Medical Liens & Subrogation: What Comes Out of Your Settlement

The settlement figure is not the number that matters. What matters is what survives after the attorney fee, the case costs, and — the part most claimants never see coming — everyone with a legal right to be repaid out of your recovery. A $100,000 settlement with a $40,000 unreduced health-plan lien is a very different outcome from the same settlement with that lien negotiated to $15,000, and the difference is not luck.

Quick answer: Five categories of claimant can reach your settlement: Medicare, Medicaid, a private health insurer or ERISA plan, a hospital or provider lien, and a workers’ comp or PIP/med-pay carrier. Two doctrines limit them: the made whole doctrine (an insurer generally cannot recover until you are fully compensated) and the common fund doctrine (a lienholder shares proportionally in the attorney fees that created the recovery). Both are defaults that clear contrary plan language — particularly in a self-funded ERISA plan — can override.

The Five Claimants, and Why They Are Not Interchangeable

1. Medicare. Reimbursement arises under the federal Medicare Secondary Payer statute. Where Medicare paid for accident-related treatment, those are “conditional payments” it is entitled to recover from a liability settlement. This is the one you cannot quietly ignore: distributing funds without resolving a conditional payment claim exposes the claimant and counsel personally. It is also slow — the resolution process routinely adds weeks or months to closing a settlement.

2. Medicaid. State Medicaid agencies have federally mandated third-party recovery rights, but with a real ceiling the Supreme Court has defined twice (see below).

3. Private health insurance / ERISA plans. The single most important distinction in this whole area: whether the plan is fully insured (an insurer bears the risk — state insurance law applies, including state protections) or self-funded (the employer bears the risk — ERISA preempts much of that state law). Self-funded ERISA plans have materially stronger reimbursement rights. Establish which one you have early, because the answer changes everything downstream.

4. Hospital and provider liens. Creatures of state statute, and they generally must be perfected — filed correctly, within a set time, with required notice. A lien that was not perfected under the state’s requirements may be unenforceable as a lien, even though the underlying bill remains owed.

5. Workers’ comp, PIP and med-pay carriers. Where your own coverage paid first, it usually has a reimbursement right against a third-party recovery. Our guide to workplace third-party claims covers how the comp lien interacts with a lawsuit against a non-employer.

The Two Doctrines That Limit Every Lien

Made whole

The principle: an insurer should not recover from your settlement until you have been fully compensated for your total loss. Its practical bite is greatest in exactly the cases where it matters most — a catastrophic injury that settles at the at-fault driver’s policy limits, far below the claim’s real value. If you were not made whole, a subrogation claim taking a full pound of flesh from a partial recovery is precisely what the doctrine exists to prevent.

The limit that matters: made-whole is a default rule in most states that recognize it, not an immovable one. Clear language in the plan or policy disclaiming it can override it — and this is exactly where the fully-insured versus self-funded ERISA distinction becomes decisive.

Common fund

Your attorney created the recovery. A lienholder collecting out of that recovery benefited from work it did not pay for. The common fund doctrine says it should therefore bear a proportional share of the attorney fees and case costs — reducing the lien accordingly.

This is a real, routinely available reduction, and one that claimants negotiating a lien on their own frequently never raise. Note that in the ERISA context the Supreme Court has treated plan silence on fee allocation as leaving room for common-fund principles, while clear plan language addressing it controls — another reason the plan document is the first thing to read.

Medicaid: The Ceiling the Supreme Court Set

Two decisions define how far a state Medicaid agency can reach:

• Arkansas Dept. of Health & Human Services v. Ahlborn (2006) — a state may recover only from the portion of a settlement representing medical expenses, not from the entire recovery. Amounts genuinely attributable to pain and suffering or lost income are outside its reach.
• Gallardo v. Marstiller (2022) — that medical-expense portion includes amounts allocated to future medical care, not only past care already paid.

The practical consequence of the two read together: how a settlement is allocated among categories of damages is substantive, not clerical. An allocation that is documented, reasoned and defensible — ideally established through the settlement structure rather than asserted afterward — directly affects how much the state can claim.

ERISA: Why Self-Funded Plans Are Harder

ERISA governs employer-sponsored benefit plans, and federal preemption strips away many of the state-law protections a claimant would otherwise have against a health insurer’s reimbursement claim. The Supreme Court’s decision in US Airways v. McCutchen (2013) established the governing logic: in a suit to enforce an ERISA plan’s reimbursement terms, the written terms of the plan generally control, and equitable defenses cannot override clear contrary plan language — though where the plan is silent, equitable doctrines including common-fund principles can fill the gap.

What this means in practice:

• Get the actual plan document, not the summary. The reimbursement provision’s exact wording is the case.
• Confirm self-funded versus fully insured. A fully insured plan is subject to state insurance law and state anti-subrogation or made-whole protections; a self-funded one largely is not.
• Even strong ERISA liens get negotiated. A plan’s legal right to full reimbursement and a plan administrator’s willingness to compromise for prompt, certain payment are different things.

What Actually Reduces a Lien

1. Establish the legal basis first — statute, plan document, or policy. A lien asserted without a valid legal basis, or a hospital lien never properly perfected, may not be enforceable as asserted.
2. Audit the charges line by line. Liens routinely include treatment unrelated to the accident. Unrelated charges come out.
3. Apply the common fund doctrine — the lienholder’s proportional share of fees and costs.
4. Raise made-whole where the recovery is partial and the state recognizes it.
5. Use the allocation where damages categories matter, particularly against Medicaid.
6. Negotiate on certainty. A lienholder facing delay and litigation risk frequently accepts a reduction for prompt resolution.
7. Never distribute funds with an unresolved Medicare claim outstanding.

Sources & Further Reading

• 42 U.S.C. § 1395y(b) — the Medicare Secondary Payer statute, the basis for Medicare’s conditional payment recovery rights
• 42 U.S.C. §§ 1396a(a)(25), 1396k — state Medicaid third-party liability and assignment-of-rights requirements
• Arkansas Dept. of Health & Human Services v. Ahlborn, 547 U.S. 268 (2006) — limiting state Medicaid recovery to the medical-expense portion of a settlement
• Gallardo v. Marstiller, 596 U.S. 420 (2022) — extending that portion to amounts allocated for future medical care
• US Airways, Inc. v. McCutchen, 569 U.S. 88 (2013) — ERISA plan reimbursement terms control over equitable defenses, with common-fund principles available where the plan is silent
• 29 U.S.C. § 1132(a)(3) — the ERISA provision under which plans bring reimbursement actions
• State hospital lien statutes and state law on the made-whole doctrine, both of which vary substantially
• See our guides to personal injury lawyer fees for how liens fit into the overall settlement arithmetic, and the lien and subrogation glossary entries
• If you had no health insurance and were treated on a letter of protection or provider lien, the arithmetic starts earlier — see our guide to getting treatment after an accident with no insurance
• To see what a negotiated lien reduction is actually worth to you — every dollar of it, with no fee taken from it — use our net settlement calculator