Arizona Medical Malpractice Lawyer

What Counts as Medical Malpractice in Arizona

Arizona law treats medical malpractice as a claim for injury or death against a licensed health care provider, based on negligent care, an error or omission in health-related services, or treatment given without consent. A.R.S. 12-561 defines the action, and it reaches licensed hospitals and other institutions as well as individual doctors, nurses, and other providers.

Medical malpractice is negligence by a licensed health care provider in a patient’s care, a narrower category than negligence in general. Not every injury in a hospital or clinic is malpractice. Medicine carries risk, and a bad outcome is not always negligence. Care like the following can give an Arizona patient a claim:

• A nurse gives a drug the patient’s chart lists as an allergy.
• An abnormal lab result is never followed up or passed on to the patient.
• A surgeon operates on the wrong side of the body.
• Falling oxygen levels after sedation go unnoticed.
• A patient with classic heart attack signs is sent home with a diagnosis of indigestion.

What You Must Prove in an Arizona Medical Malpractice Claim

Under A.R.S. 12-563, an Arizona medical malpractice claim must prove that the provider fell below the care expected of a reasonable, prudent provider in the same profession under similar circumstances, and that this failure was a proximate cause of the injury. The Arizona Supreme Court described the elements as duty, breach, causation, and damages in Roebuck v. Mayo Clinic.

Proximate cause means the failure caused the harm directly enough that the law holds the provider responsible. Causation can be disputed when the defense argues that the illness, and not the care, caused the injury.

When expert testimony is needed, a medical expert explains what the standard of care required, where the care fell short, and how that shortfall caused the harm. A.R.S. 12-2604 sets who may testify about the standard of care, and for specialist care the expert’s specialty must match, along with board certification when the defendant is board certified.

Having a health problem before the care does not by itself bar an Arizona claim. The patient still has to prove that negligent care caused additional harm or worsened the condition, and the provider is not responsible for harm the condition would have caused anyway.

Arizona Medical Malpractice Laws and Deadlines

Title 12 of the Arizona Revised Statutes and the Arizona Constitution govern medical malpractice claims in Arizona, setting the filing deadline, the expert requirements, the rules on shared fault, and the protection against damage caps. Title 12 also sets the wrongful death and public-entity rules, and Arizona court decisions add the rules on hospital responsibility and consent forms.

Each rule below was checked and verified against the Arizona statutes, the Arizona Constitution, and court decisions, and is accurate as of October 6, 2026.

The Two-Year Filing Deadline and When It Starts

Arizona law generally gives two years after a claim accrues to file a medical malpractice lawsuit, under A.R.S. 12-542 (current as of October 2026). The clock generally starts once the patient knew, or should reasonably have known, enough to look into whether the injury came from negligence, so it is not always the day of the procedure. The Arizona Supreme Court set out that test in Walk v. Ring.

For a child’s own claim, A.R.S. 12-502 generally pauses the clock until age 18, leaving until age 20 to sue. The same statute excludes time when the patient was legally of unsound mind when the claim accrued, meaning unable to manage their affairs or understand their legal rights. That test is narrow, and in Kopacz v. Banner Health the Court of Appeals held that a serious illness alone does not meet it.

No Cap on Damages in Arizona

The Arizona Constitution, in Article 2, Section 31, bars laws limiting damages for death or personal injury, so Arizona has no dollar cap on compensatory damages (money for the patient’s losses) in an ordinary medical malpractice case (current as of October 2026).

Article 18, Section 6 protects the right to recover damages for injuries, except that it does not let a person harmed while committing, attempting or fleeing a felony sue the person targeted by that felony. Under current Arizona law, a living patient can be compensated for injury-related pain, suffering, and emotional distress, along with proven financial losses, from medical bills to lost wages. Every loss still has to be proved, so the absence of a cap is not a promise that every amount claimed will be paid.

The Preliminary Expert Opinion Affidavit

When an Arizona malpractice claim needs expert testimony, A.R.S. 12-2603 requires the patient to serve a preliminary expert opinion affidavit with the initial disclosures under Arizona Rule of Civil Procedure 26.1 (current as of October 2026). In it, the expert swears to their qualifications, the factual basis for the opinion, how the care violated the standard, and how the conduct caused or contributed to the harm.

Initial disclosures are an early exchange of evidence and information between the two sides. Before that, the patient’s side must file and serve a written certification with the claim, stating whether expert testimony is needed to prove the standard of care or liability.

If a required affidavit is not provided after that certification or a court order, the claim against that provider can be dismissed without prejudice, meaning the court has not ruled on whether the care was negligent. An insufficient affidavit must be given a reasonable chance to be corrected when needed. Arizona’s medical malpractice statutes set no general waiting period or advance notice before suing a private provider.

When the Patient Shares Fault

Currently, Arizona reduces a patient’s damages by the patient’s own percentage of fault instead of barring the claim, under the pure comparative fault rule in A.R.S. 12-2505. The rule covers ordinary fault, and it does not protect a patient whose deliberate or reckless conduct caused or contributed to the harm.

Each defendant generally pays only the share of damages that matches its own fault, under A.R.S. 12-2506. Exceptions include responsibility for an employee’s or agent’s fault and parties who consciously agreed to commit an intentional wrong and took part in it.

Who Can Be Held Responsible

An Arizona hospital can be held responsible for negligence by its employees acting within the scope of their employment and for its own negligence as an institution, as the Arizona Supreme Court explained in Kopp v. Physician Group of Arizona. Doctors, nurses, and other providers also answer for their own negligent care.

A hospital is not automatically responsible for every doctor with privileges there. It can answer for an independent physician when the hospital’s own conduct led the patient to believe the physician was its employee or agent and the patient justifiably relied on that belief, the test the Court of Appeals applied in Fadely v. Encompass Health Valley of the Sun Rehabilitation Hospital.

Signed Consent Forms

A signed consent form does not decide whether treatment was negligent under current Arizona law, which judges an informed consent claim by what a reasonably prudent provider should have disclosed, as the Arizona Supreme Court applied in Francisco v. Affiliated Urologists. An informed consent claim is a claim that the risks of treatment were not properly explained.

The patient must also show the missing disclosure caused harm, including that a proper explanation would have changed the decision to go ahead.

Treatment given without consent, or beyond what the patient agreed to, is different. It can support a separate battery claim, a claim for unconsented treatment, as the Arizona Supreme Court explained in Duncan v. Scottsdale Medical Imaging.

When Medical Malpractice Causes a Death

Arizona currently allows a surviving spouse, child, parent, guardian, or personal representative (the person appointed to handle the estate) to bring a wrongful death action when medical negligence causes a death, under A.R.S. 12-611 and A.R.S. 12-612. The action is brought for the surviving spouse, children, or parents, or for the estate if none survive, and it requires negligence the patient could have sued over had they lived.

In Wilmot v. Wilmot, the Arizona Supreme Court held that one wrongful death action covers all of those family members, with the recovery divided in proportion to each one’s damages. Surviving family members can be compensated for their own losses and emotional suffering, and Arizona’s constitutional bar on damage caps applies to death claims as well.

The deadline is generally two years, ordinarily counted from the death. The patient’s own injury claim also survives under A.R.S. 14-3110 for the personal representative to pursue, but without damages for the patient’s own pain and suffering.

Claims Against Public Health Care Providers

A malpractice lawsuit against an Arizona public entity or public employee generally must be filed within one year after the claim accrues, under A.R.S. 12-821, half the two-year deadline that applies to most malpractice claims (current as of October 2026). A written notice of claim is generally due within 180 days after accrual, under A.R.S. 12-821.01.

The notice must reach the person authorized to accept it, explain the basis for liability, and state a specific settlement amount with the facts that support it. A provider is not public just because it receives government funding, and a timely notice does not stretch the one-year deadline to two years.

The Cases Our Arizona Medical Negligence Law Firm Handles

Throughout Arizona, Hastings Law Firm handles claims for surgical errors, misdiagnosis, birth injuries, anesthesia errors, medication errors, and hospital negligence, along with dangerous drug and defective medical device cases. Our lawyers also represent families in nursing home abuse and neglect claims, starting each case with the records of the care involved.

Arizona families come to us most with these claims:

• Misdiagnosis and failure to diagnose. A test result can go unread or a serious illness can be taken for a minor one, narrowing the treatment options. The failure to diagnose attorneys and misdiagnosis lawyers at our firm line up each visit, symptom, and test to pinpoint when the right diagnosis should have been made and how long the delay lasted. Request the records from every visit before the diagnosis.
• Surgical errors. Damage to a nearby nerve, vessel, or organ, or a complication no one watches for, can mean another operation. In surgical error cases, we compare the post-surgery nursing notes with the operative report to find the first warning sign, since the response to it shows whether the complication was handled properly. Note what the surgical team told you before and after.
• Birth injuries. Signs of distress during labor call for a timely response, and a late one can leave a child with an injury that shapes the years ahead. The fetal monitoring strips and delivery notes are where our birth injury attorneys start, because the gap between a warning and the response shows whether the care fell short. A file of your child’s diagnoses, therapy plans, and appointments, started early, helps the review.
• Medication errors. A wrong drug, a wrong dose, or a missed interaction can prolong an illness or cause lasting harm. Our medication error attorneys follow each drug from prescription to bedside, since every handoff was a chance to catch the error, and our dangerous drug injury lawyers handle harm caused by the drug itself. Hold on to the pill bottles, labels, and pharmacy printouts.
• Doctor malpractice. A physician can dismiss a returning symptom or skip a needed test, giving a treatable problem time to grow. In doctor malpractice claims, our lawyers compare what the patient reported at each appointment with what the physician ordered, showing whether a warning was heard and set aside. List every appointment and what was said at each one.
• Hospital negligence. Thin staffing or a missed handoff between shifts can let a patient’s condition slip, leading to a fall, an infection, or a pressure wound. Our hospital negligence lawyers read the staffing schedules and nursing notes to establish who knew the patient was in danger and when. Photograph any pressure wound or other visible injury and note the dates.
• Defective medical devices. A device or implant can break down inside the body or stop working as designed, and removing it can take another surgery. Our defective medical device lawyers examine the device records and what the manufacturer knew about earlier failures, since that history can show the problem was known. Keep any recall letter you receive, and store the implant card safely.

These are the most common medical malpractice claims we see across Arizona, but they do not represent every case type we accept. If what happened to you or someone you love is not listed, contact us and our team will look at it with you.

What is an Arizona Medical Malpractice Case Worth?

The value of an Arizona medical malpractice case depends on the injury, the losses it caused, and the evidence that proves them. No case has a set value, and there are no odds, because each one is unique and settlements vary widely.

A claim can account for medical bills, past and future, and income the patient lost or will lose. It can also reflect pain, emotional distress, and the parts of daily life the injury has taken away, and an injury that requires years of care can weigh heavily in its value. Emotional distress has to be tied to the injury and shown through evidence, such as treatment records and the accounts of the patient and the people close to them. Arizona does not cap damages in these cases.

Whether a claim is worth pursuing depends on the strength of the evidence and the size of the losses, because proving negligence often depends on medical experts whose cost can exceed what a modest claim would recover. Before accepting a case, our team reviews the evidence and what it will cost to build.

How a Medical Malpractice Case Moves Forward in Arizona

An Arizona medical malpractice case commonly begins with obtaining the medical records and a legal and medical review of the care. The lawsuit is then filed with the certification on expert testimony that A.R.S. 12-2603 requires. When expert testimony is needed, the preliminary expert opinion affidavit follows with the initial disclosures, and discovery develops the evidence before any settlement or trial.

In the weeks and months after an injury, an Arizona claim tends to move in this order:

1. Get the care you need. Treatment comes first, and its records show what the injury did.

2. Keep bills and paperwork. Save discharge instructions, receipts, insurance statements, and letters from providers.

3. Write down dates and names. Record who treated you, when, and what you were told while your memory is fresh.

4. Request the medical records. Each provider should get a written request for the complete chart.

5. Get a lawyer’s review. A lawyer who handles medical malpractice reads the chart to learn what happened.

6. Consult a medical expert. A specialist can say what the accepted standard of care required in that field.

7. File the lawsuit with the certification. Suit is filed within the deadline, with the written statement on whether expert testimony is needed.

8. Serve the preliminary expert opinion affidavit. When an expert is needed, the affidavit goes out with the initial disclosures.

9. Discovery. Each side gathers evidence from the other, including documents and depositions, where witnesses answer questions under oath before trial.

10. Settlement conference or mediation. A court may refer the parties to a settlement conference, and private mediation is another way to try to reach an agreement, as the Maricopa County Superior Court describes.

11. Trial. If the case is not otherwise resolved, the evidence goes to a jury or a judge, who decides whether the care met the standard, the last stage shown on the Maricopa County civil case flow chart.

An Arizona medical malpractice case has no set length. The number of providers involved, how disputed the medical questions are, and whether the case settles all affect how long it takes. Nationally, most malpractice claims end without a trial, and no individual case comes with a guaranteed result.

Separately from a lawsuit, a patient can file a complaint about a physician with the Arizona Medical Board, which investigates the complaint and decides it.