Skip to content
Malpractice Center

Arizona medical malpractice law

Arizona usually gives you two years to file your malpractice claim if you're a patient there. You'll need your age and the injury's discovery date to work out when that clock started.

Sources checked

Free case review
Illustrative image of Arizona desert landscape with mountains and sparse cacti.
AI-generated image

Malpractice lawyers in Arizona

We're still putting together the Arizona list. A free case review reaches a lawyer who serves the state in the meantime, and you'll see your likely filing deadline.

Free case review

Be the first featured firm in Arizona

When the Arizona list goes up, one firm is shown first, above everyone, and labeled Featured.

See what's included
How a malpractice claim usually moves in Arizona
  1. 1.Something went wrong

    Write down dates and names while they're fresh.

  2. 2.Get your records

    Ask for your full chart and test results.

  3. 3.Free case review

    A lawyer looks at what happened, free.

  4. 4.Medical opinion

    A doctor checks whether the care fell short.

  5. 5.Start the claim in time

    Your lawyer starts the claim before the deadline.

  6. 6.Settlement or trial

    Many claims settle. Some go to a judge or jury.

Your deadline: 2 years from when you found out

Arizona rules at a glance

Work out your deadline
Filing deadline
2 years from when the injury was discovered
Damage caps
No cap
Before you file
An expert's sign-off on the claim
Shared fault
Pure comparative
Full Arizona law guidedeadlines, caps, children, experts and sources

Example: treatment and discovery six months ago

  • TreatmentMay 7, 2026
  • Likely deadlineMay 7, 2028
The filing deadline in Arizona
  1. The clock startsWhen you found out, or should have
  2. Time to start a claim2 yearsMiss it and the claim is usually lost.
Limits on damages in Arizona
  • Pain and sufferingNo cap
  • All damages togetherNo overall cap

The rules in Arizona

Filing deadline

2 years

Counted from when the injury was discovered. File within 2 years after the claim accrues. Medical malpractice claims accrue when the patient knew or reasonably should have known of the injury and that it was caused by someone's negligence.

Ariz. Rev. Stat. § 12-542(1)

Discovery rule

Applies

Yes. Arizona courts apply the discovery rule to medical malpractice claims.

Outer limit

None found

We found no statute of repose for Arizona.

Damage caps

No cap. The Arizona Constitution forbids laws limiting the amount of damages for death or personal injury (Ariz. Const. art. 2, § 31).

No damage caps of any kind in medical malpractice cases; the state constitution prohibits them.

Ariz. Const. art. 2, § 31

Children

Different clock

The clock does not run while the patient is under 18. A minor then has the same 2 years after turning 18 that an adult would have.

Affidavit of merit

Required

The claimant must certify whether expert testimony is needed and, if so, serve a preliminary expert opinion affidavit with the initial disclosures.

Ariz. Rev. Stat. § 12-2603

Notice before suing

Not required

No pre-suit notice requirement.

Shared fault

Pure comparative

Pure comparative fault: your award is reduced by your share of fault

Experts

Expert evidence

The standard-of-care expert must generally be licensed and specialize in the same specialty as the defendant, and have spent most of the prior year in active practice or teaching in that specialty (Ariz. Rev. Stat. § 12-2604).

Arizona courts struck down an earlier shorter deadline for children (Barrio v. San Manuel Division Hospital, 1984), so the general minority tolling statute applies.

You'll generally need to file your Arizona medical malpractice claim within two years. The clock began once you knew you were injured and that someone's negligence was involved, or reasonably should have known.

The treatment date isn't always the starting point for your deadline. Arizona uses a discovery rule, and its filing clock stays stopped while the injured patient is a minor. If later care revealed the harm, ask an Arizona lawyer early to help you figure out when your clock started.

This page can't give you legal advice. Once an Arizona lawyer reviews your treatment, they can explain how these filing rules affect the deadline for your claim.

When Arizona's filing clock starts

You'll find the general statute of limitations in Arizona Revised Statutes § 12-542(1). You start counting under Arizona's discovery rule when you know about the injury and that someone's negligence was involved (or reasonably should have known those things).

Filing deadlines in Arizona
  1. The injury

    The clock usually starts on the date of the malpractice or injury.

  2. Discovery

    Yes. Arizona courts apply the discovery rule to medical malpractice claims.

  3. 2 years

    File within 2 years after the claim accrues. Medical malpractice claims accrue when the patient knew or reasonably should have known of the injury and that it was caused by someone's negligence. (Ariz. Rev. Stat. § 12-542(1))

  4. Children

    The clock does not run while the patient is under 18. A minor then has the same 2 years after turning 18 that an adult would have.

Discovery is about more than the treatment date

Which dates matter here? Your notes need the treatment date, but also separate entries for when you learned of the injury and when information linked it to negligence. Your filing clock might not start on the day of an appointment.

Recall what you knew. Your first suspicion of malpractice might not be the discovery date, because the rule also asks what you reasonably should have known. A lawyer can use your chart and any explanation of the injury you received later to help figure out the discovery date.

Children have a different starting point

Until the patient turns 18, the filing clock won't run under Arizona Revised Statutes § 12-502. The adult two-year filing period begins when the patient turns 18. Children's earlier, shorter deadline ended when Arizona courts decided Barrio v. San Manuel Division Hospital back in 1984.

The injured child gets this protection for their own claim. That care may give other family members grounds for their own claims, too. If another family member has a claim, ask a lawyer to check its deadline separately rather than using the child's clock.

Arizona does not cap malpractice damages

Laws can't cap damages for death or personal injury because Article 2, § 31 of the Arizona Constitution forbids it. Your Arizona medical malpractice claim has no cap on non-economic damages, either.

No damage caps of any kind in medical malpractice cases; the state constitution prohibits them.
DamagesLimit in Arizona
Non-economic (pain and suffering)No cap. The Arizona Constitution forbids laws limiting the amount of damages for death or personal injury (Ariz. Const. art. 2, § 31).

You can't count on getting paid. Knowing Arizona doesn't cap damages won't tell you what a particular claim is worth or whether the patient can actually prove the case. Before talking about a possible case value, ask the lawyer to explain the link between the alleged negligence and the harm.

Ask an Arizona lawyer which rules would apply to your claim if you're considering punitive damages or a wrongful death case. You'll still have questions about damages that the Constitution's ban on caps doesn't answer.

What a claim needs before and at filing

You can file an Arizona medical malpractice claim without giving pre-suit notice. You'll still have to certify whether expert testimony is needed for your claim. You'll have to serve a preliminary expert opinion affidavit with your initial disclosures under Arizona Revised Statutes § 12-2603 if your claim needs expert testimony.

What a claim needs in Arizona
RequirementThe rule
Affidavit or certificate of meritThe claimant must certify whether expert testimony is needed and, if so, serve a preliminary expert opinion affidavit with the initial disclosures.
Notice before suingNo pre-suit notice requirement.
Expert evidenceThe standard-of-care expert must generally be licensed and specialize in the same specialty as the defendant, and have spent most of the prior year in active practice or teaching in that specialty (Ariz. Rev. Stat. § 12-2604).
Shared fault rulePure comparative fault

The affidavit and the expert's qualifications

Don't confuse the certification with the affidavit you'll need to serve. If your certification says expert testimony is needed, the preliminary affidavit goes with your initial disclosures when you serve them. Ask your lawyer what your claim requires and when you'll need to serve the affidavit.

Arizona Revised Statutes § 12-2604 generally requires a licensed standard-of-care expert who works in the defendant's specialty. You'll also need to check that they've spent most of the prior year actively practicing or teaching in that specialty to qualify. Don't assume someone meets those requirements just because they have a medical background.

Start by discussing the provider's specialty. The proposed expert's title isn't enough; have your lawyer explain how their practice or teaching meets Arizona's requirements.

Shared fault can affect recovery

The rule in Arizona is pure comparative fault. Patients who share fault aren't automatically barred from bringing a claim, but they may recover less. Ask your lawyer what it could mean for your case if the provider argues that something you did contributed to the injury.

Your whole story matters. When you tell the lawyer which instructions you received, point out anything about them that you think is disputed. Your lawyer still needs to assess the facts of your case under Arizona's rule, even though the comparative-fault chart published by Matthiesen, Wickert & Lehrer, S.C. tells you what that rule is.

How a malpractice case usually proceeds

After a consultation, your case may follow this general path toward a possible resolution. That schedule can change. Ask the lawyer what pursuing your claim would take before you decide whether to go ahead.

From the first consultation to settlement or trial
  1. Review the treatment and deadline

    You'll want a written timeline for that first consultation. The lawyer compares your treatment date with what you learned later to work out when Arizona's discovery rule started your filing clock. The lawyer also needs the patient's age if they're a child.

  2. Examine the records and need for medical testimony

    Ask whether you'll need expert testimony as you and the lawyer review the chart. You might need a standard-of-care expert. The lawyer should check whether that person meets Arizona's qualifications before using their opinion.

  3. Prepare the complaint and required disclosures

    Your lawyer prepares the lawsuit and the expert-testimony certification once you decide to go ahead with the claim. Arizona requires a preliminary expert opinion affidavit with your initial disclosures if the claim needs expert testimony. Ask how the filing plan accounts for those requirements.

  4. Develop the disputed issues

    After the lawsuit is filed, each side works out its arguments about the patient's care and injury. Ask whether more records or testimony are needed to address the alleged negligence and any shared-fault argument, and how the lawyer will handle those issues.

  5. Consider settlement or prepare for trial

    Your case could end in settlement or reach trial. Have the lawyer explain what's still disputed, along with any settlement proposal. Even when an expert supports your claim, Arizona's lack of damage caps doesn't promise a particular result.

What you can do now

A short timeline comes first. Before deciding for yourself whether the care was negligent, you can ask a lawyer to review it.

  • Write when you first learned of the injury next to the treatment date. Record the date of any explanation linking the injury to possible negligence.
  • While you're gathering medical records, tell the lawyer which parts of the chart are still missing.
  • If the patient is a child, tell the lawyer right away. Whose possible claims does the lawyer plan to review?
  • Have the lawyer check for an outer filing limit while working out your deadline. Talk through the expert affidavit while you're still deciding whether to file.

Tell the lawyer what changed for you after the care. What still doesn't make sense to you? You don't have to decide what those changes mean medically or legally for the lawyer to start with your account.

Questions patients ask about Arizona malpractice claims

Sources

  1. Arizona Revised Statutes § 12-542, Arizona Legislature
  2. Arizona Revised Statutes § 12-502, Effect of minority, Arizona Legislature
  3. Arizona Revised Statutes § 12-2603, Preliminary expert opinion testimony, Arizona Legislature
  4. Arizona Constitution art. 2, § 31, Damages for death or personal injuries, Arizona Legislature
  5. State Enactments of Selected Medical Liability Reforms (as of 8/27/2026), Medical Professional Liability Association
  6. Contributory Negligence/Comparative Fault Laws in All 50 States (updated 6/10/2026), Matthiesen, Wickert & Lehrer, S.C.
  7. Medical Liability/Malpractice Merit Affidavits and Expert Witnesses, National Conference of State Legislatures

Questions about malpractice in Arizona

How long do I have to sue for medical malpractice in Arizona?
Arizona generally gives you two years to file after your claim accrues. Your medical malpractice claim accrues once you know you've been injured because of someone's negligence, or reasonably should have known that. You'll count from discovery. After reviewing your treatment history, an Arizona lawyer can explain which date applies to your claim.
Can I sue for medical malpractice 20 years after treatment?
It depends on your circumstances. While the injured patient is under 18, Arizona's filing clock doesn't run; the state also uses a discovery rule. You'll still need a local lawyer to check for a separate outer-limit rule. Ask an Arizona lawyer to assess the patient's age and discovery dates before assuming the older claim can go ahead.
Is it worth suing for medical malpractice in Arizona?
Your claim needs a closer look. Knowing that Arizona has no damages cap won't tell you whether to sue. Once a lawyer checks your filing deadline and need for expert testimony, you can discuss the alleged negligence and resulting injury. Ask what you'd need to pursue the case. Don't assume your claim has value or that recovery is promised just because there's no cap.
What is the hardest element to prove in a medical malpractice case?
Which issue is hardest to prove depends on the Arizona case. Arizona's rules govern expert testimony, so ask about it early. You'll certify whether your claim needs expert testimony; if it does, include a preliminary expert opinion affidavit with the initial disclosures. Your lawyer can explain which medical issue needs support, including whether the proposed standard-of-care expert meets Arizona's qualification requirements for it.
How do I choose a medical malpractice attorney in Arizona?
Have the lawyer explain how they'd prepare the required expert-testimony certification and assess your discovery date. Have the lawyer explain how they'd check the person's qualifications under Arizona law if your claim needs an expert. If a child was injured, bring up minority tolling. Keep asking what you'll actually need to pursue your claim. A promised outcome shouldn't stop you from asking the lawyer those questions.
Do I need an expert affidavit before filing in Arizona?
Arizona requires you to certify whether expert testimony is needed for your claim. Under Arizona Revised Statutes § 12-2603, the claimant must serve a preliminary expert opinion affidavit with initial disclosures whenever the claim needs expert testimony. Arizona doesn't require pre-suit notice; don't confuse the requirements. Have an Arizona lawyer explain when to handle the certification and affidavit in your filing schedule.
Can I bring a claim if I was partly at fault?
If a patient shares fault, Arizona's pure comparative fault rule can reduce recovery without automatically barring the claim. The lawyer must assess what happened, including the patient's share of fault. Before asking how it could affect their assessment of your claim, tell your lawyer about conduct the provider may dispute.

Hurt by medical care in Arizona? Let's talk it through.

Most people who reach out aren't sure yet, and that's fine. Share a few lines and a malpractice lawyer near you can look at it with you, at no cost.

  • It's free, and talking to a lawyer doesn't commit you to anything.
  • Where we know the local rules, you'll see your likely filing deadline right away.
  • Your answers are encrypted and never sold or used for ads.

Start with one question

Free and private, never used for ads

Get the top spot in Arizona

The featured spot on this page is open. Whoever takes it is the first lawyer people see when they come here looking for help.

  • One featured spot per list, so you're never one of several
  • Shown first and labeled Featured, for a year
  • Your photo, your bio, a call button and case review requests

From $6,000a year, state or province page

Every plan and market or ask to be considered for the list itself, which is free.

Ask about this spot

  • Arizona medical malpractice law

A flat yearly fee, labeled Featured on the page. Never a share of any case.

Hurt by medical care?Talk it through with a lawyer, free.