Medicare Lien Calculator 2027 — Settlement Payback Estimator

What is a Medicare lien on a personal injury settlement?

When Medicare pays medical bills related to an injury that a third party caused, federal law (42 USC 1395y(b)(2), the Medicare Secondary Payer Act) gives Medicare a statutory right of recovery from any settlement, judgment, or award. This claim is commonly called a Medicare lien, though technically it is a federal reimbursement obligation enforced by the Benefits Coordination & Recovery Center (BCRC). The lien attaches to settlement proceeds at the moment of payment, and failing to satisfy it within 60 days can trigger interest and double damages under 42 USC 1395y(b)(3)(A).

For a typical injury claim, Medicare issues a Conditional Payment Letter (CPL) listing every claim it paid that relates to the injury. The plaintiff's attorney audits the CPL, disputes unrelated charges, and then receives a Final Demand Letter showing the post-reduction amount Medicare expects back. The procurement-cost reduction under 42 CFR 411.37 is the most important number — it can cut the Medicare payback by 25%-45%.

How the procurement-cost reduction works (42 CFR 411.37)

42 CFR 411.37 requires Medicare to share in the costs the beneficiary paid to obtain the settlement. The formula: procurement ratio = (attorney fees + costs) / gross settlement. Medicare's payback is then reduced by (procurement ratio x conditional payments). For example, on a $100,000 settlement with a 33.33% contingency fee and $3,000 in costs, the procurement ratio is 36.33% — meaning Medicare must absorb 36.33% of its own claim as its share of legal costs.

If Medicare paid $25,000 in conditional payments, the reduction is $25,000 x 0.3633 = $9,083, leaving $15,917 owed back. The American Bar Association and Nolo both note this is the single biggest lever attorneys have to maximize client net recovery on Medicare cases. Some firms forget to claim the procurement reduction in writing — BCRC will apply it automatically if the demand letter shows the math, but a written request is safer.

Net to client and disbursement timing

After fees, expenses, and the reduced Medicare lien are subtracted, what remains is the net to client. On a $100,000 settlement with 33.33% fee, $3,000 expenses, and $25,000 Medicare paid: client receives roughly $48,750 after the procurement-reduced $15,917 Medicare payback. Attorneys must hold settlement funds in trust until BCRC issues a Final Demand Letter — disbursing early exposes both client and counsel to Medicare's double-damages remedy under 42 USC 1395y(b)(3)(A).

Settlements under $5,000 ($300 cap under fixed-percentage option) may qualify for Medicare's self-calculated final conditional payment process, which speeds disbursement to 65 days. Medicare Advantage (Part C) plans are governed by their plan-specific contract terms plus the Supreme Court's holding in Humana v. Western Heritage — those plans can also sue for double damages, so audit any Part C explanation of benefits separately.

Sources: 42 USC 1395y(b)(2), 42 CFR 411.37, CMS Medicare Secondary Payer Manual, americanbar.org, nolo.com. Last updated: May 2026.