An Arizona workers’ compensation claim starts the moment you tell your employer you’ve been hurt on the job. From there, you have one year from the date of injury to file a formal claim with the Industrial Commission of Arizona (ICA), and the employer’s insurance carrier has 21 days from notification to accept or deny it. If the carrier accepts, your medical treatment is paid in full and wage replacement begins. If it denies, you can request a hearing before an administrative law judge.
The system is no-fault. You don’t have to prove your employer did anything wrong, and in exchange, workers’ compensation is the only remedy you can pursue against your employer for a workplace injury.1Arizona Legislature. Arizona Revised Statutes 23-1022 – Right of Employee to Compensation; Exclusive Remedy A direct lawsuit against the employer is possible only in the narrow case where the employer acted with willful intent to injure, defined by statute as an act done knowingly and purposely with the direct object of injuring another person. Ordinary negligence or weak safety practices do not clear that bar.
Who Is Covered
Nearly every employer in Arizona must carry workers’ compensation coverage, including the state, counties, cities, towns, school districts, and any business that regularly employs workers, whether full-time, part-time, seasonal, or temporary.2Arizona Legislature. Arizona Revised Statutes 23-902 – Employers Subject to Chapter; Exceptions “Regularly employed” is read broadly and covers work in the employer’s usual trade or business even when the work only runs part of the year.
Two groups fall outside the mandate. Domestic servants are explicitly excluded. Independent contractors are also generally excluded, but the test is strict: the worker has to be genuinely independent in how the work is performed, free from the business’s control over methods, and engaged to produce a specific result. A written contract calling you an independent contractor creates a presumption, but the ICA and courts look at the actual working arrangement, not just the label.
If an employer who should carry coverage doesn’t, the injured worker can sue directly in civil court instead of being limited to workers’ compensation benefits.
What Injuries Qualify
A compensable injury must arise out of and happen during the course of employment.3Arizona Legislature. Arizona Revised Statutes 23-1021 – Right of Employee to Compensation Both halves count: the injury has to be connected to the work and has to occur on the job. Self-inflicted injuries don’t qualify. Everything else is in play, from a single traumatic event like a fall or an equipment failure to occupational diseases that build up over months or years of repetitive exposure or strain.
Pre-Existing Conditions
A prior condition does not automatically kill your claim. Arizona follows the aggravation rule: if your job made an existing condition measurably worse, the worsened portion is compensable. The practical test is whether the work incident required more or different medical treatment than you needed before. A manageable bad back that gets pushed into surgery by a workplace lift is a classic example. The insurer owes benefits for the aggravation, not for the underlying condition.
Mental Health Claims
Psychological injuries face a higher bar. A mental condition is not compensable unless unexpected, unusual, or extraordinary workplace stress was a substantial contributing cause.4Arizona Legislature. Arizona Revised Statutes 23-1043.01 – Heart-Related and Mental Cases Routine job pressure, personality conflicts, and ordinary discipline don’t qualify. The Arizona Supreme Court upheld this heightened standard against constitutional challenge.5Justia. Matthews v. Industrial Commission A mental condition that follows from a physical workplace injury can be compensable without meeting the extraordinary-stress requirement.
Reporting the Injury and Filing the Claim
Report the injury to your employer as soon as you can. Once notified, the employer has ten days to report the injury to their insurance carrier and to the ICA. The formal claim itself has a hard one-year deadline, measured from the date of injury or, for an occupational disease, from the date you first became aware of it. Miss that window and you lose the right to benefits altogether.
The claim is filed on the Worker’s Report of Injury, known as Form 407.6Industrial Commission of Arizona. Worker’s Report of Injury Form The form asks for the date, time, and location of the incident, how the injury happened, the body parts affected, and the employer’s contact information. A treating physician separately submits a medical report to the ICA with the clinical findings and diagnosis. You can file through the ICA online portal, by mail, or in person.
Treat the initial paperwork seriously. Inconsistencies between what you write on Form 407 and what the medical report says give the insurer an easy opening to investigate or deny. Describe how the injury happened with precision, name witnesses, and keep the account you give your doctor aligned with the account on the form.
What Happens After You File
When the ICA receives your Form 407 or the physician’s report, it sends a New Claim Notification to the employer’s insurance carrier. The carrier then has 21 days from that notification to issue a Notice of Claim Status (Form 104) accepting or denying the claim.7Industrial Commission of Arizona. Workers’ Compensation Claims Seminar Manual If the claim is accepted, medical bill payments and wage replacement begin. If it is denied, the notice has to state the reason.
The 21-day clock has teeth. If the carrier does not deny within 21 days on a claim involving more than seven days of lost work time, it must begin paying benefits as though the claim were accepted. These penalty benefits run from the date of first notification until the carrier finally issues a denial, and they cover both wage replacement and medical costs.8Arizona Legislature. Arizona Revised Statutes 23-1061 – Procedures; Investigations; Claims
What Benefits You Can Receive
Every dollar figure in your claim traces back to one number: your average monthly wage (AMW) at the time of injury.9Arizona Legislature. Arizona Revised Statutes 23-1041 – Basis for Computing Compensation; Definition The ICA calculates it from your pre-injury earnings. Arizona caps the AMW; for injuries occurring in 2025, the maximum was $5,906.55 per month, and benefits for workers who earned more are still calculated against that ceiling.10Industrial Commission of Arizona. Claims – AMW Statutory Maximum Information Page
Medical Treatment
All reasonable and necessary medical care related to an accepted claim is covered. No dollar limit, no copays. That includes surgery, hospital stays, prescriptions, physical therapy, and diagnostic testing. The insurer typically selects the treating physician, though you can ask the ICA for a change of doctor.
Temporary Disability
If your injury keeps you completely off work, temporary total disability pays two-thirds of your AMW. There is a seven-day waiting period before benefits start. If the disability lasts longer than 14 days, the carrier pays those first seven days retroactively.
If you can work in a reduced capacity but earn less than before, temporary partial disability covers two-thirds of the difference between your pre-injury wages and what you can currently earn.11Arizona Legislature. Arizona Revised Statutes 23-1044 – Compensation for Partial Disability; Computation Both temporary benefit types end when you reach maximum medical improvement, the point at which your condition has stabilized and no significant further recovery is expected.
Permanent Partial Disability
When an injury leaves lasting impairment, permanent partial disability (PPD) compensates for that permanent loss. Arizona uses a statutory schedule assigning a set number of months of compensation to each body part. PPD is paid at 55% of your AMW, or 75% if you cannot return to the type of work you were doing when you were hurt.11Arizona Legislature. Arizona Revised Statutes 23-1044 – Compensation for Partial Disability; Computation A partial loss of use is paid proportionally: a 40% loss-of-use rating on a leg pays 40% of the months the schedule provides for a full leg loss.
Death Benefits
If a workplace injury or illness is fatal, dependents receive ongoing compensation based on the deceased worker’s AMW. A surviving spouse with no children receives 66⅔%. A spouse with children receives 35%, and the children collectively share an additional 31⅔%. If there is no surviving spouse, the children collectively receive 66⅔%.12Arizona Legislature. Arizona Revised Statutes 23-1046 – Death Benefits Dependent parents, siblings, and partial dependents may qualify for reduced percentages. Burial expenses up to $5,000 are also covered, though 2025 legislation proposed raising that cap to $10,000, so check the current statute for the up-to-date figure.
Arizona also protects you from retaliation. Firing an employee for exercising rights under the workers’ compensation statutes is a wrongful termination that supports a separate legal claim.13Arizona Legislature. Arizona Revised Statutes 23-1501 – Severability of Employment Relationships; Protection from Retaliatory Discharges
If Your Claim Is Denied
A denial is not the end. You can file a Request for Hearing with the ICA, which assigns the case to an administrative law judge. The judge holds a formal hearing where both sides present evidence, including medical records, witness testimony, and expert opinions, and then issues a written decision. Either side can appeal further through the Arizona court system.
Proceedings get more formal as they move up, and most workers benefit from legal representation by the hearing stage. Attorney fees in workers’ compensation cases are capped by Arizona law, and attorneys in this area typically work on contingency, collecting only if the claim succeeds.
Reopening a Closed Claim
An injury that seemed resolved can come back months or years later. Arizona lets you petition to reopen a previously closed claim if a new, additional, or previously undiscovered condition develops that is related to the original industrial injury. The petition must include a physician’s statement describing the current condition and its connection to the workplace injury.7Industrial Commission of Arizona. Workers’ Compensation Claims Seminar Manual You can file more than one reopening petition over your lifetime.
Two limits apply. A claim cannot be reopened if it was denied and that denial became final because no one requested a hearing in time. And if you accepted a full and final settlement that explicitly waived your right to reopen, that waiver is binding. Before signing any settlement, know whether you are trading away the ability to come back later; it is one of the most consequential choices in a workers’ compensation case.
Reopening restarts the same 21-day response clock, and the same penalty benefits apply if the carrier misses it.8Arizona Legislature. Arizona Revised Statutes 23-1061 – Procedures; Investigations; Claims Diagnostic testing tied to the original injury should be covered by the carrier without a formal reopening at all.