If you are on Medicare or Medicaid and you have a personal injury case, part of your settlement is almost certainly not yours to keep. That is not a scare tactic. It is a legal reality that catches people completely off guard at the worst possible moment, usually right when they think they are done and the money is finally coming. Understanding how these repayment rights work, where they come from, and how they can be negotiated is one of the most practically important things you can know about your own case.

Start with why this exists at all. When Medicare or Medicaid pays for your medical treatment after an accident caused by someone else, the government has stepped in to cover costs that are legally someone else’s responsibility. From the government’s perspective, it paid a bill that the at-fault party’s insurance should have paid. When you later settle your case and receive compensation that includes money for those same medical expenses, the government wants to be made whole. They are not supposed to subsidize the at-fault driver’s insurance company. That is the underlying logic, and it is why these repayment rights exist under federal and state law rather than just as a matter of contract.

Medicare and Medicaid operate under different legal frameworks, and confusing them is a real problem because the rules, the risks, and the negotiation options are meaningfully different for each one.

Medicare’s repayment right comes from the Medicare Secondary Payer Act, a federal law passed in 1980. Under that law, Medicare is always supposed to be a secondary payer, meaning it only covers costs when no other insurance is available to pay first. When someone else is liable for your injuries, their insurance is the primary payer, and Medicare is not supposed to pay at all. But since liability cases take time and insurance companies do not pay your medical bills while litigation is ongoing, Medicare steps in and pays conditionally, with the explicit understanding that it will be reimbursed once the case resolves. These are called conditional payments, and they are tracked by a Medicare contractor called the Benefits Coordination and Recovery Center, which you will sometimes see abbreviated as the BCRC.

Here is the part that most injured people never hear until their attorney brings it up, usually right before disbursement: the Medicare Secondary Payer Act gives the federal government the right to sue not just you but your attorney if Medicare’s interest is not protected and the funds are distributed without satisfying the lien. The statute provides for double damages in cases of knowing failure to reimburse. That exposure is one of the primary reasons your attorney will not simply hand you the money and let you sort out Medicare yourself. Your attorney has independent legal exposure, and a good attorney takes that seriously because it should be taken seriously. This is not the attorney being overly cautious. This is a genuine federal enforcement mechanism that has been used in real cases against both plaintiffs and their counsel.

The process of identifying and resolving Medicare’s conditional payments involves several steps that take real time. Early in your case or at resolution, your attorney should register your claim with the BCRC and request a conditional payment letter, which is a running list of everything Medicare has paid that it believes is related to your injuries. That letter is not the final bill. Conditional payment amounts change as new bills come in and as your case progresses. When the case resolves, your attorney requests a final demand letter, which is the actual number Medicare says it wants reimbursed. You have the right to dispute items on that list that are not actually related to the accident. If Medicare paid for your blood pressure medication or a pre-existing knee condition that has nothing to do with the car wreck, those items should not be on the list, and your attorney can submit documentation to have them removed. Getting those disputes resolved correctly can meaningfully reduce the amount owed.

Beyond simply disputing unrelated charges, there is a separate process for seeking a proportionate reduction in what Medicare is owed. The argument goes like this: if your case settles for less than the full value of your damages, perhaps because liability was contested or your damages were disputed, then you did not recover 100 cents on the dollar for your medical expenses. Medicare receiving full reimbursement in that scenario would mean Medicare recovers more proportionately from the settlement than you do. Under federal regulations, you can request that Medicare reduce its demand to reflect the settlement’s relationship to the full value of the case, as well as to account for procurement costs, meaning the attorney fees and case costs that made the recovery possible in the first place. Medicare does not always agree, but this reduction is available and is worth pursuing in the right circumstances.

Medicaid is a different animal, and the distinctions matter. Medicaid is a joint federal and state program, which means that Medicaid’s lien rights are governed partly by federal rules and partly by your state’s specific statutes. In Missouri, Medicaid is administered through MO HealthNet, and the state has a statutory right to recover from third-party settlements under Missouri Revised Statutes Section 208.215. Missouri’s Medicaid program is required by federal law to pursue third-party recovery when another party is legally liable for the recipient’s medical costs. This is not optional for the state. Federal law requires that states pursue these recoveries as a condition of receiving federal Medicaid funding.

The distinguishing insight that most people searching this topic have never encountered is the interplay between two different legal limits on Medicaid’s recovery rights. On one hand, Medicaid has an anti-lien rule under federal law that generally prohibits the state from asserting liens against real property owned by a beneficiary. On the other hand, when it comes to third-party personal injury settlements, the rules are different. The United States Supreme Court addressed this in Arkansas Department of Health and Human Services v. Ahlborn in 2006 and then again in Wos v. E.M.A. in 2013. The core principle from those cases is that Medicaid can only recover from the portion of your settlement that represents compensation for past medical expenses. If your settlement also compensates you for pain and suffering, lost wages, future medical expenses, and other categories of damages, Medicaid cannot reach those portions. Its recovery is limited to the medical expense slice of the total recovery.

This matters enormously in practice. If your case settles for $200,000 and only $40,000 of that was attributed to past medical expenses while the rest represents pain and suffering and lost income, then Medicaid’s recovery is limited to some portion of that $40,000, not the full settlement. The tricky part is that most settlements are global numbers without an itemized breakdown of what compensates for what. Your attorney and the state Medicaid program will need to work out an allocation, and sometimes that requires litigation or negotiation over how the settlement is characterized. States have different approaches to this allocation problem. Missouri courts apply a formula that attempts to allocate the settlement proportionately based on what fraction of the total claim the medical expenses represent. Knowing that allocation is negotiable and that you are not simply on the hook for the full amount Medicaid spent is genuinely valuable information that changes your position in this process.

There is also an important distinction in how quickly these programs move. Medicare, despite being a federal program, is actually known for being slow. Obtaining a final conditional payment amount from Medicare can take months, and your attorney will typically not distribute settlement funds until that final demand is received and resolved, because the alternative exposes both of you to the double-damages risk discussed earlier. Some states have created faster resolution processes for Medicaid, and Missouri’s MO HealthNet division has specific procedures for responding to settlement notifications. In both cases, however, you should expect that the presence of a government health coverage lien is going to add time to the gap between settlement and money in your pocket. How much time depends on how organized and responsive the agency is, how complex your medical history is, and how much your attorney is actively pushing the process forward.

The other concept that comes up specifically with Medicare, particularly in cases involving significant future medical care, is the Medicare Set-Aside. This is a separate issue from repayment of past conditional payments and applies when your settlement includes compensation for future medical expenses related to a workers’ compensation injury or, in some cases, a liability claim. If Medicare would be expected to cover future treatment for your injury after your settlement, CMS, the federal agency that runs Medicare, has developed a process for establishing a Medicare Set-Aside arrangement, which is essentially a fund within your settlement that must be used for injury-related medical expenses before Medicare will cover those future costs. Set-asides are more common and more formally regulated in workers’ compensation cases, but they can arise in liability settlements as well, particularly in cases involving catastrophic injuries and large settlements. If your attorney mentions a set-aside, they are addressing this Medicare Secondary Payer compliance issue for future care, not just repaying past conditional payments.

What should you actually be doing right now if you are in the middle of a case or approaching settlement? First, ask your attorney directly whether a Medicare or Medicaid lien has been identified and what steps have been taken to quantify it. If your attorney has already been working with the BCRC or with MO HealthNet, ask what the current conditional payment amount is and whether any disputes have been submitted. Second, ask whether any of the items on Medicare’s or Medicaid’s list are unrelated to the accident, because disputing those items is something you have the right to do and something that directly affects your net recovery. Third, if your settlement is less than the full value of your case, ask whether a proportionate reduction request has been submitted or is planned, because that process can put real money back in your pocket. And fourth, ask for a timeline, because these processes have regulatory deadlines and response windows that give you some ability to estimate when things will resolve.

The most important frame to bring to all of this is that Medicare and Medicaid liens are not fixed numbers that simply get subtracted from your settlement. They are starting points that can be reduced through dispute, through proportionate reduction requests, and through negotiation. The difference between an attorney who treats these liens as line items to pay and one who actively works to reduce them can be tens of thousands of dollars in your final check. You have every right to ask which approach your attorney is taking.

Your settlement represents what you fought for. Understanding who else has a claim on it, what the legal limits of those claims are, and how they can be reduced is how you protect as much of it as possible.

This article is intended for general informational purposes only and does not constitute legal advice. Medicare Secondary Payer law and Medicaid third-party liability rules are complex federal and state regulatory areas that vary by circumstance, state of residence, and the specific facts of your case. The law in this area has evolved through litigation and regulatory guidance, and outcomes depend heavily on case-specific facts. Nothing here should be relied upon as legal advice. Consult a licensed personal injury attorney in your state if you have questions about how these rules apply to your situation.