When is Medicare open enrollment for 2027 in Arizona?

This is the Annual Enrollment Period for Medicare Advantage and Part D. In Maricopa County you can choose among 52 Medicare Advantage plans for 2027; in Pinal County, 47.

Medicare enrollment windows around the 2027 plan year

Window	Dates	What you can do
Annual Enrollment Period	Oct 15 to Dec 7, 2026	Join, switch or drop Medicare Advantage or Part D for January 1, 2027
Medicare Advantage Open Enrollment	Jan 1 to Mar 31, 2027	One change if you are already in a Medicare Advantage plan
Initial Enrollment Period	7 months around your 65th birthday month	First enrollment in Parts A, B, C and D
Special Enrollment Periods	Varies	After a move, loss of other coverage, a plan non-renewal and other events

How the fall window works

Between October 15 and December 7 you can move from Original Medicare to a Medicare Advantage plan, from one Advantage plan to another, back to Original Medicare, or change your stand-alone Part D plan. The last choice you make in the window is the one that counts.

Medigap is different: it is not tied to this window, and in Arizona switching Medigap policies later usually means answering health questions.

What changes on January 1

Your plan mailed an Annual Notice of Change by September 30 listing its 2027 premium, deductible, out-of-pocket maximum, drug list and network. In Maricopa County the average in-network out-of-pocket maximum for 2027 is $4,896, and the range is $2,000 to $8,900. Doing nothing keeps you in your plan with those new terms.

What to do before December 7

List your doctors, your prescriptions and your pharmacy, then compare your current plan with the alternatives. Viola runs free Medicare workshops online and in Chandler, and we offer one-on-one plan reviews at the office or by phone.

Related questions

Sources

1. Medicare & You 2027 handbook Centers for Medicare & Medicaid Services
2. CMS Medicare Advantage and Part D Landscape, Contract Year 2027 Centers for Medicare & Medicaid Services

Please note: We do not offer every plan available in your area. Any information we provide is limited to those plans we do offer in your area. Please contact Medicare.gov, 1-800-MEDICARE, or your local State Health Insurance Program (SHIP) to get information on all of your options.Rise Up Benefits Group is not connected with or endorsed by the United States government or the federal Medicare program. Medicare has neither endorsed nor reviewed this information.