Medicare set aside: what an MSA is and how the money must be spent

A Medicare set aside is a portion of an injury settlement that is carved out and reserved to pay for future medical treatment related to the injury — treatment that Medicare would otherwise cover. The money sits in a separate account, is spent only on qualifying items, and is reported. Once it is properly exhausted, Medicare picks up the injury-related costs again.

The reason it exists is a federal payment-priority rule, not a tax rule. Medicare is a secondary payer: where another party is responsible for an injury, that party's settlement is expected to cover the related medical costs before Medicare does. An MSA is the mechanism that stops a settlement from quietly shifting future injury care onto Medicare. It is most familiar in workers' compensation, where the process is formalised, and it appears in liability settlements too.

The rule underneath it

The Medicare Secondary Payer provisions make Medicare the secondary payer where a workers' compensation plan, liability insurer, or no-fault insurer is responsible for an injury. When a settlement closes out future medical treatment, the parties are expected to take Medicare's interests into account.

If they do not, the consequence falls on the injured person. Medicare can refuse to pay injury-related claims until the settlement amount attributable to future medical care has been used up, and can pursue recovery of amounts it has already paid. The MSA is how the parties demonstrate that the future medical portion has been identified and preserved.

Two points are frequently confused and worth separating at the outset. First, an MSA covers future injury-related treatment. Amounts Medicare already paid before settlement are handled through a separate conditional-payment recovery process. Second, an MSA is only relevant to treatment Medicare would otherwise cover — it is not a general medical fund.

Who needs one

The obligation to consider Medicare's interests applies broadly, but the formal review process has thresholds. In workers' compensation, the Centers for Medicare & Medicaid Services will review a proposed set-aside amount when either:

• the claimant is already a Medicare beneficiary and the total settlement is greater than $25,000; or
• the claimant has a reasonable expectation of Medicare enrolment within 30 months of settlement and the anticipated total settlement is greater than $250,000.

Those are review thresholds, not exemption thresholds. Falling below them does not remove the underlying obligation to protect Medicare's interests; it only means CMS will not review the proposal. This distinction trips people up regularly, and CMS has reinforced it by requiring settlement data to be reported even where no set-aside amount is allocated.

Submission for review is itself voluntary. There is no statute or regulation requiring a workers' compensation MSA proposal to be submitted. The practical argument for submitting is finality: when CMS approves an amount, it stands behind that amount, and the parties know where they are. Without approval, the adequacy of the allocation can be questioned later, when it is far more expensive to fix. Confirm current thresholds and procedures with CMS before relying on them, as the guidance is revised periodically.

Liability settlements sit in a less structured position. The same secondary-payer principle applies, but CMS has not built an equivalent standing review process for liability MSAs, so practice varies and the parties have to decide how to document their reasoning.

How the amount is calculated

An MSA allocation is a projection, not a negotiation. A trained allocator reviews the medical records, the treatment history, the prescription profile, and any agreed future care plan, then costs out the injury-related treatment Medicare would cover over the claimant's remaining life expectancy.

The components usually include:

Component	What drives it
Physician and therapy visits	Documented frequency of ongoing treatment
Prescriptions	Current medication list, priced over life expectancy
Surgeries and procedures	Only those anticipated in the records
Durable medical equipment	Replacement cycles over the projection period
Diagnostics	Recurring imaging and testing patterns

Two things follow from this. Because the projection is driven by what the records show, the medical file is the single biggest determinant of the number — an outdated or incomplete record set produces an allocation that does not match reality. And because prescriptions are priced over a long horizon, medication is often the largest line in the allocation, which is why treatment changes before settlement can move the figure materially.

Funding: lump sum or structured

An MSA can be funded in two ways, and the choice has real consequences.

Lump sum. The full allocated amount is deposited at settlement. The account is fully funded from day one, and administration is straightforward, but the settlement has to bear the whole amount at once.

Structured (annuity) funding. An initial seed deposit covers the first period of anticipated treatment — typically the first year's costs plus the cost of the first anticipated surgery or replacement item — and an annuity then makes fixed annual deposits into the account for the claimant's life expectancy.

Structured funding is common because the cost of funding the same projected care is lower when it is paid over time. It also has a built-in discipline: if the account is spent down too fast in one year, the next annual deposit refills it, whereas a depleted lump-sum account is simply gone. The plumbing is the same as any structured settlement annuity — a fixed schedule of payments from a life insurer, which is why MSAs and structured settlements are so often arranged together.

The trade-off is rigidity. Annual deposits arrive on schedule regardless of what treatment actually costs that year, and the schedule cannot be accelerated. That is the same feature that makes structured settlements resistant to dissipation, viewed from the other direction. For a fuller picture of how these payment shapes are built, see structured settlement payout options.

Administering the account

The money must be held in a separate interest-bearing account, used only for injury-related items that Medicare would otherwise cover, and accounted for annually. The claimant may self-administer, or appoint a professional administrator.

The spending rules are narrower than most people expect:

• Only treatment related to the settled injury qualifies. Unrelated care comes from elsewhere.
• Only items Medicare would cover qualify. A treatment Medicare does not cover cannot be paid from the account, even if the doctor recommends it.
• Payments should be made at the applicable Medicare or fee-schedule rate.
• Interest earned in the account stays in the account.
• Annual attestation of spending is required.

Self-administration saves the administrator's fee and suits a straightforward claim with a disciplined claimant. Professional administration costs money but takes on the record-keeping, the fee-schedule pricing, and the annual reporting — and mistakes in those areas are the ones that cause Medicare to deny claims later.

Once the account is properly exhausted and the spending has been reported, Medicare resumes paying for injury-related care. Where it has been spent on the wrong things, Medicare can treat the account as though it still held the money, and the claimant pays out of pocket in the meantime.

Tax treatment

The set-aside does not change the tax character of the underlying settlement. Compensation for personal physical injury or sickness is excluded from gross income under IRC §104(a)(2), and workers' compensation benefits under IRC §104(a)(1). Ring-fencing part of that money for future medical care does not convert it into taxable income — the point is covered more fully in are structured settlements taxable.

Interest earned inside the MSA account is a separate matter and is generally taxable to the account holder, even though it must remain in the account and be spent on qualifying care. That surprises people, so it is worth flagging at settlement rather than at the first tax return.

How it fits with everything else at settlement

An MSA rarely arrives alone. In a serious claim it sits alongside several other moving parts, and the order in which they are settled matters:

• Conditional payment resolution for treatment Medicare already paid, handled separately and before closing.
• The future medical allocation itself, which is the MSA.
• Income design for the rest of the settlement, often through a structure — see workers' comp structured settlements for how these two pieces are usually combined.
• Benefits protection where the claimant receives means-tested benefits. Medicare eligibility is not means-tested, but Medicaid and SSI are, and settlement money can disturb them. That is a job for a special needs trust, which addresses a different problem from an MSA and does not substitute for one.

Confusing the last two is a common and expensive error. An MSA protects Medicare's payment priority. A special needs trust protects means-tested eligibility. A claimant can need both, and each has its own rules.

Frequently asked questions

Is a Medicare set aside legally required?

The obligation to take Medicare's interests into account when a settlement closes out future medical treatment comes from the Medicare Secondary Payer rules. Formally submitting a proposed workers' compensation amount to CMS for review is voluntary, but the underlying obligation is not, and CMS approval is what gives the parties finality.

What happens if the account runs out?

If the money has been spent on qualifying injury-related care at appropriate rates and the spending has been properly reported, Medicare resumes paying for that care. Proper administration and annual attestation are what make this work — an exhausted account with poor records is a much weaker position.

Can MSA money be used for anything else?

No. It is restricted to injury-related treatment that Medicare would otherwise cover. Using it for unrelated care, non-covered treatment, or general living expenses can leave the claimant paying out of pocket for injury care until the misspent amount is made good.

Does a structured MSA pay less overall than a lump sum?

The annual deposits over life expectancy typically total more than a lump sum, but the cost of funding the arrangement is lower because the payments are spread over time. The practical benefit is the annual replenishment, which protects the claimant from exhausting the fund early. Figures depend on the individual case and should be quoted, not assumed.

This article is general education, not personal legal, tax, or financial advice. CMS thresholds, reporting requirements, and reference guidance are revised periodically, and liability MSA practice in particular is unsettled. Anyone settling an injury claim that involves future medical care should verify current CMS guidance and work with counsel and a qualified allocator before agreeing terms.