Pharmacy Lien vs. ERISA Health Plan: What PI Attorneys Need to Know

James Wong — Founder & Pharmacist, LienScripts | November 25, 2025 | 9 min read

ERISA-governed employer health plans can deny PI-related medication coverage and assert subrogation rights at settlement. A pharmacy lien provides medication access when ERISA coverage fails — and understanding the interaction at settlement is critical for PI attorneys.

The ERISA Problem in Personal Injury Cases

When a personal injury client has employer-sponsored health insurance, the first instinct is that insurance should cover their accident-related prescriptions. Often it does — but a significant and growing category of employer health plans operates under a federal law that changes the rules in ways that directly affect PI attorneys and their clients.

That law is ERISA — the Employee Retirement Income Security Act of 1974, 29 U.S.C. § 1001 et seq. ERISA governs employer-sponsored benefits plans and is enforced at the federal level. When a health plan is ERISA-governed (specifically, when it is self-funded — meaning the employer itself bears the risk of claims rather than buying insurance), it is largely exempt from state insurance regulations.

This ERISA preemption (29 U.S.C. § 1144) has major consequences for PI clients:

1. State mandated benefit laws don't apply. In states with laws requiring health plans to cover PI-related treatment without subrogation rights or delays, ERISA self-funded plans are exempt.
2. ERISA plans can exclude or delay PI coverage. Some ERISA plans contain "non-duplication" or "coordination of benefits" provisions that allow them to deny payment for PI-related injuries pending the tort recovery.
3. ERISA plans have strong subrogation/reimbursement rights. Under Sereboff v. Mid Atlantic Medical Services (2006), ERISA plans can sue the plaintiff directly for reimbursement of benefits paid — from specifically identifiable settlement funds.

[!KEY] When a client's employer health plan is ERISA self-funded and refuses to cover PI-related prescriptions — or when coverage is denied pending the lawsuit — a pharmacy lien is often the only mechanism that provides immediate access to medications at $0 upfront. The lien resolves at settlement; ERISA reimbursement rights and the lien interact but do not occupy the same priority position.

Identifying ERISA Self-Funded Plans

The critical distinction is between fully insured and self-funded plans:

Fully insured plans: The employer pays premiums to a commercial insurer (Aetna, Blue Cross, United), and the insurer bears the risk of claims. These plans ARE subject to state insurance regulations. The state's collateral source rule and PI coverage mandates apply.

Self-funded (self-insured) plans: The employer funds claims from its own assets. A third-party administrator (TPA) like Aetna or United may administer the plan, but the employer bears the risk. These plans are NOT subject to state insurance regulations — only ERISA governs.

How to identify a self-funded plan:

• Look at the patient's insurance card and Summary Plan Description (SPD)
• Self-funded plans will have language like "This plan is self-funded" or "administered by [TPA]"
• If the EOB comes from a major insurer but the employer is paying claims, it's likely self-funded
• The SPD contains a clause identifying the plan as subject to ERISA

Most large employers (500+ employees) have self-funded plans. Self-funding is less common but growing among mid-size employers. Small employers (under 50 employees) are typically fully insured.

ERISA Coverage Denial Scenarios in PI Cases

Scenario 1: Coordination of Benefits denial

The ERISA plan's coverage contains a "coordination of benefits" provision that makes the plan secondary when a third-party tort recovery is available. When the plan learns the patient has a pending PI claim, it denies coverage and asserts that the liability insurer should pay first.

Result: The patient cannot fill prescriptions because the health plan denies and the liability insurer hasn't paid a judgment yet (it might never if liability is disputed). A pharmacy lien resolves the gap.

Scenario 2: "Non-duplication" exclusion

The plan explicitly excludes coverage for injuries "arising from the negligence of a third party" to the extent recovery is available. This language is more aggressive than coordination of benefits — it treats PI-related treatment as categorically excluded.

Result: Same as Scenario 1. Pharmacy lien provides access; the question of ERISA subrogation rights is addressed separately at settlement.

Scenario 3: The plan pays, then asserts subrogation

The ERISA plan pays for PI-related prescriptions throughout the treatment period. At settlement, it asserts a reimbursement claim (not technically a "lien" but functionally similar) against specifically identified settlement funds.

Result: At settlement, the ERISA plan's reimbursement claim and the pharmacy lien are both obligations against the settlement proceeds. Priority is determined by the nature of each claim — ERISA plans have strong reimbursement rights under Sereboff, but the plan may also negotiate a reduction.

ERISA Subrogation vs. Pharmacy Lien: How They Interact at Settlement

When both an ERISA plan reimbursement claim and a pharmacy lien exist, they generally occupy different positions in the settlement waterfall:

ERISA plan reimbursement claim: Applies to settlement dollars representing the same claims the plan paid (medical expenses covered by the plan). The Sereboff framework requires the plan to trace its claim to specifically identified funds in the plaintiff's possession.

Pharmacy lien: Applies to the plaintiff's net share of the settlement proceeds — the amount paid by the defendant that is allocated to the plaintiff after attorney fees and government liens. The pharmacy lien reflects medications that the plan did NOT pay (because it denied coverage, or because the client was uninsured).

They typically do not directly compete for the same dollar — because the ERISA plan only has subrogation rights over amounts it actually paid, while the pharmacy lien covers amounts it paid (which the ERISA plan denied).

[!NOTE] The McCutchen decision (U.S. Supreme Court, 2013) established that ERISA plans must honor equitable principles — including the make-whole doctrine in some circuits — when asserting reimbursement rights. This is a basis for negotiating ERISA plan reimbursement claims, similar to negotiating a hospital lien.

Key ERISA Case Law for PI Attorneys

Sereboff v. Mid Atlantic Medical Services, Inc. (2006): Established that ERISA plans can bring equitable actions for reimbursement under 29 U.S.C. § 1132(a)(3) from specifically identifiable funds in the plaintiff's possession.

US Airways, Inc. v. McCutchen (2013): ERISA plans must honor plan terms but equitable defenses may limit reimbursement; some circuits apply the make-whole doctrine unless the plan explicitly overrides it.

Montanile v. Board of Trustees of National Elevator Industry Health Benefit Plan (2016): If a plan participant dissipates settlement proceeds before the plan asserts its claim, the plan cannot sue for out-of-pocket reimbursement from general assets (only traceable funds).

These cases matter because they define the ERISA plan's actual recovery rights — and give PI attorneys tools to negotiate plan reimbursement claims at settlement.

Practical Strategy for PI Attorneys

[!KEY] At intake, determine whether the client's health plan is ERISA self-funded — most large employer plans are — because a self-funded plan can deny PI-related prescriptions from day one, and the pharmacy lien needs to be in place before the first denial, not after the patient has already gone without medications.

At intake:

• Determine whether the client's health insurance is ERISA self-funded or fully insured
• If ERISA self-funded, assess whether the plan has a COB or non-duplication provision
• If the plan is likely to deny PI coverage, enroll the client in a pharmacy lien program before the first prescription

During the case:

• If the ERISA plan pays for PI medications, document which medications were paid vs. denied
• When coverage is denied, activate the pharmacy lien from the denial date forward
• Obtain a Summary Plan Description to understand the plan's subrogation/reimbursement terms

At settlement:

• Calculate ERISA plan's reimbursement claim (limited to amounts actually paid by the plan)
• Calculate pharmacy lien amount (reflecting medications the plan didn't cover)
• Negotiate both using the make-whole doctrine and McCutchen equitable principles where applicable
• Document the allocation in settlement disbursement paperwork

[!KEY] ERISA subrogation rights and pharmacy lien obligations typically do not compete for the same dollars — the ERISA plan can only trace to claims it actually paid, while the pharmacy lien covers prescriptions the plan denied, so the two are additive obligations at settlement rather than competing ones.

Related Resources

• What Is ERISA Preemption in Personal Injury?
• UnitedHealthcare, Aetna and ERISA Pharmacy Liens
• Health Insurance Subrogation vs. Pharmacy Lien
• Insurance Denial and Medication Access
• Competing Liens at Settlement

[!SOURCE] 29 U.S.C. § 1144 — ERISA Preemption of State Law — The ERISA preemption clause that exempts self-funded employer health plans from state insurance regulations, including state benefit mandates and collateral source rules.

[!SOURCE] Sereboff v. Mid Atlantic Medical Services, 547 U.S. 356 (2006) — Supreme Court decision establishing ERISA plans' equitable reimbursement rights from specifically identifiable settlement funds held by the plaintiff.