The lien that can double while you are not looking
Traditional Medicare's conditional-payment process is familiar territory: you request the conditional-payment letter, you dispute unrelated charges, you resolve before disbursement. Medicare Advantage plans are a different animal, and treating them like ordinary provider liens is how firms end up writing a check twice. A Medicare Advantage organization that is not repaid from a third-party recovery can pursue a private cause of action for double the amount it laid out, and the exposure runs to the lawyer and the firm, not just the client.
Why Part C is not traditional Medicare
Roughly half of Medicare beneficiaries now receive their benefits through Part C, meaning a private insurer administers the coverage under contract with the government. Those plans pay claims, and when the injury is someone else's fault, they assert the same secondary-payer recovery rights the government holds. The catch is the enforcement tool. The Medicare Secondary Payer Act contains a private cause of action that authorizes a recovery of double the payment when a primary payer fails to reimburse. The federal courts of appeals that have addressed the question have largely agreed that Medicare Advantage organizations may invoke that double-damages remedy.
The controlling decision most practitioners cite is Humana Medical Plan v. Western Heritage Insurance Co., where the Eleventh Circuit held in 2016 that a Medicare Advantage plan could maintain the private cause of action and recover double the amount of its claim. Other circuits have followed the same logic. The practical result is that ignoring a Part C plan is far more dangerous than ignoring an ordinary medical bill, because the number can grow to twice the underlying payment.
The identification problem
The first difficulty is that these plans do not announce themselves the way traditional Medicare does. There is no single conditional-payment portal for the universe of Part C plans, and a client will often describe a plan by its brand name without realizing it is Medicare Advantage. Miss the plan, disburse the settlement, and the recovery contact arrives months later demanding double.
- Ask every Medicare-eligible client, in writing, whether their coverage is traditional Medicare or a Medicare Advantage plan, and get the plan name, member ID, and card.
- Confirm the plan's status directly rather than relying on the client's understanding of their own coverage.
- Send a written reimbursement inquiry to the plan early, and document the request. Silence from the plan is not a release.
Reducing the demand
Part C plans are not immune to the reduction arguments that govern the rest of lien practice, but the leverage differs. Many Medicare Advantage plans assert reimbursement rights through contract language rather than pure statute, which means the terms of the plan document, and applicable state law on made-whole and common-fund doctrines, can matter. Pull the plan's summary of benefits and the reimbursement provision. Where the plan claims charges unrelated to the accident, dispute them on the same causation grounds you would use against conditional payments. Where the recovery is limited and the client would not be made whole, raise it, because the plan wants to avoid the cost and delay of litigating a private cause of action it may still have to prove up.
Procurement-cost sharing is often available as well. The attorney's fees and costs that produced the recovery can reduce what the plan nets, mirroring the allocation logic used across a disciplined lien-resolution practice. Get any reduction in writing and confirm it resolves the plan's full interest, not just a stated balance that could be supplemented later.
Protecting the disbursement
The safest posture is to resolve or reserve for the Part C interest before funds leave the trust account. If the plan has not responded despite documented requests, hold a reserve rather than disbursing against the risk of a doubled claim. Put the analysis in the settlement statement so the client understands why a portion is held, and so the file reflects that the firm treated the plan interest seriously.
The exposure is real enough that it belongs in the same first-week workflow as your Medicare and ERISA analysis. A Part C plan that surfaces after disbursement can turn a clean file into a firm liability, which is why identification, written inquiry, and a documented reserve are the through-line. For firms handling volume, the coordination between conditional payments, ERISA plan reimbursement, and Part C recovery is increasingly a firm-operations question as much as a legal one, and the ones that build a checklist around it are the ones that stop paying twice.