Under Arizona medical malpractice law, you have two years to sue a licensed healthcare provider whose negligence, error, misconduct, or breach of contract caused you injury, and before your case gets far you must back it with a sworn opinion from a qualified medical expert. Arizona is unusual in one important respect: its constitution prohibits any cap on the damages you can recover. But the procedural hurdles are strict, and patients who miss them lose their claims before a jury ever sees the facts.
What Counts as Malpractice in Arizona
A.R.S. 12-561 defines a medical malpractice action as a claim for injury or death against a licensed healthcare provider based on negligence, misconduct, errors, or breach of contract in delivering healthcare, medical, nursing, or other health-related services.1Arizona Legislature. Arizona Revised Statutes Title 12 – Section 12-561 The statute also covers care delivered without the patient’s express or implied consent, so informed consent failures fall within it.
“Licensed health care provider” reaches further than most people expect. It includes any person, corporation, or institution licensed or certified by Arizona to provide health care, along with their officers, employees, and agents working under supervision.1Arizona Legislature. Arizona Revised Statutes Title 12 – Section 12-561 A hospital-employed surgeon, a clinic physician, a nurse, and even a blood bank processing facility can all be defendants.
The Four Elements You Have to Prove
Every Arizona malpractice claim rests on four elements. Falling short on any one of them sinks the whole case.
- Duty of care. A provider-patient relationship existed. Once a doctor agreed to treat you, they owed you care that meets the standard expected of a reasonably competent provider in the same specialty under similar circumstances.
- Breach. The provider fell below that standard. This is where most cases are won or lost, and it almost always requires testimony from a qualified medical expert explaining what a competent provider would have done differently.
- Causation. The breach directly caused your injury or made an existing condition worse. A provider can make a mistake that technically falls below the standard, but if it didn’t actually harm you, there is no claim.
- Damages. You suffered real, measurable harm. Medical bills, lost income, pain and suffering, and reduced quality of life all count, but they must be connected to the provider’s error rather than the underlying condition that brought you in.
Causation is where defendants fight hardest. If you were already seriously ill, the defense will argue your outcome would have been the same regardless of any error. Your expert has to draw a clear line between what the provider did wrong and the specific harm that followed.
The Two-Year Deadline and How the Clock Runs
You generally have two years to file.2Arizona Legislature. Arizona Code 12-542 – Injury to Person, Injury When Death Ensues The clock typically starts on the date of the injury, but Arizona courts recognize a discovery rule: if the injury was not immediately apparent, the two-year period begins when you knew or reasonably should have known that you were harmed and that a medical error likely caused it. That matters in misdiagnosis cases, retained surgical instruments, and conditions that develop slowly after treatment.
Minors get more time. The statute is tolled until the child turns 18, so a child injured at age 10 has until their 20th birthday to file. Missing the deadline by a single day almost certainly means dismissal, and courts enforce the rule strictly.
The Preliminary Expert Affidavit
Arizona imposes an early procedural hurdle that catches many patients off guard. You must file a certification stating whether expert testimony is needed to prove the standard of care or liability. If it is, and in malpractice cases it almost always is, you must serve a preliminary expert opinion affidavit alongside your initial disclosures under Rule 26.1 of the Arizona Rules of Civil Procedure.3Arizona Legislature. Arizona Code 12-2602 – Preliminary Expert Opinion Testimony, Certification
The affidavit must cover four points: the expert’s qualifications to opine on this type of care, the factual basis for each claim, the specific standard-of-care violations, and how those violations caused or contributed to your injuries.3Arizona Legislature. Arizona Code 12-2602 – Preliminary Expert Opinion Testimony, Certification
If you certify that an affidavit is needed and then fail to serve one, the court will dismiss the claim. Dismissal is without prejudice, so you can refile, but only if you are still within the statute of limitations.3Arizona Legislature. Arizona Code 12-2602 – Preliminary Expert Opinion Testimony, Certification By that point, many claimants have burned through most of their two years.
Who Qualifies as an Expert
Arizona is demanding about qualifications, especially when the defendant is a specialist. The expert must be licensed in the relevant health profession, and if the defendant practices a specialty, the expert must practice in the same specialty. The expert also must have spent the majority of their professional time in the year before the alleged injury either actively practicing in that specialty or teaching in the field. A retired cardiologist who has not practiced in years would likely not qualify against a working cardiologist.
What the Expert Costs
The affidavit requirement is a real financial commitment. Medical experts typically charge several hundred dollars per hour for case review, and those who travel for depositions or trial testimony often charge thousands per day. Retainers of several thousand dollars upfront are standard. This is one reason most malpractice attorneys work on contingency and screen cases aggressively; when an attorney declines a case, expert cost is often the reason.
No Caps on What You Can Recover
Unlike many states that limit malpractice recoveries, Arizona’s constitution prohibits any law capping damages for injury or death.4Justia. Arizona Constitution Article 2 Section 31 – Damages for Death or Personal Injuries Because it’s a constitutional protection, the legislature cannot override it without amending the constitution. Your recovery is determined by the evidence, not by a ceiling.
Recoverable damages fall into three categories:
- Economic damages cover measurable financial losses: past and future medical bills, lost wages, reduced earning capacity, and the cost of ongoing care such as physical therapy or home health aides.
- Non-economic damages cover pain, suffering, emotional distress, loss of enjoyment of life, and loss of consortium (the effect on a spouse’s relationship).
- Punitive damages are awarded only when the provider’s conduct was willful or egregiously reckless. They punish rather than compensate, and Arizona juries do not award them lightly.
Arizona also follows comparative fault. If a jury finds you partly responsible for your injury, your award drops by your share of fault. A $500,000 verdict with a 20% fault finding against you pays out $400,000.
Claims Against Government Healthcare Providers
If your injury happened at a government-run facility, the rules change. Claims against Arizona state or local government employees require a notice of claim filed with the appropriate government entity within 180 days of the incident, far shorter than the two-year civil deadline.
Claims against federal providers, including VA hospitals and Indian Health Service facilities that serve many Arizona residents, fall under the Federal Tort Claims Act. The FTCA requires you to file an administrative claim with the responsible federal agency within two years of the injury, using Standard Form 95 or equivalent written notice that includes a specific dollar amount for your damages.5Immigration and Customs Enforcement. Claims Under the Federal Tort Claims Act You cannot file a lawsuit until the agency denies your claim or fails to respond within six months. Missing the administrative step is a jurisdictional bar; no court can waive it.
Medicare’s Claim on Your Settlement
If you’re a Medicare beneficiary, a settlement doesn’t mean you keep every dollar. Federal law requires you or your attorney to notify Medicare when you file a malpractice claim against someone with liability insurance.6Centers for Medicare & Medicaid Services. Reporting a Case Medicare can recover the cost of any care it paid for that your settlement also compensates. This is the Medicare Secondary Payer rule, and ignoring it can result in Medicare pursuing you directly after the case resolves. A competent attorney will handle the reporting, but the lien can meaningfully reduce your net recovery.
What Bringing a Case Actually Costs
Most Arizona malpractice attorneys work on contingency, taking a percentage of the recovery instead of billing hourly. If you lose, you typically owe no attorney fee. But “no fee if no recovery” is not the same as “no cost.” Filing fees, expert retainers, medical record retrieval, and deposition transcripts add up quickly. Total out-of-pocket litigation costs for a case that goes to trial can run into the tens of thousands of dollars, and in many contingency agreements the client remains responsible for these expenses even if the case is lost. Read the fee agreement before you sign it.