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Medical Liens and Reimbursement Obligations

When someone else has paid your medical bills, they may have a right to be repaid from your settlement. This guide explains the main types of liens and reimbursement claims and why they are worth understanding early.

Last reviewed October 14, 2026 · General information, not legal advice · How we write and review

What a lien or reimbursement claim is

A lien, in this context, is a legal claim against settlement money by someone who paid for, or provided, medical care related to the injury. A related concept is subrogation: the right of an insurer that paid benefits to step into the injured person’s shoes and recover from the at-fault party. In practice, these claims are usually resolved out of the settlement before the injured person receives the remainder.

Common types

Private health insurance and employer plans

Many health plans include reimbursement or subrogation provisions. For self-funded employer plans governed by the federal ERISA statute, the U.S. Supreme Court held in US Airways v. McCutchen (2013) that clear plan terms control the reimbursement claim, while the “common fund” doctrine (sharing the cost of the attorney fees that produced the recovery) can apply where the plan is silent on that point. Insured plans are often subject to state laws that may limit reimbursement. Which rules apply depends on the type of plan, so obtaining the plan documents matters.

Medicare

Under the Medicare Secondary Payer provisions, when a liability insurer is responsible for injury-related care, Medicare’s payments are “conditional” and Medicare has a right to be repaid from the settlement. The federal government can pursue recovery, and the statute provides for remedies against parties who fail to reimburse. Medicare beneficiaries with a claim typically need to report the claim and obtain a conditional payment amount before final distribution.

Medicaid

Federal law requires state Medicaid programs to seek reimbursement from liable third parties. In Arkansas Department of Health and Human Services v. Ahlborn (2006), the Supreme Court held that a state’s recovery is limited to the portion of the settlement that represents medical expenses. In Gallardo v. Marstiller (2022), the Court held that a state may seek reimbursement from settlement amounts representing past and future medical care. State procedures for determining that portion differ.

Medical provider liens

Many states have statutes allowing hospitals or other providers to assert a lien for unpaid treatment, and some providers treat patients under a letter of protection, agreeing to wait for payment until the case resolves. Requirements such as notice and limits on the lien amount vary by state.

Auto medical coverage and other sources

Medical payments coverage or personal injury protection under an auto policy may also carry reimbursement rights, depending on the policy and state law. Other obligations, such as child support liens in some states, can also attach to settlements.

Why liens matter to the net amount

Hypothetical

A $40,000 settlement with a 33.33% fee calculated on the gross ($13,332), $1,100 in case expenses, and a $9,800 health plan reimbursement claim leaves $15,768. If the lien were negotiated down to $6,500, the remainder would be $19,068. Whether any reduction is possible depends on the plan terms and governing law.

Because liens can take a large share of a smaller settlement, they are often negotiated. Arguments for reduction may include the cost of obtaining the recovery, limited insurance coverage, or legal limits on the payer’s rights. None of these guarantee a reduction.

Practical steps

  • Tell your lawyer about every source that paid for treatment — health plan, Medicare, Medicaid, auto medical coverage, workers’ compensation.
  • Keep every explanation of benefits (EOB) and any letters asserting a lien or subrogation right.
  • Ask for a written final lien amount before settlement funds are distributed.
  • Do not assume an unpaid bill disappears because a case settled; ask how each outstanding balance will be handled.
  • Use the Net Settlement Calculator to see how different lien amounts change the outcome.

Sources and references

Important: This guide explains general concepts. Laws, deadlines and insurance terms vary by state and by policy, and their application depends on specific facts. For advice about a particular situation, consult a lawyer licensed in the relevant state. See our disclaimer.