Arizona Medical Malpractice Laws

Arizona medical malpractice laws give most injured patients two years to file a lawsuit under A.R.S. § 12-542. That clock generally starts when the patient knew, or reasonably should have known, about the injury and its cause. Claims for children are usually paused until age 18, and claims against public hospitals carry much shorter notice deadlines. Arizona's constitution bars caps on damages.

This guide answers the questions families ask most often. How long do you have? What must be filed with a complaint? Is there a cap on what a jury can award? How do these rules apply when a baby is hurt during labor and delivery? Each answer below names the Arizona statute or constitutional provision that controls it, along with the exceptions that can change the result.

Gilman & Bedigian co-founder Briggs Bedigian has tried more than 70 cases to verdict. Those verdicts include the $182 million birth injury verdict against the University of Pennsylvania (Hagans v. Hospital of the University of Pennsylvania), the largest medical malpractice verdict in Pennsylvania history. If your child was injured at birth in Arizona, our firm handles birth injury cases nationwide and works with local counsel when required by the rules of a particular jurisdiction. No fee unless we win. Call (800) 529-6162 for a free consultation.

Key Takeaways

• Arizona has no cap on medical malpractice damages. Article 2, Section 31 of the Arizona Constitution prohibits laws limiting damages for injury or death.
• Arizona uses pure comparative fault under A.R.S. § 12-2505. A patient's own share of fault reduces the award but generally does not bar recovery.
• A plaintiff must certify whether expert testimony is needed when filing. If it is, the plaintiff must serve a preliminary expert opinion affidavit under A.R.S. § 12-2603.
• Claims against Arizona public entities and public employees generally require a notice of claim within 180 days (A.R.S. § 12-821.01) and a lawsuit within one year (A.R.S. § 12-821).
• A.R.S. § 12-502 generally pauses the limitations period for a minor until the child turns 18. A parent's own claims may follow a different clock.

What Are the Main Arizona Medical Malpractice Laws?

Arizona defines malpractice through a specific standard written into statute. Under A.R.S. § 12-563, a patient must prove that the provider failed to exercise the degree of care, skill and learning expected of a reasonable, prudent health care provider in the same profession or class in Arizona under similar circumstances, and that this failure was a proximate cause of the injury. Every Arizona claim, from a missed diagnosis to a delivery-room error, is built on those two elements.

The standard of care is the level of care a reasonably careful provider in the same field would have given in the same situation. It is not perfection. A bad outcome alone does not prove malpractice. The question is whether the care fell below that standard and whether the shortfall, rather than the underlying illness, caused the harm.

Who can be held responsible?

Arizona claims can involve physicians, nurses, midwives, physician assistants, hospitals and practice groups. A hospital may be responsible for its employees' negligence. It may also be responsible for its own failures in staffing, credentialing or policies. Common claim types include failure to diagnose cancer, stroke or sepsis, surgical and medication errors, and birth injuries.

Why the stakes are high

Medical errors are a serious public health problem. A Johns Hopkins University analysis (2016) estimated that medical errors are the third leading cause of death in the United States, responsible for an estimated 250,000 deaths each year. Patient-safety research and resources are also available from the AHRQ.

The emergency care exception

One Arizona rule changes the burden of proof in certain emergency settings. A.R.S. § 12-572 requires clear and convincing evidence, which is a higher standard than the usual "more likely than not," for certain care provided under the federal emergency treatment law (EMTALA) in a hospital emergency department. It also covers services provided as a result of a disaster. Whether a specific episode of care qualifies is a fact-heavy question.

How Long Do You Have to File Under Arizona's Statute of Limitations?

Arizona's medical malpractice statute of limitations is two years under A.R.S. § 12-542, measured from when the cause of action accrues. Arizona courts apply a discovery rule. The clock generally starts when the patient knew, or reasonably should have known, both that they were injured and that a provider's conduct may have caused it. It does not necessarily start on the date of treatment.

That sounds generous, but discovery-rule disputes are common. A defendant may argue that a symptom, a second opinion or a frank conversation with a doctor put the patient on notice earlier than the patient believes. Our article on how statute of limitations complications can doom a medical malpractice case explains why these fights matter.

Tolling means the limitations clock is paused, so time during that period does not count against the deadline. Under A.R.S. § 12-502, the period generally does not run while the injured person is under 18 or of unsound mind. It begins once that condition ends.

Does Arizona have a statute of repose for malpractice?

A statute of repose is an outer time limit that can bar a claim even if the patient never discovered the injury. Arizona's malpractice statutes do not impose a separate repose period on these claims. In the 1980s, the Arizona Supreme Court struck down earlier malpractice-specific time limits, including in Kenyon v. Hammer and Barrio v. San Manuel Division Hospital. Its reasoning relied in part on the Arizona Constitution's protections for the right to sue for injuries. The practical result is that Arizona's two-year limitations period, with the discovery rule and tolling, is the main deadline for claims against private providers.

How Do Arizona Deadlines Apply to Birth Injury Claims?

For a child injured at birth, A.R.S. § 12-502 generally pauses the child's own limitations period until the child turns 18, with the two-year period under § 12-542 running after that. This matters because conditions like cerebral palsy, hypoxic-ischemic encephalopathy and brachial plexus injuries often become clearer only as a child misses developmental milestones.

But there's a catch.

A birth injury usually creates more than one claim. The child has a claim for their own injuries, including lifetime care needs and lost earning capacity. Parents often have their own claims, such as for medical expenses they paid while the child was a minor. The parents' claims may not get the same tolling. Waiting until a child is older can mean losing the parents' own claims.

Practical reasons not to wait

Tolling protects the legal right, not the evidence. Fetal heart monitoring strips, nursing notes and staff memories are easier to gather and interpret close to the delivery. Witnesses change jobs and move away. If the hospital is a public entity, the 180-day notice rule discussed below may apply instead of the longer private-provider rules. How minority tolling interacts with public-entity deadlines is a technical question. A family facing it should get advice early.

What Must You File With an Arizona Malpractice Complaint?

Under A.R.S. § 12-2603, a plaintiff must certify in writing, when filing the complaint, whether expert opinion testimony is needed to prove the claim. If it is, the plaintiff must serve a preliminary expert opinion affidavit with the initial disclosures. Arizona places its early merit requirement inside the lawsuit itself, rather than relying on a pre-filing review panel for private providers.

A preliminary expert opinion affidavit is a sworn statement from a qualified expert. It must set out the expert's qualifications, the factual basis for each claim, the acts or omissions the expert says violated the standard of care, and how those failures caused or contributed to the injury. If the requirement is not met and the problem is not cured, the court must dismiss the claim without prejudice. "Without prejudice" can still end a case in practice if the limitations period has run by then.

Who qualifies as an expert in Arizona?

A.R.S. § 12-2604 sets strict qualifications for standard-of-care experts. The expert must be a licensed health professional. If the defendant is a specialist, the expert generally must practice in the same specialty. If the defendant is board certified, the expert must be board certified in that specialty. During the year before the incident, the expert must have devoted most of their professional time to active clinical practice or teaching in that same profession or specialty.

Key insight: In Arizona, finding the right expert is a legal requirement, not just a strategy choice. A delivery handled by an obstetrician, a labor nurse and an anesthesiologist may require separate, matching experts for each provider whose care is questioned.

Does Arizona Have a Medical Malpractice Damages Cap?

No. Article 2, Section 31 of the Arizona Constitution provides that no law shall be enacted limiting the amount of damages recoverable for causing the death or injury of any person. Arizona is among the states where the legislature cannot impose the kind of non-economic damages cap found elsewhere. Our overview of caps on medical malpractice damages by state shows how unusual that is.

Because a statutory cap is not available, cap advocates have looked elsewhere. Our coverage of how an Arizona governor called for Congress to implement national limits describes one such effort. No cap does not mean any amount is automatic. A jury still decides what the evidence supports, and judges can review awards.

Collateral sources and apologies

Two other Arizona statutes affect damages and evidence. A.R.S. § 12-565 allows a malpractice defendant to introduce evidence of payments from collateral sources, meaning outside payers such as health insurance. The plaintiff may then show what they paid to obtain those benefits. A.R.S. § 12-2605 generally keeps a provider's statements of sympathy or apology out of evidence as admissions of liability. See our guide to the types of damages in a medical malpractice lawsuit for more on each category.

How Does Arizona's Comparative Fault Rule Affect Your Recovery?

Arizona follows pure comparative fault under A.R.S. § 12-2505: a patient's own fault reduces the damages by their percentage of fault but generally does not bar recovery entirely. A patient found 30% at fault for skipping follow-up care would recover 70% of the damages awarded.

In malpractice cases, defendants sometimes argue that a patient ignored instructions, withheld history or delayed returning to the hospital. In birth injury cases, a newborn cannot be at fault. Defendants may still point to other causes, such as a genetic condition or an infection.

Several liability and nonparties

A.R.S. § 12-2506 generally makes each defendant responsible only for its own percentage of fault. This is called several liability: one defendant usually does not pay another's share, though exceptions exist, including for an employer's responsibility for its employee. Defendants may also name a "nonparty at fault." Identifying every responsible provider early helps keep blame from shifting onto someone who is not in the case.

What Changes When the Provider Is a Government Hospital or Federal Clinic?

For Arizona public entities and public employees, A.R.S. § 12-821.01 generally requires a written notice of claim within 180 days after the cause of action accrues, and A.R.S. § 12-821 requires the lawsuit within one year. The notice must include facts supporting liability and a specific amount for which the claim can be settled. A notice missing those elements can be fatal.

A notice of claim is a formal written demand served on the government before suing, which gives it a chance to investigate and settle. Arizona public providers can include county and special health care districts. One example is Valleywise Health, operated by the Maricopa County Special Health Care District. Whether a particular hospital or physician is "public" is not always obvious.

Federal providers follow a different path

Claims against federal facilities, such as VA medical centers or Indian Health Service facilities, generally fall under the Federal Tort Claims Act. Some federally funded community health centers also qualify when their staff are deemed federal employees under 42 U.S.C. § 233. These claims require a written administrative claim to the agency within two years (28 U.S.C. § 2401(b)) before any lawsuit can be filed (28 U.S.C. § 2675(a)). Arizona's discovery rule and child-tolling rules may not apply the same way.

How Do Wrongful Death Claims Work After Medical Negligence in Arizona?

Under A.R.S. §§ 12-611 and 12-612, a wrongful death action may be brought by a surviving spouse, child, parent or guardian, or the estate's personal representative, for the benefit of the spouse, children or parents, or the estate if none survive. Only one action is brought for all beneficiaries. The two-year deadline in § 12-542 applies to private defendants.

Losing someone to a preventable medical error is devastating. The legal process cannot undo it. It can, however, require a full accounting of what happened. Arizona juries may award damages they find fair and just under § 12-613. Those damages commonly include loss of love, companionship and guidance, emotional anguish, and lost financial support.

Survival claims are separate

A survival claim carries forward the deceased person's own claim, such as medical bills incurred before death. Arizona's survival statute, A.R.S. § 14-3110, does not allow recovery for the deceased person's pain and suffering. That is one reason families often pursue both claims together. Whether a claim exists after a stillbirth or pregnancy loss depends on specific facts and current Arizona law.

How Does an Arizona Medical Malpractice Case Move From Records to Resolution?

An Arizona malpractice case typically moves from records collection to expert review, then to filing with the § 12-2603 certification, discovery, and settlement or trial. Here is the usual sequence:

1. Gather complete records. Federal law gives patients the right to copies of their records (45 C.F.R. § 164.524). Request the full chart, including monitoring strips, nursing notes and imaging, not a summary.
2. Identify every provider and entity. Determine who was involved and whether any provider is public or federal, which triggers the shorter notice rules.
3. Obtain expert review. A qualified expert meeting § 12-2604 evaluates the standard of care and causation.
4. File in superior court. The complaint is filed in the Arizona Superior Court for the appropriate county, with the written certification about expert testimony.
5. Serve the preliminary expert affidavit. If expert testimony is needed, the affidavit is served with the initial disclosures.
6. Conduct discovery. Both sides exchange documents, take depositions and disclose full expert opinions.
7. Resolve the case. Many cases settle, sometimes through mediation. Others go to a jury trial.

Separately, patients may file a complaint with the Arizona Medical Board. A board complaint can lead to discipline, but it does not compensate the patient or pause the lawsuit deadline.

What Key Decisions and Common Mistakes Should You Watch For?

The most damaging mistake in Arizona malpractice cases is assuming the two-year clock applies when the provider is a public entity, which generally means a 180-day notice of claim and a one-year lawsuit deadline. Other decisions deserve equal care.

Decisions you'll face

• When to act on a suspicion. The discovery rule can start the clock from the moment you reasonably should have suspected a problem, so the safer approach is to assume it may already be running.
• Whether to request records first. Requesting complete records early helps preserve evidence and lets an expert review the full picture.
• Who to name. Leaving out a responsible provider can allow defendants to blame a nonparty under Arizona's several-liability system.

Mistakes to avoid

• Relying on an apology. A provider's expression of sympathy is generally not admissible as an admission of fault under § 12-2605.
• Counting on the child's tolling for everything. The parents' claims may expire long before the child's.
• Filing without a qualified expert. An affidavit from an expert in the wrong specialty can lead to dismissal under §§ 12-2603 and 12-2604.
• Treating a complication as proof. Insurers and courts look at whether care fell below the standard, not just whether something went wrong.

When Should You Talk to a Lawyer, and What Does It Cost?

Arizona malpractice claims almost always require expert testimony, a certification at filing and a strict analysis of deadlines, so most patients benefit from legal advice before the earliest possible deadline passes. For medical malpractice other than birth injury, we recommend consulting a medical malpractice attorney licensed in Arizona about your specific case.

How contingency fees work

At Gilman & Bedigian, we take all personal injury cases on a contingency fee basis. That means attorney fees are paid from a recovery rather than upfront. Case expenses, such as expert review and deposition costs, are a separate topic. Ask any attorney you consult how fees and expenses are calculated and handled.

What affects timing

There is no reliable average timeline. Timing depends on how quickly records arrive, how many experts are needed, how many defendants are involved, whether a public entity requires a notice period first, and court scheduling. Severe injuries, especially to children, often require life-care plans and economic analysis that take time to prepare well. Our article on how to speed up a medical malpractice lawsuit covers what families can do. For other states' rules, see our medical malpractice and birth injury laws by state.

The information on this page is for general informational purposes and does not constitute legal advice. Every case is unique, and past results do not guarantee future outcomes. Contact a qualified attorney to discuss your specific situation.

If your baby was hurt during labor or delivery in Arizona, our firm handles birth injury cases nationwide and works with local counsel when required by the rules of a particular jurisdiction. You can bring the delivery date, hospital name and any records you already have. We answer our phone 24/7 at (800) 529-6162. No fee unless we win.

Frequently Asked Questions

How much does a medical malpractice attorney cost?

Many malpractice attorneys work on contingency, which means their fee comes from a recovery rather than from upfront payments. At Gilman & Bedigian, we take all personal injury cases on a contingency fee basis. Case expenses, including expert fees, are handled separately. Ask any lawyer you consult to explain both the fee percentage and how expenses are paid.

How long do I have to file a medical malpractice lawsuit in Arizona?

In Arizona, the general deadline is two years under A.R.S. § 12-542, measured from when you knew or reasonably should have known of the injury and its cause. A minor's own claim is generally tolled until age 18 under A.R.S. § 12-502. Claims against Arizona public entities generally require a notice of claim within 180 days and a lawsuit within one year.

Does Arizona have a cap on medical malpractice damages?

No. Article 2, Section 31 of the Arizona Constitution prohibits laws limiting damages for injury or death. Economic and non-economic damages are not capped. Punitive damages require clear and convincing evidence of especially wrongful conduct and are rare in malpractice cases.

What is my medical malpractice case worth?

Under Arizona law, value depends on proven damages: past and future medical costs, lost earning capacity, pain and suffering, and, for children, lifetime care needs. Because Arizona has no cap, these amounts are set by the evidence and the jury. Comparative fault under A.R.S. § 12-2505 can reduce an award. No honest estimate is possible before records and an expert review.

Should I accept the insurance company's first offer?

Not without understanding the full extent of the harm. In Arizona malpractice cases, future care costs and lost earning capacity often require expert analysis. Accepting a settlement generally ends the claim permanently. Before deciding, have the offer reviewed against a complete damages assessment.

What if I was partially at fault?

Arizona follows pure comparative fault under A.R.S. § 12-2505. Your damages are reduced by your percentage of fault, but you can generally still recover even if you were mostly at fault. A newborn cannot be at fault in a birth injury case, though defendants may argue other causes contributed.

How long does a medical malpractice case take to settle?

There is no fixed timeline in Arizona. Timing depends on records collection, the number of required experts under A.R.S. § 12-2604, the number of defendants, any public-entity notice period, and court schedules. Cases involving catastrophic injuries often take longer because future care must be carefully documented.

Do I need a lawyer for a medical malpractice claim?

Arizona law requires a written certification about expert testimony when filing. If an expert is needed, A.R.S. § 12-2603 also requires a preliminary expert opinion affidavit from an expert who meets A.R.S. § 12-2604. Missing these requirements can lead to dismissal. For malpractice other than birth injury, consult a medical malpractice attorney licensed in Arizona about your case.

What if the provider doesn't have insurance?

Coverage varies by provider. Hospitals and practice groups often carry liability coverage or self-insure, and they may be responsible for their employees' negligence. Identifying every responsible party matters under Arizona's several-liability rule in A.R.S. § 12-2506, because each defendant generally pays only its own share.

Will my case go to trial?

Many Arizona malpractice cases resolve through settlement or mediation, but some proceed to a jury trial in the county superior court. Preparing every case as if it will be tried helps a family evaluate any offer from a position of strength. Past results do not predict how any specific case will end.

How do I pay for treatment while my case is pending?

Most families rely on health insurance, Medicare or AHCCCS, Arizona's Medicaid program. These payers may have reimbursement rights from any recovery. Under A.R.S. § 12-565, collateral source payments may be introduced as evidence in Arizona malpractice cases. Liens should be addressed before any settlement is finalized.

What deadline applies if a baby was injured at a public hospital in Arizona?

Claims against Arizona public entities generally require a notice of claim within 180 days under A.R.S. § 12-821.01 and a lawsuit within one year under A.R.S. § 12-821. How a child's minority tolling interacts with these rules is a technical question. Families should seek advice as soon as possible after the injury.