If you're driving from your Chicago home to winter in Sun City or Sun City West, Arizona's medical review requirements for drivers over 70 — and how they interact with your two-state insurance setup — are stricter than most snowbirds expect.
Does Arizona Require Medical Review for Snowbirds Over 70?
Arizona requires drivers age 70 and older to complete vision screening at every renewal, but the state does not mandate cognitive or full medical review for age alone. The confusion arises because Arizona does authorize medical review referrals at any age if a licensing examiner, law enforcement officer, or physician submits a Driver License Medical Review Report — and referral rates increase sharply after age 75.
If you maintain Illinois registration and an Illinois license, Arizona's age-based vision screening does not apply to you. You drive in Arizona as a visitor under your valid out-of-state license. Illinois requires vision testing at every renewal for all drivers but does not mandate medical review based solely on age.
The registration decision matters because once you establish Arizona residency and transfer your license, you enter Arizona's renewal cycle permanently. If you're 72 and transfer now, your next Arizona renewal at 77 triggers vision screening and possible medical review referral if any examiner concern exists. That referral process can take 60 to 90 days and suspend driving privileges until cleared.
When Does Arizona Residency Status Require Changing Registration?
Arizona law requires you to register your vehicle in Arizona within 15 days of establishing residency. The state defines residency as present in Arizona for more than seven months in any calendar year, or claiming Arizona as your domicile for tax purposes, or registering to vote in Arizona. Days do not need to be consecutive.
Most Chicago snowbirds spending November through April in Sun City (six months) remain Illinois residents legally. If you extend your stay to eight months, or file Arizona state tax as a resident, or register to vote in Maricopa County, you trigger mandatory Arizona registration. The consequence of missing that 15-day window after establishing residency is a Class 2 misdemeanor, and your Illinois-based auto insurance may deny a claim if the carrier discovers you violated residency registration requirements.
Illinois does not require you to surrender Illinois registration because you spend winters elsewhere, as long as Illinois remains your legal domicile. You maintain one primary residence for registration purposes. Dual registration in both states is illegal.
How Does Two-State Driving Affect Your Insurance Coverage?
Your Illinois auto insurance policy covers you when driving in Arizona temporarily, but coverage depends on your policy remaining accurate about where the vehicle is garaged. If your car spends November through April parked at your Sun City address, most carriers require you to update your garaging address seasonally. Failing to report that change allows the carrier to deny claims based on material misrepresentation.
Some carriers handle snowbird situations with a single policy listing both addresses and adjusting the garaging location by season. Others require you to cancel and rewrite the policy when you change states, which creates a coverage gap risk and often costs more due to new policy fees. A small number of carriers offer specific snowbird endorsements that cover both locations under one continuous policy, but availability varies by state and underwriting tier.
Rates typically increase when adding an Arizona garaging address because Arizona's average liability claim severity runs 15 to 25 percent higher than Illinois, and comprehensive claims for hail and theft are more frequent in the Phoenix metro area. Expect your combined annual premium to rise $200 to $500 compared to an Illinois-only policy, depending on your coverage selections and driving record.
What Happens If a Medical Review Is Triggered in Arizona?
If Arizona's Motor Vehicle Division refers you for medical review, the state mails a notice requiring you to have a physician complete the Medical Review Report form within 30 days. The form asks the physician to assess whether any medical condition impairs your ability to drive safely. Common triggers include vision below 20/40 corrected, diabetes with recent hypoglycemic episodes, seizure disorders, dementia, or any condition causing loss of consciousness.
Your physician submits the completed form to the MVD Medical Review Program. A staff physician reviews it and determines whether to clear you, impose restrictions (daylight only, area restrictions, no freeway), require a behind-the-wheel test, or suspend your license pending further evaluation. Processing typically takes 45 to 75 days. Your license remains valid during review unless the referral was initiated by law enforcement after an accident or observed driving incident, in which case suspension is immediate.
If your Arizona license is suspended during medical review and you have not yet transferred from Illinois, you can continue driving on your valid Illinois license while in Arizona. Once you transfer to Arizona and enter medical review, you cannot revert to Illinois licensure to avoid the review. The review must be completed or you cannot drive legally in either state.
Should You Transfer to Arizona Registration or Stay Illinois-Based?
Most Chicago snowbirds spending five to six months in Sun City benefit from keeping Illinois registration and Illinois insurance. You avoid Arizona's higher insurance rates, you bypass the state's age 70+ vision screening at renewal, and you eliminate the risk of medical review referral triggered by routine renewal examiner discretion.
Transferring to Arizona registration makes sense if you spend more than seven months per year in Arizona, if you claim Arizona residency for tax purposes, or if your Illinois insurance carrier will not cover seasonal garaging in Arizona. Arizona's lower vehicle registration fees and absence of front license plate requirement appeal to some drivers, but those benefits rarely offset the insurance cost increase and medical review exposure for drivers over 70.
If you are currently under medical review in Illinois or have a restricted license due to a medical condition, transferring to Arizona does not reset that status. Arizona's MVD requests out-of-state driving records and medical review history when you apply for license transfer. A restriction in Illinois typically transfers to Arizona, and may trigger additional Arizona medical review at the point of transfer.
How to Maintain Compliant Coverage Across Both States
Contact your Illinois insurance carrier before your first season in Arizona and ask whether your policy covers seasonal garaging at your Sun City address. Request written confirmation and ask whether you need to update your garaging address each season or if the carrier will note both locations on your policy. If your carrier requires cancellation and rewrite when you change states, ask for referral to a carrier that writes snowbird policies.
Verify your policy meets Arizona's minimum liability requirements: $25,000 per person and $50,000 per accident for bodily injury, plus $15,000 for property damage. Illinois requires $25,000/$50,000/$20,000, so your Illinois policy already meets Arizona's bodily injury minimum but may fall short on property damage. Most carriers write policies at $25,000 property damage or higher, which covers both states.
Keep proof of insurance accessible in your vehicle at all times in Arizona. Arizona law enforcement can issue a citation for failure to provide proof of insurance even if you are insured, and the fine starts at $500 for first offense. Illinois accepts electronic proof of insurance; Arizona accepts electronic or paper. Store a PDF copy on your phone and keep a paper card in your glove box.
