Medicare in Arizona — plans and how to compare.
What Arizona residents should know about Medicare Advantage, Medicare Supplement, and Part D — and how plan availability differs in Arizona.
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Medicare basics in Arizona
Medicare is a federal program, so the core rules are the same in Arizona as everywhere else — but the specific plans available, premiums, and carrier networks vary by ZIP code and county.
Most Arizona residents become eligible at 65 through Social Security. See eligibility for full rules.
For the 7-month enrollment window timeline, see Turning 65.
What Arizona residents typically compare
- Medicare Advantage — Many Arizona counties have 20-50+ Advantage plans. Plans, premiums, and extras vary by county.
- Medicare Supplement (Medigap) — Plans are federally standardized but premium pricing and underwriting rules vary by state.
- Part D prescription drug plans — Available statewide but formularies and preferred pharmacies differ by plan.
See Medicare vs. Advantage for the side-by-side framework.
Arizona timing rules
The federal Medigap Open Enrollment window is the same everywhere — 6 months starting the month you turn 65 AND have Part B. During that window, no medical underwriting.
Outside that window, most states (including Arizona unless otherwise noted) allow Medigap carriers to use medical underwriting. Check Arizona's State Health Insurance Assistance Program (SHIP) for current state-specific rules.
How to compare plans in Arizona
- Confirm your ZIP — plans differ within Arizona by county
- List your prescriptions and check each on the plan's formulary
- Confirm your doctors are in-network
- Compare premium + deductible + maximum out-of-pocket
- Check extras (dental, vision, hearing) for plans you are weighing
- Ask about prior authorization requirements (common on Advantage)