Can I use my Medicare Advantage plan in another state?
Half the north Valley is somewhere cooler right now, and a fair number of those people are seeing a doctor while they are there. Here is what your plan actually does once you leave Maricopa County, how long you are allowed to be gone, and why the fix has to happen before December 7.
Emergency and urgent care, yes — every Medicare Advantage plan covers those anywhere in the United States. Routine care is the part that catches people out, because that runs through a network, and most networks stop at a county line. And there is a second rule almost nobody hears about until it bites: stay away from your plan’s service area for more than six consecutive months and the plan is required to drop you.
In August, in the north Valley, that is not a hypothetical. A good share of the people I talk to in Anthem, Carefree and New River are somewhere else right now, and some of them are sitting in a waiting room while they are there.
What your plan actually covers once you leave Arizona
Three different things are going on, and it helps to separate them.
Emergency and urgent care travels. This one is federal and it is not optional. A Medicare Advantage plan has to cover emergency care and urgently needed care anywhere in the United States, at your in-network cost sharing, whether or not the hospital is in the plan’s network. Nobody has to talk you into an ambulance.
Routine care depends on the plan type. A follow-up with a cardiologist, an infusion, a scheduled scan, physical therapy after a knee — that is routine, and it is where the network rules apply:
- HMO. Generally no coverage out of network except emergency and urgent care. Care you schedule somewhere else is usually yours to pay for in full.
- PPO. Out-of-network care is covered, at a higher share and against a separate, higher out-of-pocket maximum. It works; it costs more.
- A plan with a visitor or traveler benefit. Some plans add one. It treats you as in-network in specified areas for a defined stretch of time. These are not standardized, they are not on every plan, and the areas are the plan’s choice, not yours.
Dialysis is its own case. If you need dialysis, plans must cover it out of area — that is the one chronic service with a travel rule of its own.
The practical takeaway is dull but it is the whole ballgame: the answer for your plan is in your Evidence of Coverage, the fat document that arrived in the mail and went in a drawer. Not the brochure, not the TV spot.
How long can you be away before the plan drops you?
This is the rule that surprises people, and it is not a carrier’s policy — it is CMS’s, in the enrollment and disenrollment guidance and in the regulation behind it.
| How long you are away | Medicare Advantage, no travel benefit | Medicare Advantage with a visitor/traveler benefit | Standalone Part D drug plan |
|---|---|---|---|
| Up to 6 consecutive months | Enrollment continues | Enrollment continues | Enrollment continues |
| More than 6, up to 12 consecutive months | Disenrollment is required, effective the first day of the month after the sixth month | Enrollment continues, within the United States | Enrollment continues |
| More than 12 consecutive months | Already disenrolled | Disenrollment is required, effective the first day of the 13th month | Disenrollment is required, effective the first day of the 13th month |
Source: CMS, CY2026 Medicare Advantage and Part D Enrollment and Disenrollment Guidance, §§ 60.2.1.2 and 60.2.1.2.1, and 42 CFR § 422.74(d)(4). "Consecutive" is the operative word — the clock is about one unbroken absence, not days added up across the year.
Two things worth underlining. The first is that this is mandatory on the plan, not discretionary: the words in the guidance are that the organization must disenroll. The second is that the plan usually finds out from returned mail. If a plan’s mailing comes back undeliverable with no forwarding address, that starts the enquiry — which is a genuinely silly way to lose your coverage, and an easy one to avoid by keeping mail forwarding and your plan’s address on file straight.
If you are disenrolled this way, you land on Original Medicare, and there is a Special Enrollment Period attached to it — but it is a narrow one that runs from the sixth through the eighth month of the absence. What actually counts as a qualifying event is a shorter list than most people assume.
Which address does Medicare use if I have two homes?
One permanent residence. It should be the address Social Security has, and it should agree with your tax return, your driver’s license and your voter registration.
That address is doing more work than it looks. Medicare Advantage and Part D availability is set county by county — so your permanent address decides which plans you may enroll in at all. A second home does not give you a second menu, and it does not entitle you to a plan from that other county. What it gives you is a place you are temporarily absent from your service area.
And “temporarily” has a floor: you have to actually live at the permanent address. Half the year is the usual shorthand. If the true center of your life has moved, the honest answer is that you have moved, and the move is a Special Enrollment Period — one that begins the month before the move if you tell the plan in advance, and runs two months past.
Why a supplement is the boring answer for part-year residents
If your life genuinely runs across two places, there is a structural answer rather than a clever one.
A Medicare Supplement sits on top of Original Medicare, and Original Medicare has no network. Any provider in the country who accepts Medicare assignment bills it the same way whether the office is in Anthem or two thousand miles away. There is no service area to be absent from, no prior authorization from a plan, and no version of the six-month problem above. Pair it with a standalone Part D plan and your drug coverage travels to any in-network pharmacy too.
The trade is honest and it is a real one. You pay a monthly premium for the supplement on top of your Part B premium, you pay a separate drug plan premium, and you give up the extras that get bundled into Medicare Advantage plans. What you buy is predictability and geography. For a household with the income to absorb a fixed monthly cost, that trade often reads differently than it does on paper — a known premium is easier to plan around than an unknown out-of-network bill in a month when you are three states away.
One timing point that matters more than the comparison itself: medical underwriting. Your six-month Medigap Open Enrollment starts the month your Part B begins, and during it no carrier can decline you or price you up for your health history. Arizona has no birthday rule and no annual guaranteed-issue window to fall back on — a few states let people switch supplements each year without underwriting, and this is not one of them. So “I will move to a supplement when travelling gets complicated” is a plan that depends on your health at the time you try it.
If you are weighing the two routes, the plan type finder asks six questions and points at one of them, and Plan G versus Plan N covers the choice inside the supplement side.
The Maricopa County wrinkle
Two local facts pull in opposite directions here.
The first is that the Phoenix metro has one of the deeper Medicare Advantage menus in the country. That is genuinely good news if you stay put — competition here produces plans with benefits that thinner markets do not see.
The second is that depth is built on local networks. The plans available in Anthem, Carefree and north Phoenix are drawn around Valley hospital systems, and a network assembled around care in Maricopa County is, by construction, a network that ends near Maricopa County. The same feature that makes the menu attractive is the one that makes it stay home. That is not a knock on any plan; it is what a network is. How Medicare Advantage networks work goes through it properly.
There is a north-valley version of this that has nothing to do with leaving Arizona, too. Anthem, New River and Desert Hills sit at the top edge of the county, and a plan can be perfectly good in central Phoenix while the nearest in-network specialist is a forty-minute drive down I-17. Worth checking against your own doctors before the network question ever becomes a travel question.
What Original Medicare and Part D cost you when you travel
A few figures that do not change with geography, because they are federal:
$2,100 — the 2026 annual out-of-pocket cap on covered drugs
It applies to Part D coverage whether it is standalone or bundled inside a Medicare Advantage plan, and it applies at any in-network pharmacy in the country. Original Medicare, by contrast, leaves you 20% coinsurance with no annual cap at all — which is the gap a supplement is built to close.
Source: CMS 2026 Part D fact sheet and the 2026 Parts A & B premiums and deductibles fact sheet. Figures verified against cms.gov.
One more that is worth knowing before a trip abroad rather than after: Original Medicare generally does not cover care outside the United States. Several standardized Medigap plans include a limited foreign travel emergency benefit, subject to a deductible and a lifetime maximum. It is a real benefit and it is not a travel insurance policy — read the specifics before you rely on it.
What to do between now and December 7
If this summer produced a bill you did not expect, or a “we don’t take that plan” at a front desk somewhere, the window to fix it is the Annual Enrollment Period: October 15 through December 7, for coverage starting January 1. Nothing about being away in August creates a Special Enrollment Period on its own.
Three things worth doing before then:
- Count the days, honestly. How many consecutive months were you out of Maricopa County? If it is heading past six and you are on a Medicare Advantage plan without a travel benefit, that is a live problem, not a theoretical one.
- Find the travel section of your Evidence of Coverage. Look for the words “visitor”, “traveler” or “out of area”. Whether one exists on your plan is the single fact that determines everything above.
- Write down what you actually used away from home — which doctors, which pharmacies, which town. That list is what makes an October comparison a real comparison rather than a premium-shopping exercise.
And if the honest answer is that you do not know which kind of plan you have — which is common, and not a failure on anyone’s part — that is a short phone call rather than an afternoon with a 200-page document. Call (602) 844-6002 and we will look at your Evidence of Coverage together. It costs nothing, and if the answer turns out to be “your plan already handles this”, that is what you will hear.
Common questions
Can I use my Medicare Advantage plan in another state?
For emergency and urgent care, yes — every Medicare Advantage plan covers those anywhere in the United States, at in-network cost sharing. For routine care, it depends on the plan. An HMO generally pays nothing out of network, a PPO pays at a higher out-of-network share, and some plans add a visitor or traveler benefit that treats you as in-network in specified areas. The answer is in your plan's Evidence of Coverage, not in the brochure.
How long can you be out of your Medicare Advantage plan's service area?
Six consecutive months, unless your plan offers a visitor/traveler benefit. CMS requires the plan to disenroll you once an absence from the service area exceeds six consecutive months, effective the first day of the calendar month after those six months. Where a plan does offer a visitor/traveler benefit, the limit stretches to 12 consecutive months within the United States. A standalone Part D drug plan has its own, longer limit of 12 consecutive months.
Which address does Medicare use if I live in two places?
One permanent residence, and it should be the address Social Security has on file — normally the one on your tax return, your driver's license and your voter registration. That address decides which Medicare Advantage and Part D plans you are even eligible for, because availability is set county by county. A second home does not give you a second plan menu, and you do not change your address every time you travel.
Does a Medicare Supplement plan work in any state?
Yes. A Medigap policy sits on top of Original Medicare, and Original Medicare has no network — any provider in the country who accepts Medicare assignment is covered on the same terms as one down the road in Anthem. That is the structural reason a lot of part-year Arizona residents end up with a supplement plus a drug plan rather than an all-in-one plan.
Can I fill my prescriptions out of state on a Medicare drug plan?
At any pharmacy in your plan's network, which for most plans means the large national chains in most of the country. What varies is the price tier — a pharmacy can be in network without being a preferred one, and the difference at the counter is real. Check the specific pharmacies you would use in both places, and ask about mail order, where you only change the delivery address.
If my plan does not travel well, when can I change it?
The Annual Enrollment Period, October 15 through December 7, with the new plan starting January 1. Outside of it you need a Special Enrollment Period, and simply spending the summer somewhere else is not one — a permanent move out of the service area is. If your coverage did not travel with you this summer, October 15 is the date that matters.