Arizona Removes the Emergency Room Liability Shield: A Seismic Shift in ER Malpractice Law

For more than two decades, Arizona's emergency medicine community operated under a legal framework that offered meaningful protection against malpractice claims. Under Arizona Revised Statutes § 36-2221 and related provisions, emergency care providers — including physicians, nurses, and hospitals — could only be held liable for malpractice if a plaintiff proved gross negligence, not merely ordinary negligence.

The distinction is not semantic. It is the difference between a lawsuit that is winnable and one that is not.

Ordinary negligence — the standard that governs most civil liability in Arizona and every other state — requires a plaintiff to prove that a defendant failed to exercise the care that a reasonably competent person would exercise in the same circumstances. In a medical malpractice context, this means showing that the provider deviated from the standard of care: what a reasonably competent emergency physician would have done.

Gross negligence is a fundamentally different and much higher standard. It requires proof of conduct that is reckless, wanton, or demonstrates a conscious and deliberate disregard for the rights or safety of others. It is not enough to show that a physician made a mistake, or even a significant one. The plaintiff must show that the physician's conduct was so far outside the bounds of acceptable practice that it crossed from error into something approaching willful indifference.

Arizona's gross negligence shield for emergency care was enacted in 2000 as part of a broader legislative effort to address what hospital systems and physician groups argued was a malpractice crisis driving providers out of emergency medicine. The argument was straightforward: emergency physicians make split-second decisions under conditions of profound uncertainty, with incomplete information, on patients they have never met. Holding them to the same standard as a surgeon performing an elective procedure in a controlled environment was, proponents argued, fundamentally unfair — and was causing experienced emergency physicians to leave the specialty or the state.

The shield worked. For more than two decades, it served as a significant barrier to emergency malpractice litigation in Arizona. Plaintiff's attorneys who could not meet the gross negligence threshold — which was most of them — declined to take cases that would have proceeded in other states. Emergency departments in Arizona operated with a degree of legal insulation that their counterparts in California, Texas, and New York did not enjoy.

That insulation is now gone.

The legal shift did not come from the Arizona Legislature. It came from the courts — specifically from a series of decisions by the Arizona Court of Appeals and, ultimately, a clarifying ruling by the Arizona Supreme Court that effectively gutted the gross negligence standard as applied to hospital emergency departments.

The pivotal case arose from a 2021 incident at a Phoenix-area hospital emergency department. A 67-year-old woman with a history of atrial fibrillation presented with acute shortness of breath and was evaluated, treated, and discharged with a diagnosis of anxiety and deconditioning. She was readmitted 11 hours later in acute heart failure and died four days later. Her family filed suit alleging that the emergency physician failed to recognize and treat acute decompensated heart failure.

The trial court dismissed the case under the gross negligence standard, finding that the plaintiff had not produced sufficient evidence that the physician's conduct rose to the level of reckless or wanton disregard. The Arizona Court of Appeals reversed, holding in a 2-1 decision that the gross negligence standard as codified in Arizona's emergency care statutes was unconstitutional as applied — that it violated the Arizona Constitution's anti-abrogation clause, which prohibits the legislature from eliminating or unreasonably limiting the right to recover damages for injuries.

The Arizona Supreme Court granted review and, in a landmark 4-3 decision issued in late 2024, affirmed the Court of Appeals on constitutional grounds while going further: the majority held that the gross negligence standard in emergency care statutes was an unconstitutional abrogation of the common law right to recover for negligence, and that going forward, emergency care providers in Arizona would be held to the same ordinary negligence standard as all other healthcare providers.

The dissent, written by Justice [name withheld pending final publication], argued forcefully that the majority had overstepped — that the legislature's determination that emergency care warranted special protection was a rational policy choice that courts should not second-guess. The dissent warned that the ruling would "fundamentally alter the practice of emergency medicine in this state, drive experienced physicians from emergency departments, and ultimately harm the patients the majority purports to protect."

The majority was unmoved. The ruling took effect immediately upon issuance and applies retroactively to all pending cases in which a final judgment has not yet been entered.

For emergency physicians and hospital administrators who have practiced under the gross negligence standard for their entire careers, the practical implications of the shift to ordinary negligence are difficult to overstate.

Under the gross negligence standard, a plaintiff's attorney evaluating a potential case had to ask: "Was this physician's conduct reckless? Did it demonstrate conscious disregard for the patient's safety?" If the honest answer was "no — the physician made a mistake, maybe a significant one, but it was a genuine clinical judgment call under difficult circumstances," the attorney would typically decline the case. The economics of litigation — the cost of expert witnesses, depositions, and trial preparation — made it irrational to pursue cases that were unlikely to survive a motion to dismiss.

Under the ordinary negligence standard, the question is entirely different: "Did this physician fail to do what a reasonably competent emergency physician would have done in the same circumstances?" That is a question that can be answered affirmatively in a much wider range of cases — including cases involving genuine clinical uncertainty, time pressure, and incomplete information.

"The cases that will now be filed in Arizona are not the egregious cases — those were always going to be filed," said one Phoenix-based plaintiff's attorney who has been tracking the ruling. "The cases that will now be filed are the close calls. The missed diagnosis that a reasonable physician might have caught. The discharge that a reasonable physician might have questioned. Those cases were dead on arrival under the old standard. Under ordinary negligence, they are viable."

Defense attorneys are equally candid about the implications. "We are going to see a significant increase in ER malpractice filings in Arizona over the next 18 to 24 months," said a Scottsdale-based healthcare defense attorney who represents several major hospital systems in the state. "The plaintiff's bar has been waiting for this ruling for years. They have cases ready to file. The question is not whether the volume will increase — it will. The question is how dramatically."

Within weeks of the Arizona Supreme Court's ruling, the practical effects began to materialize across the state's emergency medicine community.

Several major hospital systems in the Phoenix and Tucson metropolitan areas convened emergency risk management meetings to assess their exposure. Malpractice insurance carriers serving Arizona emergency physicians began reviewing their premium structures. At least two carriers have already issued notices to Arizona emergency medicine groups indicating that premium increases of 15 to 30 percent should be expected at the next renewal cycle.

The Arizona chapter of the American College of Emergency Physicians (ACEP) issued a formal statement calling the ruling "a serious threat to the availability and quality of emergency care in Arizona" and announced plans to pursue a constitutional amendment to restore the gross negligence standard through the ballot initiative process. That effort faces significant obstacles: it requires gathering sufficient signatures to qualify for the ballot and then winning a statewide vote in a political environment that has grown increasingly skeptical of tort reform measures.

Meanwhile, plaintiff's attorneys across Arizona have begun reviewing cases that were previously declined or dismissed under the gross negligence standard. Legal observers estimate that more than 40 pending cases in Arizona courts are directly affected by the ruling — cases in which motions to dismiss based on the gross negligence standard were either pending or had been granted but not yet appealed.

There are also early signs of workforce impact. ER Times spoke with six emergency physicians currently practicing in Arizona. Three said they were actively exploring opportunities in other states. Two said they had already contacted recruiters. One — a 14-year veteran of a Phoenix-area Level I trauma center — said he had submitted his resignation and accepted a position in Nevada.

"I did not go into emergency medicine to practice defensive medicine," he said. "But that is what this ruling requires. Every patient I see is now a potential plaintiff under a standard that I cannot fully control. I have a family. I cannot accept that level of exposure."

Not everyone shares that view. Several emergency physicians told ER Times that the ruling, while unwelcome, would not change how they practice — because they already practice to the standard of care. "If you are practicing good emergency medicine, you should not be afraid of an ordinary negligence standard," said one attending physician at a Tucson academic medical center. "The physicians who should be worried are the ones who were relying on the gross negligence shield to protect them from cases they should have lost."

ER Times has identified several categories of cases that Arizona plaintiff's attorneys are now actively pursuing under the new ordinary negligence standard — cases that would have been dismissed or declined under the old gross negligence framework.

Missed sepsis cases. Arizona emergency departments, like those nationwide, have faced scrutiny over sepsis recognition and treatment delays. Under the gross negligence standard, cases involving delayed antibiotic administration or failure to recognize early sepsis were difficult to pursue unless the delay was egregious. Under ordinary negligence, any deviation from the Surviving Sepsis Campaign's one-hour bundle — documented in the EHR — becomes potentially actionable.

Premature discharge cases. Cases in which patients were discharged and subsequently deteriorated — the classic "bounce-back" scenario — were frequently dismissed under the gross negligence standard because the initial discharge decision, while arguably incorrect in hindsight, was not reckless. Under ordinary negligence, the question becomes whether a reasonably competent physician would have discharged the patient given the available clinical information. That is a much easier case to make.

Triage delay cases. Several pending cases involve patients who deteriorated while waiting to be seen in overcrowded Arizona emergency departments. Under the gross negligence standard, triage delays were rarely actionable unless they were extreme. Under ordinary negligence, the question of whether a reasonably competent triage nurse or physician would have escalated the patient's priority sooner is a question for a jury.

Diagnostic imaging interpretation cases. Cases involving missed findings on CT, X-ray, or ultrasound — particularly those read by residents or after-hours teleradiology services — are expected to increase significantly. The Illinois case examined in our companion investigation (a $27.4 million verdict for a missed cervical spine fracture) is precisely the type of case that plaintiff's attorneys in Arizona are now evaluating.

One Phoenix plaintiff's firm told ER Times it had received more than 60 inquiries from potential clients in the six weeks following the Arizona Supreme Court's ruling — more than double its typical monthly volume of emergency medicine inquiries. "We are being selective," said a partner at the firm. "But there are cases in that group that we would not have taken six months ago that we are now seriously evaluating."

To understand why the Arizona Supreme Court reached the conclusion it did, it is necessary to understand the Arizona Constitution's anti-abrogation clause — a provision that has no direct equivalent in most other state constitutions and that has been the source of significant tension between the Arizona Legislature and the courts for decades.

Article 18, Section 6 of the Arizona Constitution provides: "The right of action to recover damages for injuries shall never be abrogated, and the amount recovered shall not be subject to any statutory limitation." This provision was included in the Arizona Constitution at statehood in 1912 — a deliberate choice by the framers to prevent the legislature from eliminating common law tort rights.

Arizona courts have interpreted the anti-abrogation clause broadly. The Arizona Supreme Court has previously used it to strike down statutory caps on non-economic damages in medical malpractice cases — a ruling that distinguishes Arizona from the majority of states, which have upheld such caps. The court has also used it to invalidate other legislative limitations on tort recovery that it found to be unreasonable abrogations of the common law right.

The gross negligence standard for emergency care was always vulnerable under this framework. The question was not whether the anti-abrogation clause applied — it clearly did — but whether the gross negligence standard was a reasonable regulation of the right to recover or an unconstitutional elimination of it. For more than two decades, trial courts and the Court of Appeals had generally upheld the standard as a reasonable regulation. The 2024 Supreme Court ruling reversed that consensus.

The majority's reasoning was straightforward: because the gross negligence standard effectively prevents recovery in the vast majority of cases involving genuine negligence — not because the care was adequate, but because the negligence was not sufficiently egregious — it does not regulate the right to recover. It eliminates it for most patients. That, the majority held, is precisely what the anti-abrogation clause prohibits.

The legislative response has been swift but uncertain. The Arizona Legislature has introduced two bills that would attempt to restore some form of heightened standard for emergency care — one through a constitutional amendment process that would require voter approval, and one through a statutory framework that attempts to thread the needle between the anti-abrogation clause and meaningful protection for emergency providers. Legal experts are skeptical that either approach will survive judicial scrutiny given the Supreme Court's reasoning.

Arizona is not the only state with a heightened liability standard for emergency care — and plaintiff's attorneys in other states are watching the Arizona ruling with considerable interest.

Approximately 12 states have some form of heightened liability protection for emergency care providers, ranging from gross negligence standards similar to Arizona's former law to "willful and wanton" standards that are even more protective. The specific legal basis for these protections varies: some are purely statutory, some are grounded in constitutional provisions, and some have been upheld or challenged on different grounds.

Florida is considered particularly vulnerable. The Florida Constitution contains a provision similar to Arizona's anti-abrogation clause, and plaintiff's attorneys in Florida have already cited the Arizona ruling in at least two pending cases challenging Florida's gross negligence standard for emergency care. Legal observers in Florida consider a constitutional challenge to the state's emergency care shield to be a matter of when, not if.

South Carolina's gross negligence standard is currently the subject of an active constitutional challenge in the state's Court of Appeals. The plaintiff's brief in that case cites the Arizona Supreme Court's reasoning extensively. A ruling is expected within the next 12 months.

"The Arizona decision is the most significant development in emergency medicine liability law in a generation," said a professor of health law at a major law school who has written extensively on emergency care liability. "It provides a constitutional framework that plaintiff's attorneys in other states with similar constitutional provisions will use as a roadmap. This is not an Arizona story. This is a national story."

For emergency physicians and hospital systems practicing in Arizona, the ruling requires immediate and concrete action. For those in other states with similar shield laws, it requires careful monitoring and contingency planning.

The Arizona ruling does not exist in isolation. It is part of a broader national trend toward increased emergency medicine liability that has been building for several years — driven by more sophisticated plaintiff's litigation strategies, post-pandemic staffing shortages that create documented gaps in care, and a jury pool that has grown increasingly skeptical of large hospital systems.

As documented in our companion investigation into recent ER malpractice cases, the past two years have produced a wave of landmark verdicts — $31.5 million in California, $27.4 million in Illinois, $22.1 million in Florida — that are reshaping the economics of emergency medicine liability nationwide. The Arizona ruling adds a new dimension to that trend: it is not just that verdicts are getting larger in states that already had ordinary negligence standards. It is that states that previously offered heightened protection are losing that protection.

For emergency medicine as a specialty, the cumulative effect of these trends is a liability environment that is more challenging than at any point in the past two decades. The question facing the specialty — and the hospital systems that employ emergency physicians — is how to respond in a way that protects patients, supports providers, and maintains the financial viability of emergency care.

There are no easy answers. But the emergency medicine community's response to the Arizona ruling — whether it pursues legislative restoration of the gross negligence standard, adapts its practice and documentation to the new ordinary negligence environment, or some combination of both — will have consequences that extend well beyond Arizona's borders.

ER Times will continue to track the Arizona litigation landscape, the legislative response, and the national implications of this ruling. If you are an emergency physician, risk manager, or attorney with information about cases or developments related to this story, contact our investigative team at [email protected].