The collateral source rule in Maryland stops a defendant from lowering what they owe you just because a health insurer, government program, employer, or someone else already paid part of your losses. At trial, the jury never hears about those outside payments and calculates your damages based on the full value of your injuries.1Justia Law. Haischer v. CSX Transportation What you actually take home after the verdict is a different question, because insurers and government programs often have a legal right to be repaid from your recovery.
How the Rule Works at Trial
The rule operates on two levels. It is an evidentiary rule, so the defense cannot introduce testimony or documents showing that a third party paid for your injuries. It is also a damages rule, so the jury calculates your award on the full value of your losses, not what remains unpaid.1Justia Law. Haischer v. CSX Transportation
The reasoning is simple. If you paid premiums on a health policy for years, the person who hurt you should not pocket the benefit of those premiums. Maryland courts have long accepted the risk of a perceived double recovery over letting a wrongdoer escape the full cost of the harm.
What Counts as a Collateral Source
A collateral source is any payment or benefit that comes from somewhere other than the defendant. Common examples include:
- Private health insurance payments toward your medical bills.
- Government programs such as Medicare, Medicaid, or Social Security disability.
- Employer benefits like sick leave, vacation used during recovery, or employer-sponsored disability coverage.
- Gratuitous payments from relatives or friends, or donated medical services.
- Workers’ compensation benefits from an on-the-job injury claim.
The defendant contributed nothing to any of these sources, so the jury does not hear about them, whether your brother covered your rent during recovery or your employer’s disability plan replaced lost wages.
Medical Bills and Insurance Write-Offs
This is where the rule has the biggest financial effect. When a hospital bills $50,000 for surgery but accepts $15,000 from your insurer as payment in full, the $35,000 difference is a contractual write-off negotiated between the insurer and the provider. Under Maryland law, you are entitled to recover the reasonable value of the services you received, not just the discounted amount your insurer paid.2Maryland General Assembly. SB269 – Courts and Judicial Proceedings – Evidence – Rebuttable Presumption of Medical Bills
The jury sees the original billed amounts. Evidence of insurance discounts or negotiated write-offs is kept out. Maryland courts treat those adjustments as collateral benefits belonging to you, not the defendant.
Proving the Bills Are Reasonable
There is a practical hurdle that catches people off guard. Under current Maryland law, you generally need an expert witness to testify that your medical charges are fair and reasonable. That expert costs money and adds complexity.2Maryland General Assembly. SB269 – Courts and Judicial Proceedings – Evidence – Rebuttable Presumption of Medical Bills
Senate Bill 269, introduced in the 2026 Maryland legislative session, would create a rebuttable presumption that medical bills produced in discovery are fair and reasonable, so most plaintiffs would not need expert testimony. A defendant who wanted to challenge the amounts would have to bring their own expert. As of early 2026, the bill is still pending in the Senate Judicial Proceedings Committee.3Maryland General Assembly. Legislation – SB0269
The Medical Malpractice Exception
The broadest statutory exception applies to medical malpractice cases. Under Maryland Courts and Judicial Proceedings Code ยง 3-2A-09, after a jury returns a verdict in a health care malpractice action, the defendant can ask the judge to reduce the award by the amount of any collateral source payments that have been made or are payable to you.4Maryland General Assembly. Maryland Code Courts and Judicial Proceedings 3-2A-09
The statute defines collateral source broadly, covering health insurance payments, federal or state program benefits, employer-sponsored plan payments, and other sources of reimbursement. But the court cannot reduce the judgment by any amount subject to a right of subrogation. If your health insurer has the legal right to demand repayment from your settlement, that amount stays in the verdict because you will owe it back.4Maryland General Assembly. Maryland Code Courts and Judicial Proceedings 3-2A-09
The statute also protects payments from assets you own, your employment income, and insurance policies you purchased for your own benefit. The reduction happens after the verdict, and it is the judge who applies it, not the jury.
What You May Have to Pay Back
Recovering the full value of your injuries at trial does not always mean you keep every dollar. After a settlement or verdict, your health insurer, a government program, or your employer’s plan may have a legal right to be reimbursed. Ignoring these obligations is one of the costliest mistakes a plaintiff can make.
State-Regulated Health Insurance Plans
If your health coverage is a traditional policy regulated by Maryland’s Insurance Commissioner, the insurer can assert a subrogation claim against your personal injury recovery. Maryland law limits what the insurer can collect: the subrogation amount is reduced proportionally by your attorney’s fees, with the fee ratio capped at one-third.5New York Codes, Rules and Regulations. Maryland Insurance Article 11-112 – Reduction of Subrogation Claims If the insurer paid $30,000 in medical bills and your attorney’s fees represent one-third of your recovery, the subrogation claim drops by $10,000 to $20,000.
Self-Funded ERISA Plans
If your employer self-funds its health plan rather than buying traditional insurance, the picture changes. Self-funded plans fall under the federal Employee Retirement Income Security Act, and federal law preempts Maryland’s subrogation reduction protections.6Office of the Law Revision Counsel. 29 USC 1144 – Other Laws Depending on the plan’s language, a self-funded ERISA plan can demand full reimbursement of every dollar it spent on your injury-related care, with no reduction for your attorney’s fees. Many large employers use self-funded plans.
How do you know? The plan documents will say. If your employer pays claims from its own funds rather than through a purchased insurance policy, it is almost certainly self-funded and subject to ERISA preemption.
Medicare Liens
If Medicare paid any of your injury-related medical expenses, federal law requires you to reimburse the program from your settlement or verdict. The Medicare Secondary Payer statute gives the government a right of recovery, and ignoring it can lead to double damages.7Office of the Law Revision Counsel. 42 USC 1395y – Exclusions From Coverage and Medicare as Secondary Payer Once Medicare issues a final demand, you have 60 days to pay before interest starts accruing.
Workers’ Compensation Liens
If your injury happened on the job and someone other than your employer was responsible, you can pursue a personal injury claim against that third party while still receiving workers’ compensation. Maryland law gives the workers’ compensation insurer a statutory lien on whatever you recover from the third-party case.8Maryland Courts. Brethren Mutual Insurance Co. v. Kenneth Suchoza
How You Can Lose the Protection
The rule is not bulletproof. You can open the door to collateral source evidence through your own testimony or arguments at trial. Maryland courts recognize at least two situations where that happens.
The first is financial hardship. If you argue to the jury that the defendant’s negligence has left you in dire straits with no other source of income, the defense can introduce evidence of collateral payments to rebut that claim. The Court of Appeals addressed this in Haischer v. CSX Transportation, holding that outside benefits become admissible once the plaintiff puts their financial condition at issue.1Justia Law. Haischer v. CSX Transportation
The second is malingering. If the defense believes you are exaggerating your injuries or have little incentive to return to work, evidence of collateral benefits may be admitted to show that motivation. Both exceptions are narrow, but a careless statement from the witness stand can undo the protection.
PIP Benefits in Auto Cases
Personal Injury Protection coverage in Maryland is optional, not mandatory. If you carry PIP, it pays medical expenses and lost wages regardless of fault. How PIP payments interact with a later personal injury lawsuit depends on your policy’s terms and Maryland insurance law. A plaintiff generally cannot recover the same medical expenses from both PIP and a tort verdict, but the specifics turn on the policy language and whether the PIP insurer asserts a right of reimbursement. Review your coordination-of-benefits and subrogation provisions before settling.
Filing Deadline
None of these protections help if you miss the deadline. Maryland’s general statute of limitations for personal injury claims is three years from the date the injury occurs.9Maryland General Assembly. Maryland Code Courts and Judicial Proceedings 5-101 Miss it and you lose the right to pursue damages entirely. Certain circumstances, such as injuries to minors or cases involving fraud, can alter the deadline, but three years is the default for most personal injury actions.