Letters of Protection vs. Pharmacy Liens: What PI Attorneys Need to Know

James Wong — Founder & Pharmacist, LienScripts | February 21, 2026 | 8 min read

Letters of protection and pharmacy liens serve the same essential purpose — enabling injury patients to access care without upfront payment — but they work very differently. Learn why LOPs work poorly for ongoing pharmacy services, how pharmacy liens solve that problem, and how to use both tools together to build a complete lien-based care team.

The Access-to-Care Problem in Personal Injury

The most immediate practical challenge for a newly injured personal injury client is often not the legal case — it is paying for medical care while the case is pending. Health insurance may deny injury-related claims pending investigation. The client may be uninsured or underinsured. Workers' compensation coverage may be disputed. And the treating providers — orthopedic surgeons, pain management physicians, neurologists — typically will not treat an accident victim on a payment plan for what may be 18-24 months of care.

Personal injury attorneys have historically addressed this access-to-care problem through two mechanisms: letters of protection for medical providers and — increasingly — pharmacy lien programs for medication access. Understanding how these tools work, how they differ, and how they interact is essential to building a complete lien-based care team for your clients.

What Is a Letter of Protection?

A letter of protection (LOP) is a written commitment from the plaintiff's attorney to a healthcare provider — signed by both the attorney and the client — that guarantees payment for services from any settlement or judgment proceeds before the client receives any net recovery. The provider agrees to treat the patient immediately without collecting payment upfront, in reliance on the attorney's promise to pay from the eventual settlement.

The LOP functions as a contractual promise, not a lien in the traditional statutory sense. The attorney is, in effect, pledging the future settlement proceeds as security for the provider's willingness to treat today. Most LOPs include a provision directing the defense or insurance company to include the provider's name on any settlement check, ensuring the provider is paid directly rather than relying solely on the client's good faith after funds are disbursed.

LOPs are routinely used for:

• Orthopedic surgeons performing accident-related procedures
• MRI and imaging centers
• Physical therapy and chiropractic providers
• Pain management physicians
• Neurology and neuropsychology specialists
• Ambulatory surgery centers

The LOP model works well for these provider types because the services are discrete: a surgery is performed once, an MRI is taken on a specific date, a procedure is completed and billed. The provider extends credit for a fixed, known amount and then waits for payment.

[!KEY] A letter of protection is a contractual promise by the attorney to pay a provider from settlement proceeds. It is not a statutory lien — it is an obligation the attorney personally undertakes on behalf of the client. Failure to honor a valid LOP at settlement can constitute a breach of the attorney's professional duties and expose the attorney to a claim from the provider.

Why LOPs Work Poorly for Pharmacy Services

The LOP model breaks down when applied to an ongoing, continuous service like prescription medication. There are three structural problems with using a traditional LOP for pharmacy services:

Problem 1: Pharmacies cannot wait 12-24 months for payment on a revolving account. A surgery generates a single bill. A pharmacy fills prescriptions every 30 days, month after month, for the duration of treatment. Asking a retail or independent pharmacy to extend credit on a revolving basis for potentially two years — with no guarantee of repayment if the case settles for less than the accumulated medication bill — is not a practical business model for most pharmacies. Most retail pharmacies (Walgreens, CVS, local independents) will not accept an LOP for ongoing prescription fulfillment precisely because of this cash flow problem.

Problem 2: The amount is unknown and open-ended. An LOP for a surgical procedure covers a defined scope of service at a known (or estimable) price. A pharmacy LOP would cover an unknown number of future prescriptions at unknown drug prices across an unknown treatment period. Providers executing LOPs want certainty about their exposure; open-ended pharmacy LOPs create uncertainty that most providers will not accept.

Problem 3: Changes in prescription and prescriber create administrative complexity. During a 20-month treatment course, a personal injury patient may see five different prescribers, fill prescriptions at different locations, and change medications multiple times. Tracking a traditional LOP across this complexity — updating the document for each new prescriber, each new medication, each new fill location — would be administratively unworkable.

The Pharmacy Lien: An LOP Purpose-Built for Pharmacy Services

A pharmacy lien is the solution purpose-built for the pharmacy access-to-care problem that LOPs cannot efficiently solve. Rather than relying on a contractual promise from a single attorney to a single provider for a discrete service, a pharmacy lien is a formal assignment of a portion of settlement proceeds, recorded against the client's claim, in favor of a dedicated lien pharmacy that specializes in serving personal injury patients.

The pharmacy lien model addresses each of the LOP limitations:

Dedicated cash flow. A pharmacy lien program is specifically capitalized and operated to carry open-ended receivables across hundreds or thousands of active cases simultaneously. The lien pharmacy is not waiting for one check from one case — it is managing a portfolio of lien receivables as its core business model. This makes ongoing prescription fulfillment sustainable in a way it would not be for a retail pharmacy.

Flexible, fill-by-fill tracking. Each prescription fill is individually documented and added to the client's lien balance. There is no need to renegotiate or update the underlying agreement every time the prescriber changes or a new medication is added. The lien agreement covers all fills at the lien pharmacy across the life of the case.

Formal security interest against settlement proceeds. Unlike a traditional LOP, which is a contractual promise, the pharmacy lien is recorded as a security interest against the settlement proceeds. This gives the lien pharmacy a legally enforceable claim to repayment from the case resolution rather than relying solely on the attorney's promise.

[!KEY] The pharmacy lien is structurally superior to a traditional LOP for ongoing medication services because it is designed for the continuous, fill-by-fill nature of prescription management. The lien is documented, tracked, and secured against settlement proceeds without requiring the attorney to personally guarantee a revolving, open-ended pharmacy account.

Key Legal Differences Between LOPs and Pharmacy Liens

Understanding the legal distinction between a letter of protection and a pharmacy lien matters for how each is enforced and how each is treated at settlement.

Nature of the obligation. An LOP is an attorney's contractual promise, supported by the client's agreement. A pharmacy lien is a formal assignment of a right to payment from settlement proceeds, executed by the client at the time of enrollment.

Enforceability. Both are enforceable against the settlement proceeds by contract. However, a pharmacy lien recorded as a security interest may have additional enforceability protections under state law, depending on jurisdiction.

Effect on the settlement. Both create obligations that must be resolved before the client receives net proceeds. The attorney's duty to satisfy an outstanding LOP is an ethical obligation under the Rules of Professional Conduct in most states. The duty to satisfy the pharmacy lien is both a contractual and ethical obligation — the client assigned those settlement funds at enrollment.

Attorney liability exposure. If an attorney settles a case, disbursing client funds without satisfying a known LOP, the attorney may be liable to the provider for the full amount. The same analysis applies to pharmacy liens: disbursing client proceeds while ignoring a known pharmacy lien creates liability for the attorney.

[!SOURCE] The duty to satisfy liens and other claims on settlement funds before disbursement to the client is grounded in the professional responsibility rules governing attorney trust accounts and client funds. California Rules of Professional Conduct, Rule 1.15(d)(1), requires that attorneys promptly pay or deliver funds to third persons as requested or required by law, including funds subject to a claim by a third party. Violations of this rule — including failing to honor a valid LOP or pharmacy lien — can result in disciplinary action.

Why Some States Restrict LOPs

A growing number of states have enacted legislation restricting or regulating the use of letters of protection, primarily in response to concerns that the LOP model creates financial incentives that inflate medical billing and drive up insurance costs.

Florida enacted significant LOP reform legislation in 2023 (HB 837), restricting the amounts that LOP providers can recover at trial in personal injury cases and creating disclosure requirements. Similar legislation has been considered in Texas and other states.

These statutory restrictions target medical providers operating on LOPs — particularly surgeons and surgical facilities — and the concern that LOP-inflated bills distort the medical expense component of damages. Pharmacy lien programs, which operate on different economic fundamentals and within a regulated pharmacy practice framework, are not the primary target of LOP reform legislation, though attorneys in states with active LOP reform should monitor how new statutes are applied to different provider types.

Using LOPs and Pharmacy Liens Together in the Same Case

In a typical personal injury case with a complete lien-based care team, the attorney will use both LOPs and a pharmacy lien simultaneously:

• LOPs for: orthopedic surgeon, imaging center, pain management physician, physical therapy, neurology specialist
• Pharmacy lien for: all prescription medications across the treatment period

The two mechanisms complement each other. The LOP covers the episodic, procedure-based services where a discrete amount can be agreed upon with a single provider at a single point in time. The pharmacy lien covers the continuous, evolving medication management that no single LOP can efficiently address.

For the attorney, the practical workflow is straightforward: enroll the client in the pharmacy lien program at case intake, provide referrals to LOP-accepting providers for other treatment needs, and track all outstanding lien and LOP balances in the case management system so that the settlement waterfall can be calculated accurately when settlement is reached.

Ethical Obligations for Both LOPs and Pharmacy Liens

Attorneys who use both LOPs and pharmacy liens have clear ethical obligations with respect to each:

Disclosure to the client. The client must understand — before enrollment — that signing an LOP or pharmacy lien agreement creates an obligation that will be paid from their settlement proceeds, reducing their net recovery. This disclosure must be made at the time of the agreement, not at settlement.

Conflict screening. In jurisdictions where an attorney has a financial interest in a referral source — for example, where the attorney has a business relationship with the pharmacy lien company — conflict-of-interest and referral disclosure rules apply. Know your jurisdiction's rules before referring clients to any lien-based provider.

Satisfaction before disbursement. Both LOPs and pharmacy liens must be satisfied before disbursing net proceeds to the client. The attorney's trust account obligations require that funds subject to third-party claims not be released until those claims are resolved.

Negotiation authority. The attorney has authority to negotiate the balance of both LOPs and pharmacy liens at settlement on the client's behalf. Achieving a reduction in the pharmacy lien balance — particularly in a policy-limit case — directly increases the client's net recovery and is consistent with the attorney's duty of loyalty.

Practical Guidance for Building a Complete Lien-Based Care Team

For attorneys building a lien-based care infrastructure for their practice, the most effective approach combines a single pharmacy lien program enrollment at case intake with a network of LOP-accepting medical providers for each specialty needed:

1. At the initial client intake meeting, explain the lien-based care model clearly — no upfront payment, all bills paid from settlement.
2. Enroll the client in the pharmacy lien program and provide the pharmacy contact information so prescriptions can be directed there immediately.
3. Provide referrals to LOP-accepting providers for each anticipated treatment need: imaging, orthopedics, pain management, physical therapy, neurology.
4. Track all outstanding LOPs and the pharmacy lien balance in your case management system throughout the case.
5. At settlement, request final balances from all LOP providers and the pharmacy lien company simultaneously, negotiate reductions where appropriate, and calculate the full settlement waterfall before disbursing to the client.

The combination of LOPs for episodic medical services and a pharmacy lien for continuous medication management is the most comprehensive, practical solution to the access-to-care problem in personal injury practice.

Related Resources

• What Is a Pharmacy Lien?
• Complete Lien-Based Care Team for Personal Injury
• Lien Hierarchy at Settlement in Personal Injury
• Pharmacy Lien No Out-of-Pocket for Patients
• Can You Recommend a Pharmacy Lien Provider? Attorney FAQ
• Pharmacy Lien Paralegal and Staff Training