property damage liability insurer for what it paid.

Q: Can my own insurance company take money from my injury settlement in Massachusetts?

A: Sometimes, and it depends on which coverage paid. A PIP insurer usually recovers from the other driver’s insurer rather than from you, and c. 90, sec. 34M bars it from reducing the liability insurance available to you. An uninsured motorist insurer can claim settlement proceeds only after you have received full compensation under c. 175, sec. 113L(4). A health plan is limited to $2,000 of PIP benefits under c. 90, sec. 34A.

Q: Does my collision insurer still pay if the crash was my fault?

A: Yes. M.G.L. c. 90, sec. 34O says collision benefits are payable “without regard to negligence, comparative negligence, gross negligence or fault of any kind”, subject to your deductible. Limited collision is different and pays only in four listed situations, generally where another identified person was at fault.

Q: How does workers’ comp subrogation work in Massachusetts?

A: Under c. 152, sec. 15, either you or the workers’ compensation insurer may sue the third party who caused the injury, but the insurer must have paid compensation and wait seven months from the injury. The recovery goes to the insurer up to what it paid, you keep the excess, attorney’s fees are shared in proportion to what each receives, and a settlement generally needs approval after a hearing.

Q: What is the made-whole rule for uninsured motorist claims in Massachusetts?

A: The statute itself states it. Under c. 175, sec. 113L(4), the uninsured motorist insurer “shall not be entitled to any such proceeds unless and until the person insured… has received full compensation” for the injuries. If everything available falls short of your full losses, that insurer is not repaid ahead of you.

Q: Can the other driver’s insurance company sue me for subrogation?

A: If you were insured, the tort exemption in c. 90, sec. 34M protects you personally from PIP subrogation, and the other driver’s insurer claims against your insurer instead. Your property damage liability coverage answers for the other car up to your limit. If you were uninsured, the exemption does not apply and both the PIP insurer and the collision insurer can sue you directly.

Q: Does being partly at fault reduce what my insurer can recover?

A: Yes. Under c. 231, sec. 85, damages for injury to person or property are reduced in proportion to the claimant’s own negligence, and recovery is barred if that negligence is greater than the other side’s. Your insurer stands in your shoes, so its subrogation claim is reduced or barred the same way.

Q: Should I sign a release from the other driver’s insurer before my own insurer is repaid?

A: Check first. A release can end claims your own insurer still holds. Limited collision coverage requires you to “take all steps necessary to preserve the insurer’s right of subrogation”, and a settlement in a work injury case generally needs approval under c. 152, sec. 15. Ask every payer in writing what it claims before signing anything.

Q: Is Jimmy Knows AI giving me legal advice?

A: No. This page is general information about Massachusetts law for educational purposes. It is not legal advice for your situation and does not create an attorney-client relationship. For advice about your own case, call Jim Glaser Law at (617) JIM-WINS.

Talking to a Lawyer

Subrogation is where several statutes meet one settlement, and the order in which claims are made and released can change what you keep. If insurers or a benefit program are claiming part of your recovery after a Massachusetts crash or work injury, call Jim Glaser Law at (617) JIM-WINS. The line is answered 24 hours a day. The first telephone consultation is free. This page is general information about Massachusetts law, not legal advice about your situation.