Five different claimants can reach into your recovery — hospitals, health insurers, ERISA plans, Medicare, and Medicaid — and each plays by different rules. Knowing which rules apply is routinely worth thousands, because most liens are negotiable and most people never negotiate them.
Authorities verified August 24, 2026 · verification policy · changelogMost states give hospitals a direct lien on your third-party recovery — Texas's statute attaches if you were admitted within 72 hours of the accident (Tex. Prop. Code ch. 55), California's Hospital Lien Act limits the claim to reasonable and necessary charges (Civ. Code §3045.1). The leverage: hospitals lien their chargemaster rates, which nobody actually pays — reasonable-charge challenges and prompt-pay compromises are standard.
Your insurer's contract says it gets paid back from your recovery. Two equitable doctrines push back: the common-fund doctrine (whoever benefits from the fund your lawyer created shares the legal fee — the insurer's claim is reduced by your fee percentage) and the made-whole doctrine (no reimbursement until you've been fully compensated). Both trace through US Airways v. McCutchen — which also delivers the warning: ERISA plan language can override both, so the plan document, not the doctrine, is where an ERISA lien fight starts.
Medicare's recovery runs on its own fee-sharing formula with published shortcuts — we've built the actual §411.37 calculator for it. Medicaid is bounded the other way: Arkansas DHS v. Ahlborn limits state recovery to the medical-expense share of your settlement — the federal anti-lien law protects the rest, which makes the allocation written into your settlement agreement a negotiating document in itself.
| Health insurer's claimed reimbursement | paid claims | $18,000 |
| Common-fund reduction (your fee share) | $18,000 × 33.3% | − $6,000 |
| Disputed unrelated charges | pre-existing care removed | − $2,400 |
| Negotiated repayment | $18,000 − $6,000 − $2,400 | $9,600 |
| Recovered for you, no extra litigation | $18,000 − $9,600 | $8,400 |
Every dollar of lien reduction is a dollar of net recovery — the cheapest money in the whole case. If an attorney handles your claim, ask two questions up front: will you negotiate my liens, and does your fee apply to the amount you save me? Then put the final numbers through the take-home calculator.
A lien (or reimbursement right) is a legal claim on your recovery held by whoever paid for your treatment: a hospital under a state lien statute, your health insurer under your policy's subrogation clause, Medicare under federal law, or Medicaid under state law. They're paid from the settlement before you are — which is why the gross number and your check differ so much.
Usually — and this is the most under-negotiated money in settlements. Health-insurer claims are routinely reduced under the common-fund doctrine (they benefited from your lawyer's work, so they share the fee), hardship, or disputed charges; hospital liens are limited to reasonable charges and often compromise; Medicare's reduction formula is automatic with waiver beyond it. The main exception: ERISA plan terms can override the equitable doctrines (US Airways v. McCutchen), so read the plan language first.
Medicare recovers under federal law with its own fee-sharing formula — see our Medicare page. Medicaid is state-run and constrained by Arkansas DHS v. Ahlborn: it can only recover from the portion of your settlement that represents medical expenses, not from your pain-and-suffering or wage recovery. Allocation in the settlement agreement therefore matters enormously in Medicaid cases.
Before you sign, not after. Identify every claimant early (ask your health insurer for its claimed amount in writing), dispute unrelated charges while there's leverage, and make lien reduction an explicit part of settlement math — a $10,000 lien negotiated to $6,000 is worth exactly as much as $4,000 of extra settlement, with no extra litigation.