PERSONAL INJURY | 2026-10-12

Phantom Damages in California Injury Cases: How Howell and Corenbaum Limit Medical-Bill Recovery — and What Evidence the Jury Can See

A hospital bills $150,000, insurance pays $42,000, and the balance is written off. What can an injured plaintiff recover, and what can the jury even be told? Howell capped past medical damages at the amount actually paid, and Corenbaum extended that logic to future medicals and barred the full billed amount as evidence. Together they reshaped how medical damages are proved in California.

In nearly every California personal-injury case, there is a gap — often a large one — between what a hospital or doctor bills for treatment and what is actually paid to satisfy the bill after insurance negotiates it down or writes part of it off. The difference, sometimes called “ phantom damages ,”

Medical expenses are usually the anchor of an injury claim — they are concrete, documented, and often drive the valuation of the entire case. But in California, the number on the hospital bill is not the number the plaintiff recovers, and it is frequently not even a number the jury gets to see. Two decisions, Howell and Corenbaum, built the modern framework, and a later case, Pebley, addressed how the rules apply to the uninsured. Understanding this framework is essential for any injured person trying to value a claim realistically and for any lawyer trying to prove medical damages the right way.

The Problem: Billed Charges Versus Amounts Paid

American medical billing produces two very different numbers for the same treatment. The “chargemaster” or billed rate is a list price that almost no one actually pays. Private insurers, Medicare, and Medicaid negotiate or set far lower reimbursement rates, and the provider accepts the reduced payment as full satisfaction, writing off the balance as required by contract or law. So a surgery billed at $150,000 might be satisfied by a $42,000 insurance payment, with the remaining $108,000 written off and never collected from anyone. The question California courts had to answer was whether an injured plaintiff could recover that $108,000 write-off from the defendant as “medical expenses,” even though no one ever paid it and the plaintiff was never liable for it.

Howell v. Hamilton Meats: The Amount Actually Paid Is the Ceiling for Past Medicals

In Howell v. Hamilton Meats & Provisions, Inc. (2011) 52 Cal.4th 541, the California Supreme Court answered that question for past medical expenses. The plaintiff was injured in a collision, treated, and her providers accepted negotiated payments from her health insurer that were far below the amounts billed, writing off the difference. The Court held that a plaintiff whose medical expenses have been paid at a negotiated rate may recover no more than the amount actually paid or incurred for past medical services — not the higher amount originally billed. The Court reasoned that the written-off portion is not a loss the plaintiff ever sustained: the plaintiff was never liable for it, no one ever paid it, and awarding it would compensate for an expense that does not exist. The Court was careful about the collateral source rule — the doctrine that a defendant cannot reduce its liability by pointing to compensation the plaintiff received from an independent source like insurance. Howell held that the collateral source rule was not offended, because the negotiated write-off is not a “benefit” conferred on the plaintiff in the relevant sense; it is simply a price the provider agreed to accept, so there was no real loss to begin with. The practical result: for an insured plaintiff, past medical damages are generally capped at the amount actually paid to satisfy the bills.

Corenbaum v. Lampkin: Extending the Logic to Future Medicals and to Evidence

Howell expressly left open two questions it did not need to decide: whether the full billed amount could be used as evidence of the reasonable value of services (for purposes other than fixing past medical damages), and how the rule applied to future medical expenses. The Court of Appeal answered both in Corenbaum v. Lampkin (2013) 215 Cal.App.4th 1308. First, Corenbaum held that evidence of the full amount billed for past medical services is not admissible to prove the reasonable value of those services, because the billed amount is not a reasonable measure of value where it was never paid and would never be paid. Admitting it, the court reasoned, would improperly expose the jury to an inflated figure and risk inflating every damages number anchored to it. Second, Corenbaum held that the full billed amount likewise cannot be used to support an award of future medical expenses, nor as a basis for an expert’s opinion on the value of future care. In other words, the billed amount is not just non-recoverable — it is largely inadmissible, so the jury should not hear it at all when the purpose is to prove the value of care. Future medical damages must instead be proven through evidence of the reasonable value of the care the plaintiff will need, not by extrapolating from the inflated chargemaster rate.

What Evidence the Jury Can Actually See

The combined effect of Howell and Corenbaum is a careful set of evidentiary rules. For an insured plaintiff whose past bills were satisfied at a negotiated rate, the jury is generally shown the amount actually paid or incurred as the measure of past medical damages, and the inflated billed figure is excluded. To prove the reasonable value of past and future care, parties rely on competent evidence of what the care actually costs in the market — expert testimony on reasonable value, the negotiated and paid amounts, and other admissible indicators — rather than the chargemaster number. This is why skilled presentation of medical damages in California requires a plan: identifying what was actually paid, retaining experts who can opine on the reasonable value of future care without anchoring to billed charges, and keeping the inflated billed amounts out of the jury’s view where Corenbaum requires it. A plaintiff’s lawyer who simply stacks up the billed invoices and asks for that total will run into a wall; the recovery and the admissible evidence are both defined by what the care reasonably costs and what was actually paid.

The Uninsured Plaintiff: Pebley v. Santa Clara Organics

Howell and Corenbaum arose from insured plaintiffs whose bills were negotiated down. But what about a plaintiff who has no health insurance, or who chooses to treat outside insurance — for example, a patient who receives care on a medical lien, agreeing to pay the provider out of any recovery? The Court of Appeal addressed this in Pebley v. Santa Clara Organics, LLC (2018) 22 Cal.App.5th 1266. Pebley held that a plaintiff who is uninsured, or who chooses to be treated outside of available insurance, is treated like an uninsured plaintiff and may recover the reasonable value of the medical services, and that the full amount billed by lien-based providers may be relevant evidence of reasonable value — subject to the defense’s right to contest reasonableness. The distinction matters: Howell’s cap on recovery to the amount “paid” is tied to the situation where a negotiated payment satisfied the bill; where no such negotiated payment occurred and the plaintiff remains liable for the billed (or lien) amount, the analysis shifts to the reasonable value of the services actually rendered, with the billed amount carrying more evidentiary weight. This makes a plaintiff’s insurance status and treatment choices legally significant to how medical damages are proved.

The Collateral Source Rule Still Exists — Carefully Cabined

None of this abolished California’s collateral source rule. The rule still bars a defendant from reducing its liability by showing that the plaintiff’s losses were covered by an independent source such as the plaintiff’s own insurance, and it still prevents the jury from learning, as a general matter, that the plaintiff had insurance. Howell’s holding is narrower: it is not that insurance payments reduce damages, but that the written-off amount was never a loss the plaintiff sustained, so there is nothing for the collateral source rule to protect. The distinction is subtle but important in trial practice, because the mechanics of presenting the “amount paid” without improperly injecting the existence of insurance require care. Courts and counsel use stipulations, redactions, and limiting instructions to present the correct damages figure while honoring the collateral source rule’s prohibition on disclosing insurance.

Why These Rules Change How a Case Is Valued

For an injured Californian, Howell and Corenbaum mean that the sticker price of medical care overstates the recoverable medical-damages component of a claim, sometimes dramatically. A plaintiff and lawyer evaluating a case should look to amounts actually paid or incurred and to competent evidence of the reasonable value of future care, not to the billed totals. This does not make medical damages small — serious injuries generate large paid amounts and large future-care needs — but it does mean the analysis must be done correctly from the outset. It also affects strategy around treatment: a plaintiff treating on a lien or outside insurance may be in a different evidentiary posture under Pebley than one whose care was fully processed through health insurance. These are decisions best made early, with legal guidance, because they shape both the provable damages and the evidence the jury will ultimately see.

Non-Economic and Other Damages Are Separate

It is important to remember that the Howell/Corenbaum framework governs medical expense damages specifically. An injury victim’s recovery also includes non-economic damages — pain, suffering, disfigurement, loss of enjoyment of life — and other economic losses such as lost earnings and loss of earning capacity, which are proven under their own standards and are not capped by the amount paid for medical care. Because Corenbaum bars using the inflated billed amount to anchor other damages, counsel must prove those categories independently rather than by reference to the billed medicals. A thoughtful damages presentation treats medical expenses, future care, lost earnings, and non-economic harm as distinct, separately proven components of the whole.

How Trembach Law Firm Helps

Our firm helps California injury victims prove medical damages the way California law requires. We identify the amounts actually paid or incurred, retain and work with experts who can establish the reasonable value of future care without running afoul of Corenbaum, handle the special evidentiary posture of uninsured and lien-based plaintiffs under Pebley, and present damages at trial in a way that honors the collateral source rule while putting the correct, admissible figures before the jury. The goal is to maximize the recovery available under the law — not to chase inflated billed totals that the law does not allow.

Where the Rule Began: Hanif and the Road to Howell

Howell did not arrive from nowhere. The principle that a plaintiff recovers the amount actually paid, not the amount billed, traces to Hanif v. Housing Authority of Yolo County (1988) 200 Cal.App.3d 635, where the Court of Appeal held that a Medi-Cal patient whose care was paid at the reduced Medi-Cal rate could recover only that amount, not a higher “reasonable value,” because the plaintiff had incurred no greater liability. Nishihama v. City & County of San Francisco (2001) extended the reasoning to a privately insured plaintiff whose providers accepted negotiated rates. Howell then resolved a split and settled the rule at the Supreme Court level for insured plaintiffs generally, and Corenbaum extended it to the evidentiary and future-care questions Howell had reserved. Understanding this lineage helps explain why the rule is framed around the amount “paid or incurred”: the touchstone is the plaintiff’s actual liability, and where a negotiated payment discharged the bill in full, the written-off remainder was never a liability the plaintiff bore.

Liens and What the Plaintiff Actually Keeps

A separate but related issue is reimbursement liens. When a health insurer, Medi-Cal, Medicare, or an ERISA plan pays for accident-related treatment, it frequently holds a statutory or contractual right to be reimbursed out of the plaintiff’s recovery. These liens determine how much of a medical-damages award the plaintiff actually nets. Importantly, the Howell/Corenbaum rule and the lien rules interact: because recovery for past medicals is generally limited to the amount paid, and because that same paid amount is often what the lienholder seeks to recover, careful handling of the lien — including negotiating reductions under the common-fund doctrine and applicable statutory limits — can materially affect the plaintiff’s net recovery. Government liens (Medi-Cal under Welfare & Institutions Code provisions, and Medicare under federal law) carry their own reduction formulas and procedures. A plaintiff who wins a medical-damages award but ignores the lien landscape may keep far less than expected, which is why lien resolution is handled as an integral part of the damages recovery, not an afterthought.

Frequently Asked Questions

Can I recover the full amount my hospital billed?

Generally no, if your bills were satisfied for less through insurance. Under Howell v. Hamilton Meats (2011) 52 Cal.4th 541, an insured plaintiff recovers no more than the amount actually paid or incurred for past medical services, not the higher billed amount that was written off. The written-off “phantom” portion is not a loss you ever sustained.

What is a “phantom damage”?

It is the difference between what a provider bills and what is actually paid to satisfy the bill after insurance negotiates it down and writes off the balance. California does not allow recovery of that written-off difference as past medical damages for insured plaintiffs, and under Corenbaum the inflated billed amount is largely inadmissible as evidence of value.

What did Corenbaum add to Howell?

Corenbaum v. Lampkin (2013) 215 Cal.App.4th 1308 extended Howell in two ways: it held the full billed amount is not admissible to prove the reasonable value of past medical services, and it held the billed amount cannot be used to support future medical expenses or as a basis for an expert’s opinion on future care. So the inflated figure is not just non-recoverable — the jury generally should not hear it when the purpose is proving value.

How are future medical expenses proven then?

Through competent evidence of the reasonable value of the future care you will need — typically expert testimony on the cost of that care — rather than by extrapolating from the chargemaster billed rate. Corenbaum bars anchoring future medicals to the inflated billed amount.

I don’t have health insurance. Do these limits apply to me?

Differently. Under Pebley v. Santa Clara Organics (2018) 22 Cal.App.5th 1266, an uninsured plaintiff, or one who chooses to treat outside insurance (for example on a medical lien), may recover the reasonable value of the services, and the billed amounts can be relevant evidence of that value, subject to the defense contesting reasonableness. Your insurance status and treatment choices affect how medical damages are proved.

Does this mean the jury learns I had insurance?

No. The collateral source rule still generally prevents the jury from being told you had insurance. Howell did not change that; it held only that the written-off amount was never a loss. Counsel use stipulations, redactions, and limiting instructions to present the correct “amount paid” figure without improperly disclosing insurance.

Do these rules reduce my pain-and-suffering or lost-wages damages?

No. Howell and Corenbaum govern medical-expense damages. Non-economic damages (pain, suffering, loss of enjoyment) and other economic losses (lost earnings, loss of earning capacity) are proven under their own standards and are not capped by the amount paid for medical care — though Corenbaum means you cannot anchor those figures to the inflated billed medicals.

How do I value my injury claim correctly?

Start with what was actually paid or incurred for past care, add competent evidence of the reasonable value of future care, and add the separate categories of lost earnings and non-economic harm — all proven the way California law requires. Getting this right from the outset is essential. Call Trembach Law Firm at (213) 645-2246 for a free evaluation.

Talk to a California Injury Lawyer About Your Medical Damages

Howell and Corenbaum reshaped how medical damages are recovered and proved in California, and Pebley added a crucial rule for the uninsured. Valuing an injury claim correctly means knowing what was actually paid, how to prove the reasonable value of future care, and what the jury is allowed to see. Trembach Law Firm, led by Anatolii Trembach (LL.M.; admitted in California), helps injury victims maximize the medical-damages component of their recovery within the limits the law imposes. Call (213) 645-2246 for a confidential consultation.

Contact Trembach Law Firm at (818) 514-7680 for a confidential consultation.

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