Medicare Secondary Payer demands: what a conditional payment is, and what's actually worth disputing
Checked against the current rules on September 24, 2026.
A demand letter from Medicare after an accident or injury settlement can look like a final bill. It isn't — it's Medicare's own calculation, and calculations can be disputed.
Source: 42 CFR §§ 411.24, 411.37 — MSP conditional-payment recovery and procurement-cost reduction.
Medicare pays conditionally for care related to an accident, injury, or exposure so you don't have to cover it yourself while a liability, no-fault, or workers' compensation case is still pending — but that payment has to be repaid once you receive a settlement, judgment, award, or other payment from the other side.42 CFR 411.24
The demand only covers claims Medicare's own contractor determined were related to the specific accident or injury — a claim for an unrelated condition, even from around the same time, doesn't belong on the demand and can be disputed and removed.
The reduction most families miss
Medicare is required to reduce its own recovery amount to account for the cost of getting the settlement in the first place — attorney fees and other real procurement costs. This isn't a courtesy; it's a real regulatory requirement, and a demand that doesn't reflect it is calculated wrong.42 CFR 411.37
The reduction works as a ratio: the share of the settlement that went to procurement costs is applied against Medicare's own payment, and that share is subtracted from what Medicare can recover. A family that paid a contingency-fee attorney a third of the settlement should see roughly a third taken off Medicare's own demand for exactly that reason.
Reporting the case starts the clock, both ways
The recovery process begins when the case is reported to the BCRC — ideally as soon as a liability, no-fault, or workers' compensation claim is pending, not after a settlement already happened. Reporting early means the conditional-payment amount stays current instead of arriving as a surprise, larger, all-at-once total.
Once a settlement, judgment, or award actually occurs, the family (or their attorney) is responsible for notifying the BCRC with the settlement date, amount, and any procurement costs — the demand letter that follows depends on this information being accurate and complete.
If there's a real delay between the initial report and the eventual settlement, it's worth requesting an updated interim conditional payment letter rather than waiting — the BCRC keeps identifying new related claims the whole time the case is pending, and an outdated figure just gets revised upward later anyway.
Sources — last checked September 24, 2026
- 42 CFR 411.24as of September 24, 2026
- 42 CFR 411.37as of September 24, 2026
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By CaseWhy Appeals editorial. See how this content is produced. Not legal advice. Not affiliated with or endorsed by Medicare, CMS, or any health plan. A product of CaseWhy LLC.
