A medicare set aside is money carved out of your injury settlement and reserved for future medical care that Medicare would otherwise pay for. It is not a fee, a tax, or a penalty. It is your own settlement dollars, held back and spent first on injury-related treatment before Medicare picks up the bill. A medicare set aside comes up most often in workers’ compensation cases, and increasingly in liability cases too.
It sits alongside a second, separate obligation: paying Medicare back for bills it already covered. Those two things get confused constantly. This guide separates them and walks through the process, the entities involved, and the deadlines that carry real consequences.
Why a Medicare Set Aside Exists
Federal law makes Medicare a “secondary payer.” If another party is responsible for your injury, that party pays first. Medicare is not supposed to absorb costs that belong to a workers’ compensation carrier or a liability insurer.
In practice, Medicare often pays anyway while a case is pending. Those are called conditional payments. They are conditioned on being repaid out of your settlement. CMS explains the framework on its Non-Group Health Plan Recovery page.
The same logic applies going forward. If your settlement includes money for future treatment, Medicare expects that money to be used for that treatment. A medicare set aside is how that expectation gets documented. Without one, Medicare can refuse to pay injury-related claims until you show the settlement funds were exhausted appropriately.
CMS review of a medicare set aside proposal is voluntary, not mandatory. But CMS publishes workload thresholds for when it will review one. Under the current Workers’ Compensation Medicare Set Aside Arrangements guidance, CMS reviews proposals when the claimant is a Medicare beneficiary and the total settlement exceeds $25,000, or when the claimant reasonably expects Medicare enrollment within 30 months and the total settlement exceeds $250,000.
CMS states plainly that these are workload thresholds. They are not permission to ignore Medicare’s interests below those numbers. Confirm the current figures with your attorney against the latest WCMSA Reference Guide before relying on them.
How Much a Medicare Set Aside Takes
Two different calculations hit your settlement. The first is repayment of past conditional payments. The second is the medicare set aside for future care. They use completely different math.
Past repayment is reduced for procurement costs under 42 CFR 411.37. Medicare takes the ratio of your attorney fees and case costs to the gross settlement, applies that ratio to what Medicare paid, and subtracts it.
The future medicare set aside amount is built differently. It is projected from your medical records and prescription history over your life expectancy, priced at applicable fee schedule rates. Nothing is subtracted for attorney fees.
Here is a worked example. These are illustrative round numbers only, not a prediction about any real case.
| Line item | Amount |
|---|---|
| Gross settlement | $300,000 |
| Attorney fee (33.33%) | $100,000 |
| Case costs | $5,000 |
| Total procurement costs | $105,000 |
| Medicare conditional payments (past bills) | $40,000 |
| Procurement ratio ($105,000 ÷ $300,000) | 35% |
| Medicare’s share of procurement costs (35% × $40,000) | $14,000 |
| Net repayment to Medicare ($40,000 − $14,000) | $26,000 |
| Medicare set aside for future care (projected separately) | $60,000 |
| Net to the injured person | $109,000 |
Notice the $60,000 is not gone. It is the client’s money, held in a separate interest-bearing account. It pays for injury-related care that Medicare would cover, at Medicare rates. When it is properly spent down and reported, Medicare resumes paying.
The Timeline From Injury to Final Demand
The sequence is fairly consistent. Knowing it helps you tell whether your case is stuck or moving.
- Reporting. The insurer reports the claim to Medicare under Section 111 mandatory insurer reporting. See the CMS Mandatory Insurer Reporting (NGHP) page. Since April 4, 2025, workers’ compensation settlements must also report the MSA amount.
- Rights and Responsibilities letter. The Benefits Coordination and Recovery Center opens a recovery case and mails this first.
- Conditional Payment Letter. The BCRC lists the claims it believes are related to your injury. This is an interim figure. It changes as new claims post.
- Disputes. Your attorney reviews the list and disputes unrelated charges through the Medicare Secondary Payer Recovery Portal (MSPRP).
- Optional Final Conditional Payment process. Within 120 days of settlement, the MSPRP can produce a time-stamped final amount. You must then settle within three business days and submit settlement details within 30 days.
- Medicare set aside proposal. If thresholds are met, an allocation is submitted through the WCMSA Portal for CMS review.
- Final Demand. After settlement is reported, the BCRC issues the Final Demand letter with the exact repayment amount.
The Final Demand carries the deadline that matters most. Per the CMS Medicare’s Recovery Process page, payment is due within 60 days. Miss it and interest is assessed for each 30-day period the debt stays unresolved.
An appeal of the Final Demand must be filed within 120 days of receiving it. Receipt is presumed five calendar days after the letter date unless you prove otherwise.
How to Reduce What You Repay
Three levers exist, and they are distinct from one another.
Procurement cost reduction. This is automatic under 42 CFR 411.37 when attorney fees and costs were incurred. It should already be reflected in the Final Demand. Check that it was applied.
Relatedness disputes. The BCRC pulls claims by diagnosis code and date range. Unrelated treatment routinely gets swept in. Disputes are submitted through the MSPRP with supporting records, and CMS commits to addressing them within 11 business days under the Final Conditional Payment process.
Waiver and compromise. A waiver asks Medicare to forgive the debt based on financial hardship or equity. The BCRC sends form SSA-632-BK, Request for Waiver of Overpayment Recovery, which asks for income, assets, and expenses.
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A compromise is different. It asks Medicare to accept less than the full amount. The BCRC cannot approve compromises itself; it forwards them to CMS. Details are on the CMS Reimbursing Medicare page.
None of these levers guarantees a reduction. They are requests, and Medicare decides.
What Happens If You Get It Wrong
Ignoring the Final Demand starts a debt collection process. Interest accrues from the demand date. Payments apply to interest first, principal second. Unresolved debts can be referred to the Department of the Treasury for offset against federal payments, including Social Security benefits.
Separately, the Medicare Secondary Payer statute allows the United States to bring an action for double damages against a primary plan that fails to pay. That exposure can reach parties who received settlement proceeds, including attorneys.
Mishandling a medicare set aside creates a different problem. If the funds are spent on unrelated items, Medicare can deny injury-related claims until the set-aside is properly accounted for. Self-administered accounts require annual attestation of spending to the BCRC.
This is why the attorney handling your case usually manages all of it. Lien resolution and medicare set aside allocation are routine parts of settling an injury claim. Most firms use a professional allocation vendor and a professional administrator.
Questions to Ask Your Attorney
Ask these before you sign a release, not after.
- Has the BCRC issued a Conditional Payment Letter, and can I see the itemized claim list?
- Which charges are you disputing as unrelated, and what is the current disputed total?
- Does this settlement need a medicare set aside, and will it be submitted to CMS for review or not?
- Who calculates the medicare set aside amount, who pays for that allocation, and will I self-administer or use a professional administrator?
- What is the projected net to me after the Final Demand, the set-aside, fees, and costs?
Ask for the answers in writing. Ask for copies of every CMS letter as it arrives.
Frequently Asked Questions
Is a medicare set aside required by law?
No statute or regulation requires a formal set-aside or CMS review. The obligation is to protect Medicare’s interests. A medicare set aside is the method CMS recognizes for doing that. Whether one is appropriate in your case is a judgment call for your attorney.
What if my settlement is small?
CMS maintains a recovery threshold for certain liability, no-fault, and workers’ compensation settlements. For 2026, CMS published its threshold determination on the 2026 Recovery Thresholds page, maintaining $750. Confirm the applicable figure and whether ongoing responsibility for medicals exists, because that changes the answer.
Can I keep leftover money in the account?
If the account is properly exhausted and attested, remaining funds generally revert per the settlement terms. Rules differ for annuity-funded and lump-sum arrangements. Ask your administrator for the specific terms in your agreement.
Who do I call if I get a letter and my attorney has closed the file?
Contact the Benefits Coordination and Recovery Center using the number printed on the letter, or register for the MSPRP to view the case online. Do not let a Final Demand sit past 60 days while you look for the right person.
What to Do Next
A medicare set aside is normally managed by the attorney handling the injury case. Ask the firm in writing who is contacting the Benefits Coordination and Recovery Center, what is being held in escrow, and when you will see the final demand. If you have no attorney, your state bar’s referral service is the neutral place to start.
Official Sources & Resources
- Medicare Secondary Payer (CMS): https://www.cms.gov/medicare/coordination-benefits-recovery
- MSPRP portal: https://www.cob.cms.hhs.gov/MSPRP/
- Medicare.gov: https://www.medicare.gov
- CMS.gov: https://www.cms.gov
- Find your SHIP counselor: https://www.medicare.gov/talk-to-someone
Checked against the official sources above in September 2026. Rules and dollar figures change; if a notice you received disagrees with this page, the notice wins — and please tell us. General information, not legal, financial or medical advice.