A letter of protection is a written agreement between your personal injury attorney and a medical provider that lets you get treatment now and pay the provider later out of your eventual settlement or court award. Your lawyer sends the letter promising that the provider’s bills will be paid from whatever your case recovers. The arrangement solves a real problem when you’re hurt, uninsured, and waiting on a claim to resolve. It also carries a risk most people don’t see coming: you personally owe every dollar billed, even if your case fails or settles for less than the charges, and the charges are usually much higher than what insurance would have paid for the same care.
How the Agreement Works
The process starts after you hire a personal injury attorney. If you need treatment but can’t pay upfront, your attorney drafts a letter addressed to the doctor, surgeon, imaging center, or hospital. It identifies you, describes the accident, and promises the provider’s charges will be paid directly from the proceeds of your legal claim once it resolves.
The provider then decides whether to accept. If they agree, you get treatment without paying at the time of service. The provider tracks every procedure, visit, and charge. When your case settles or a judgment comes in, your attorney pays the provider from the settlement funds before cutting you a check for the remainder.
Once the provider accepts the letter and delivers care in reliance on it, the agreement is generally binding. A court can enforce its terms if a dispute arises. That enforceability runs in both directions. Your attorney is obligated to pay the provider from settlement proceeds, and you remain personally responsible for the bills regardless of how the case turns out.
When Attorneys Use These Letters
These letters fill a specific gap. They’re most useful when you have no health insurance and need care you can’t afford, when your health insurer refuses to cover accident-related treatment, or when the at-fault party’s liability insurer is disputing the claim and won’t authorize payments. Without the letter in these situations, you might skip treatment or delay it long enough to hurt both your recovery and the value of your case.
Not every provider will accept one. Hospitals with established billing departments often prefer to bill health insurance directly. Smaller practices may not have the financial cushion to wait years for payment on an uncertain claim. Your attorney typically has relationships with providers who regularly accept these arrangements, so ask directly who they work with if you’re struggling to find treatment.
Why the Bills Run Higher Than Insurance Rates
This is the part that surprises people most. Providers who treat patients under a letter of protection routinely charge far more than they would bill a health insurer for the same procedures.
Health insurance companies negotiate discounted rates with hospitals and doctors. When you use insurance, the provider accepts those pre-negotiated amounts. Under a letter of protection, no negotiated rate exists. The provider can charge their full, undiscounted price for every service. They also know they might not get paid at all if the case fails, and they’ll wait months or years for payment either way. Many add a premium to compensate for the risk and the delay.
The gap can be staggering. Investigative reporting has uncovered cases where private insurance would have paid roughly $8,000 for services billed at over $76,000 under a letter of protection. In another, a spine surgeon charged nearly $400,000 for procedures that Medicare would have reimbursed at less than $20,000. Billing experts reviewing these charges regularly find them at four to ten times what they’d consider usual and customary rates.
The practical consequence: even if you win, inflated charges can consume most or all of your settlement.
What You Owe if the Case Fails or Settles Short
Signing the letter does not shift financial risk to your attorney, and it does not make the provider’s payment contingent on winning. It shifts the timing of payment, not the obligation. You’re personally on the hook for the full billed amount.
Three scenarios tend to cause real financial pain:
- Your case fails. If the at-fault party isn’t found liable, or if liability is unclear and no settlement materializes, you owe the full amount of every bill accumulated under the letter.
- The settlement is too small. If the at-fault driver carried minimum insurance and your medical bills exceeded the policy limit, treatment costs can dwarf your recovery. One documented case involved a patient who received a $75,000 settlement but had accumulated over $850,000 in charges.
- Bills balloon beyond expectations. Unlike health insurance, where you know your deductible and out-of-pocket maximum going in, these costs are open-ended. You won’t see a final number until treatment wraps up and your case resolves.
If the case ends without enough money to cover the balance, the provider can send unpaid bills to collections, sue you, or take other steps to recover. Medical debt can still appear on your credit report. The Consumer Financial Protection Bureau finalized a rule in early 2025 that would have removed medical bills from credit reports, but a federal court vacated the rule in July 2025, leaving prior reporting practices in place.1Consumer Financial Protection Bureau. CFPB Finalizes Rule to Remove Medical Bills from Credit Reports
Medical Liens on Top of the Letter
Many providers who accept a letter of protection also file a medical lien against your future settlement. A lien is a legal claim on the money your case recovers, and it means the provider gets paid before you see a dollar. Most states have hospital and medical lien statutes that let providers formalize that right by filing paperwork with a county office and notifying the responsible parties. Once properly filed, your attorney is legally obligated to address the lien before disbursing settlement funds to you.
Attorney ethics rules reinforce this. A lawyer who holds settlement funds and knows a third party has a lawful claim must hold the disputed amount in a trust account until the claim is resolved. Your attorney cannot ignore a valid lien and hand you the full check.
The combination of the letter and a perfected lien gives the provider two layers of protection: a contractual promise to pay and a statutory right to the funds. For you, it means your proceeds may be significantly reduced before anything reaches your pocket.
Negotiating the Bills Down After Settlement
The charges aren’t always final. After your case settles, your attorney can negotiate with each provider to reduce the amount owed, and experienced personal injury attorneys treat this as a routine part of disbursement.
Common grounds for negotiation include billing errors, charges for procedures unrelated to the accident, fees that exceed what’s reasonable for the service, and the simple reality that the settlement may not be large enough to pay everyone in full. Providers who accepted the risk generally understand that some payment now beats collecting nothing or suing a patient with limited resources.
Offering a lump-sum payment can produce meaningful discounts. Providers who have waited months or years may accept a reduced amount in exchange for immediate, guaranteed money. Once your attorney reaches an agreement, the provider issues written confirmation of the reduced balance or a full release. Successful negotiations can save thousands or tens of thousands of dollars.
Ask your attorney upfront whether they routinely negotiate these bills and how they approach it. An attorney who treats the billed amount as final is leaving your money on the table.
When Health Insurance Is the Better Route
If you have health insurance, using it for accident-related treatment is often the smarter financial move. The core advantage is price. Your insurer’s negotiated rates with hospitals and doctors are dramatically lower than what most providers charge under a letter of protection. You’ll pay your normal deductible and copays, but the total cost of your care will almost certainly be a fraction of what letter-of-protection billing would produce.
The tradeoff is subrogation. If your health insurer pays for your accident-related treatment and you later recover money from the at-fault party, your insurer has the right to seek reimbursement for what it paid. Your attorney will need to negotiate that subrogation claim, much like negotiating letter-of-protection bills. Even after accounting for it, the math usually works out better because the starting number is so much lower.
A letter of protection makes the most sense when you genuinely have no insurance, when your insurer explicitly denies coverage for the treatment, or when you need care from a specialist your insurance won’t cover. In every other situation, exhaust your insurance options first and treat the letter as a last resort.
What to Ask Before You Sign
If a letter of protection is your best or only option, a few steps can reduce your exposure. Ask your attorney to explain, in plain language, what happens to your medical bills if the case fails or settles for less than the total charges. Get a clear answer on whether the provider’s billing rates are negotiable after settlement. Ask whether the provider plans to file a medical lien in addition to the letter, and what that means for your share of the recovery.
Keep your own records of every treatment session, every bill, and every communication between your attorney and the provider. If bills look unreasonably high, raise it early. Be realistic about the value of your case relative to the treatment costs piling up. An experienced attorney will tell you honestly when the math doesn’t work and will steer you toward insurance or other options before letting the balance spiral beyond what the case can support.