Letter of Protection: What It Is, When You Need One, and How to Get One

What a Letter of Protection Actually Does

The short answer most plaintiffs need first: a letter of protection is a written promise from you and your attorney to a medical provider that they will be paid out of your future settlement in exchange for treating you now. No money changes hands upfront. No health insurance is billed. The provider agrees to wait, sometimes for years, in return for a claim against the settlement fund when your case resolves.

Letters of protection — plaintiffs and attorneys usually just call them LOPs — are one of the most important tools in personal injury practice, and one of the least understood by the people who actually rely on them. This guide explains what an LOP is (and what it is not), when a provider will accept one, how to get one, and — through concrete numbers — what actually happens to your money when your case finally settles.

A Working Definition (Without the Legalese)

A letter of protection is a contract. Three parties sign it, though only two of them — your attorney and the provider — usually sign the document itself:

• You, the plaintiff, are responsible for the medical charges. That does not go away because you signed an LOP. If the settlement is not enough to pay the provider in full, the provider can still pursue you personally for the balance (unless the LOP or a lien reduction says otherwise, which is why the language matters).
• Your attorney agrees to hold the settlement funds in trust and pay the provider from those funds before releasing your net to you.
• The provider agrees to defer billing you and to refrain from sending your bills to collections while your case is pending.

What an LOP is not:

• It is not a loan. No interest accrues (unless the LOP itself specifies it, which is unusual).
• It is not a lien in the technical sense. A hospital lien is filed publicly under a state statute and attaches to the settlement by operation of law. An LOP is a private contract between the parties. Providers often file both — an LOP to secure treatment access and a lien to preserve statutory priority — and understanding the difference matters at settlement time.
• It is not insurance. Your health plan is not billed. If you have health insurance and use an LOP anyway, you are trading a lower-cost payment path for a higher-cost one — a trade-off we explain below and in our companion article on treatment gaps and funding approval.
• It is not a guarantee that the provider will actually treat you. Whether a provider accepts your specific LOP depends on the provider's policies, your attorney's reputation, and the strength of your case.

Why LOPs Exist: The Treatment Gap in Personal Injury

Personal injury cases produce a predictable financial trap. A plaintiff is hurt through someone else's fault, needs medical care that costs thousands of dollars, and often cannot work while recovering. The at-fault party's insurance carrier will not pay a dollar until liability is resolved — a process that routinely takes twelve to thirty-six months.

Options during that window are limited. Health insurance, if the plaintiff has it, covers care but creates its own settlement-time complication: the health plan will demand reimbursement, and with ERISA plans and Medicare, that reimbursement can be aggressive. Uninsured plaintiffs, or those whose plans refuse to cover accident-related treatment (a common practice known as "accident denial"), have even fewer options.

The LOP was invented to solve this problem. Providers who work with personal injury attorneys will treat plaintiffs on the strength of the case rather than the strength of the plaintiff's wallet. In exchange, the provider charges rates it could not typically collect from health insurance — and gets paid, when it gets paid, out of the top of the settlement.

Letter of Protection vs Medical Lien vs Health Insurance: The Real Differences

Most plaintiff-facing content treats these three payment paths as interchangeable. They are not. Each carries different upfront costs, different settlement-time consequences, and different negotiating leverage at the end of the case. The table below maps the differences across the five dimensions that actually determine how much you take home.

Dimension	Letter of Protection (LOP)	Statutory Medical Lien	Health Insurance
Legal instrument	Private contract between plaintiff, attorney, and provider	Public filing under a state hospital lien statute (e.g., Cal. Civ. Code § 3045.1, Tex. Prop. Code § 55.002, Ohio Rev. Code § 5160.36)	Contract between plaintiff and insurer; subject to ERISA if self-funded employer plan
Who pays upfront	Nobody — payment is deferred entirely to settlement	Provider treats you, then files a lien; some collection activity may still occur	Insurer pays provider immediately; you owe copays / deductibles
Billed amount	Full "chargemaster" rate — no insurance discount applied	Full chargemaster rate	Contracted (discounted) rate — typically 30–60% of chargemaster
What comes out of the settlement	Negotiated LOP amount (often 40–60% of billed) after attorney negotiation	Lien amount, capped by state law's common-fund reduction where applicable	Subrogation demand — often significant, especially ERISA plans (see US Airways v. McCutchen)
Leverage at settlement	High — provider needs your attorney's cooperation to get paid	Medium — statute controls; some room for common-fund reduction	Low to medium — depends on plan language; ERISA plans are hardest to reduce

Two facts hidden in this table matter more than the rest. First: an LOP typically produces a higher gross bill than health insurance — the provider bills at full chargemaster rates rather than the discounted rates a health insurer would pay. Second: because that bill is negotiable at settlement, the actual reduction from your settlement is often lower than health-insurance subrogation would have taken. Whether the LOP path or the insurance path leaves more money in your pocket depends on your case, your state, and your attorney's negotiation — which is exactly why this decision is a real one, not a default.

When Providers Actually Accept LOPs (and When They Don't)

Not every provider will sign an LOP. Understanding which ones do — and why — will save you weeks of phone calls.

Providers who accept LOPs regularly

• Orthopedic surgeons and pain-management specialists who have built personal-injury-focused practices. Many of these providers get more than half of their revenue from LOP work and are comfortable with the process.
• Physical therapists at PI-focused clinics — often referred by your attorney.
• Chiropractors, particularly in states with high MVA case volume.
• Diagnostic imaging centers (MRI, CT) that partner with PI-focused referral networks.
• Certain surgical centers that have PI-friendly billing departments.

Providers who rarely accept LOPs

• Hospitals for emergency care. If you were taken to the ER after an accident, that bill is going to be handled through a statutory hospital lien, insurance, or direct billing — not an LOP. Hospitals treat first and negotiate later.
• Large hospital systems for scheduled procedures. Their billing departments are built around insurance workflows and self-pay. They will accept liens under state statute but almost never sign an LOP.
• Primary care physicians without PI experience.
• Out-of-network specialists who have no relationship with your attorney's firm.

The pattern is straightforward: providers who accept LOPs are those who have decided that PI cases are a business line and have built billing infrastructure to handle deferred collection. Providers who don't accept LOPs aren't refusing out of hostility — they simply aren't set up for it.

Two practical implications:

1. Ask your attorney for a provider referral before you start calling around. Personal injury firms maintain informal networks of LOP-friendly providers, and a referral from your attorney carries weight the same request from you would not.
2. If a provider refuses your LOP, that is not a signal your case is weak. It usually means the provider doesn't participate in LOP-based care at all. The next call — to a PI-focused provider your attorney knows — will often go differently.

How to Get a Letter of Protection: Step by Step

The process is more collaborative than most plaintiffs expect. Here is what actually happens:

Step 1 — Tell your attorney what treatment you need

Do not wait until you have already tried to book the appointment yourself. Your attorney's involvement is what makes the LOP work — the attorney's promise to hold funds in trust and pay from settlement proceeds is the reason a provider agrees to treat on deferred billing. If you try to line up care first and loop in your attorney later, you will spend weeks stuck in a chicken-and-egg problem with the provider's billing office.

Step 2 — Your attorney identifies an LOP-accepting provider

For common needs (orthopedic evaluation, PT, MRI, pain management), most PI attorneys have a short list of providers they refer to regularly. For less common specialties (neurology, plastic surgery, complex spinal procedures), the search may take longer.

Step 3 — The provider requests case information

Expect the provider's billing office to ask your attorney for a case memo covering: the accident date, the injuries, the responsible defendant(s), whether liability is contested, insurance limits, and an estimated case value. The provider is underwriting the case just like a pre-settlement funder would — deciding whether the settlement is likely to be big enough to cover the treatment they are about to give you.

Step 4 — Your attorney drafts and sends the LOP

The document itself is usually one to two pages. It identifies you, the attorney, the provider, and the case; states that the provider will treat you and refrain from collection activity; and states that the attorney will hold any settlement funds in trust and pay the provider before disbursing net proceeds to you. Some LOPs include specific language about interest, lien priority, and what happens if the case loses. All of that is negotiable.

Step 5 — The provider countersigns (or asks for changes)

Common changes: increased interest terms, a shorter time window before the LOP expires, priority language that puts the provider ahead of other lienholders, or a personal-guarantee clause that keeps you personally on the hook if the settlement falls short. Your attorney will negotiate what makes sense — this is one of the practical reasons to have a PI-focused attorney rather than a generalist.

Step 6 — You start treatment

Once signed, you can be treated exactly as any insured patient would be. Some providers require you to sign an intake acknowledgment confirming you understand the treatment is being provided under an LOP and that you remain personally responsible for the bill. Read that document carefully; the language there is what actually binds you at settlement.

What Actually Happens at Settlement: A Real-Money Walk-Through

The moment your case settles, the LOP wakes up. Here is a concrete walk-through using round numbers.

Without negotiation, the waterfall looks like this:

Item	Amount
Gross settlement	$60,000
Attorney's fee (33.33%)	-$20,000
Case costs	-$2,500
LOP bills (billed amounts)	-$22,500
Net to plaintiff (no negotiation)	$15,000

Now the same case with typical LOP negotiation. Attorneys routinely negotiate LOP bills down to 40–60% of billed amounts when the settlement is limited relative to the treatment. Assume a 50% blended reduction:

Item	Amount
Gross settlement	$60,000
Attorney's fee (33.33%)	-$20,000
Case costs	-$2,500
Negotiated LOP payoff (50% of $22,500)	-$11,250
Net to plaintiff (after negotiation)	$26,250

The $11,250 difference is not luck. It's the result of the attorney working each provider individually — arguing that the plaintiff's share must be adequate to compensate for the injury itself, invoking common-fund principles where applicable, and pointing out that partial payment beats collection risk on an unpaid balance. Providers accept these reductions because chasing an uninsured plaintiff for a five-figure bill after a limited settlement is worse.

Two things plaintiffs often miss: not every LOP is negotiable — a well-drafted one with clear priority language and personal-guarantee terms is harder to reduce than a boilerplate one. And negotiation takes time. The gap between "case settled" and "check in hand" is often four to eight weeks precisely because these conversations are happening in the background.

Common LOP Pitfalls Plaintiffs (and Some Attorneys) Miss

Pitfall 1 — Using an LOP when health insurance would cover the care

Some plaintiffs sign LOPs reflexively because their attorney's firm has a preferred referral network. If you have health insurance that covers accident-related care, using it and letting the health plan pursue subrogation is often — not always, but often — a better economic outcome. The exception is when your health plan is a self-funded ERISA plan that will assert first-dollar recovery; there, the LOP path can be better because negotiated LOPs are often more reducible than ERISA liens. Have an honest conversation with your attorney about which path is better for your specific plan.

Pitfall 2 — Signing an LOP with an interest-accrual clause

Most LOPs are interest-free. Some — particularly with pain-management specialists and surgical centers — include a clause that says the balance accrues interest, sometimes at 12% or more, if the case takes longer than a specified period. If your case runs three years, an interest clause can materially reduce your net. Read for it before you sign.

Pitfall 3 — Personal-guarantee acceleration language

Almost every LOP contains a clause stating that the plaintiff remains personally liable if the settlement is insufficient to cover the bills. That is standard. What is not standard is language that increases that exposure — for example, a clause providing that if the case is lost, the plaintiff must pay the entire bill within a short window like 90 days. If you cannot pay a $22,500 bill in cash today, do not sign an LOP that requires you to pay it in cash in ninety days if things go wrong.

Pitfall 4 — Treating with a provider your attorney has not vetted

Some providers have reputations for over-treating LOP cases — running up bills that look good for their own recovery but that make the case harder to settle because opposing counsel will point to inflated medicals and argue the treatment was litigation-driven. A provider vetted by your attorney will treat you honestly. A random online provider might not.

Pitfall 5 — Assuming the LOP resolves your health insurance obligations

If you have health insurance and let it pay some bills alongside LOP-covered treatment, the insurance carrier can still assert subrogation on the bills it paid. The LOP does not shield you from the health insurer's recovery rights. You can end up owing both LOP providers and the health plan.

Pitfall 6 — Waiting too long to convert to LOP

If you have already received treatment and racked up bills without an LOP, you can sometimes retroactively convert those bills to LOP status if the provider is willing. Ask early. The longer bills sit in collections, the harder retroactive conversion becomes — and the more damage your credit takes in the meantime.

How Pre-Settlement Funding Interacts with a Letter of Protection

Pre-settlement funding and LOPs solve related but different problems. An LOP protects your ability to receive medical care without paying upfront. Pre-settlement funding provides cash for everything else — rent, groceries, utilities, childcare, transportation — while the case is pending. Plaintiffs with catastrophic injuries commonly rely on both.

When a funder underwrites your case, they subtract expected LOP payoff (and attorney fees, and any liens) from projected settlement to estimate net available for the advance and their repayment. Higher billed LOP amounts mean smaller advance headroom — not because the case is weak but because the payoff waterfall leaves less room. See our companion pillars on how funders evaluate case merit and the factors that determine your advance amount.

State Variations That Matter

LOPs are creatures of contract, so most state law does not directly regulate them the way state hospital lien statutes do. But a handful of state-specific rules affect how they operate:

• Florida: HB 837 (2023) imposes specific disclosure rules on LOPs and requires attorneys to inform patients about the difference between LOP billing and insurance billing. Failure to comply can affect admissibility of LOP bills at trial.
• Texas: A 2021 Texas Supreme Court decision (In re K & L Auto Crushers) lets defendants compel discovery of the amounts LOP providers actually collect (as opposed to charge). This has pushed LOP economics in Texas toward more disciplined billing.
• California: The Howell v. Hamilton Meats line of cases established that plaintiffs recover only reasonable medical expenses, which affects how LOP charges are presented at trial and settled with defendants.
• Ohio: Ohio's hospital lien statute coexists with LOPs; providers commonly use both instruments in parallel. See our Ohio funding regulation guide for the state's overall PI-financing landscape.

State-specific LOP practice will get its own deeper treatment as we build out the state-guide series.

What Actual LOP Language Looks Like

Because so few plaintiffs have ever read an LOP before signing one, it helps to see the structure. A well-drafted LOP is one or two pages and has five sections. Simplified example language:

Parties and Case. This Letter of Protection is entered into between [Patient], [Attorney and Firm], and [Provider] regarding a pending personal injury claim from an incident on [Date].

Provider's Undertaking. Provider agrees to treat Patient and to refrain from billing Patient directly, sending balances to collections, or reporting the account to credit bureaus, so long as this Letter remains in effect.

Attorney's Undertaking. Attorney agrees to hold in trust any settlement proceeds and to pay Provider's balance, subject to good-faith negotiation, from those proceeds prior to disbursement to Patient.

Patient's Undertaking. Patient acknowledges personal responsibility for the treatment charges and that this Letter is not health insurance, is not a loan, and does not transfer the obligation to Attorney or any third party.

Termination. This Letter terminates upon (a) resolution of the underlying claim, (b) mutual written agreement, or (c) [24 or 36] months from signing, whichever occurs first.

The devil is in the modifications. An LOP that adds an interest clause, an accelerated payment window if the case is lost, or first-priority language ahead of attorney fees is a different document than a standard one. When your attorney reviews an LOP the provider has marked up, the markup is where the real economic exposure lives.

Talking to Your Attorney About LOP Options

The conversation to have with your attorney is not "should I sign this LOP?" It is "what are all of my options for accessing treatment while my case is pending, and which is best for my specific facts?" There are usually more options than plaintiffs realize:

• Health insurance with subrogation planning. If you have coverage and the plan is favorable, using it and letting the attorney negotiate subrogation at settlement.
• Hospital lien treatment. For emergency care, this is the default path and rarely optional.
• LOP with a vetted provider. For orthopedic, PT, pain management, and diagnostic imaging.
• Hybrid. Insurance for some care (primary care, some imaging), LOP for care the insurer won't cover (chiropractic, some PI-specific specialties).
• Self-pay with negotiated cash rates. Some providers offer significant cash discounts if you can pay upfront — sometimes at rates lower than either insurance or LOP would ultimately produce. Pre-settlement funding can bridge this option in a way LOPs cannot.

A plaintiff attorney worth working with will run the math on each option for your case rather than defaulting to the LOP path because the firm has a referral relationship. If you feel like the LOP path is being sold to you without discussion of alternatives, that is a signal to ask more questions. For attorneys reading this article who want to understand how Instabridge underwrites cases involving LOP-treated plaintiffs, see the attorney portal and our companion piece on how funders evaluate case merit.

The Bottom Line

A letter of protection is neither a favor from the provider nor a giveaway from your attorney. It is a contract that trades higher billed rates for deferred payment — and, used well, gets you the treatment you need without wrecking your credit or delaying recovery. Used carelessly, it can quietly consume your entire net settlement.

If you're navigating a personal injury case and considering LOP-based treatment, three things will keep you safe: involve your attorney before you sign anything, use providers your attorney knows and has worked with, and remember that pre-settlement funding and LOPs solve different problems. Plaintiffs with serious injuries often need both.

At Instabridge, we work with plaintiff attorneys across all fifty states. If your case is going to take months or years and you need cash to cover the gap while your attorney and your LOP providers do their work, apply for a pre-settlement advance — attorney-founded, non-recourse, and transparently priced. Approval decisions are typically returned within 24 hours of your attorney providing the case file.

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