Medicare for Snowbirds: Why Medicare Advantage Can Strand You

If you spend significant time in two states each year, your Medicare plan structure matters more than most retirees realize. The wrong choice can leave you paying full price for routine care — or worse, skipping it entirely — while you're away from your primary address.

How Medicare Advantage service areas work

When you enroll in a Medicare Advantage plan, you enroll in a plan that operates in a specific service area defined by CMS — typically a set of counties around your primary address. Insurers must offer you the same network benefits anywhere within that service area.

Outside the service area, CMS requires Medicare Advantage plans to cover two things, and only two things:¹

• Emergency care: Covered at in-network cost-sharing rates, anywhere in the United States. A heart attack in Phoenix is covered the same as one in your home county.
• Urgently needed care: Covered when you are temporarily away and need care that cannot wait until you return. Examples: an ear infection, a minor injury, an acute illness while traveling. Not covered: ongoing chronic disease management, specialist visits, elective procedures, or anything that could reasonably be scheduled when you return home.

Routine care — your cardiologist follow-up, your endocrinology appointment, your physical therapy for a knee replacement — falls into neither category. If you're in your second state and need a specialist you've been seeing for six months, your Medicare Advantage plan typically pays nothing for that visit.

HMO vs. PPO: the snowbird distinction

Plan type matters significantly:

About 54% of Medicare Advantage enrollees are in HMO-type plans,² which have the most restrictive out-of-area rules. If you're a snowbird in an HMO, routine care in your second state requires you to either (a) pay 100% out-of-pocket, (b) delay care until you return home, or (c) argue that your condition qualifies as "urgently needed."

PPO plans are more snowbird-friendly — out-of-network benefits apply to routine care — but at a cost. The 2026 combined in-network + out-of-network out-of-pocket maximum is up to $13,900,³ versus $9,250 in-network-only. A year of heavy out-of-network use can approach or exceed that ceiling.

Some MA plans are designed for snowbirds

A small number of insurers offer "multi-state" or "snowbird" Medicare Advantage plans with expanded service areas covering both your primary state and a common destination state (e.g., a plan that covers Minnesota and Florida, or Ohio and Arizona). These plans exist but are rare, often limited to one insurer in a given market, and typically cost more in premium than a local-only HMO.

If you're enrolled in one of these plans, review the plan's Evidence of Coverage carefully each year. The specific counties covered in your second state and the cost-sharing structure for out-of-area routine care can change at Annual Enrollment Period (October 15 – December 7).

The Medigap Plan G solution for snowbirds

Original Medicare (Parts A and B) covers you with any Medicare-participating provider in the United States — no service area, no network. A physician accepting Medicare assignment in Miami works exactly the same as one in Minneapolis.

The gap in Original Medicare is the cost-sharing: the 20% Part B coinsurance with no out-of-pocket ceiling, and hospital cost-sharing under Part A. Medigap Plan G covers both — you pay only the $283 Part B annual deductible,⁴ then nothing else for covered services regardless of how much care you use or where you receive it.

For snowbirds, this structure eliminates the second-state coverage question entirely. Your neurologist in Naples, Florida is the same as your neurologist in Rochester, Minnesota — as long as both accept Medicare assignment (the overwhelming majority do).

Part D portability

Part D drug coverage works nationally: your formulary doesn't change when you travel. Any pharmacy in your plan's network — which for major Part D carriers includes national chains (CVS, Walgreens, Walmart, etc.) — fills your prescriptions at the same covered rate in any state.

One thing to check: whether your preferred pharmacy in your second state is in-network for your current Part D plan. If your plan's network is regional, you may need to use mail order or switch plans at AEP to one with broader national pharmacy access.

Also: the $2,100 Part D out-of-pocket cap applies regardless of where you fill prescriptions in 2026.⁵

The enrollment address question

For Medicare enrollment purposes, your "permanent residence" is the address you list on your Medicare application — typically your legal domicile, which is the state where you file taxes, register to vote, and maintain your primary legal address.

You do not need to live at that address year-round. Many snowbirds maintain a northern primary address and spend winters elsewhere. Medicare enrollment is based on your permanent legal residence, not where you physically spend the majority of your time during any given season.

What this means practically:

• Your Initial Enrollment Period (IEP) is tied to your birth month, not your state residency pattern.
• If you choose a Medicare Advantage plan, you'll enroll in a plan covering your permanent-residence county — not your second-state county.
• Medigap premiums are set based on where you live when you buy the policy (your primary state), not your second state.

Moving permanently to your second state: Medigap switching rights

If you eventually move full-time to your second state — a common scenario as snowbirds age — you may have Medigap guaranteed issue rights for the new state. The key rules:⁶

• Moving out of a plan's service area: If you relocate and your Medicare Advantage plan no longer covers your new county, you have a guaranteed-issue right to purchase Medigap coverage without medical underwriting. This is a federal GI right that applies nationwide.
• Moving within a Medigap-covered state: If you already have Medigap and move to a new state, your existing policy stays in force (Medigap is not state-bound for existing policyholders). However, you can switch to a new policy in the destination state during AEP — but only if you're within your GI window or your new state has birthday-rule or other state-level protections.
• The one-way-door risk: If you chose Medicare Advantage initially and now want to switch to Medigap after your Medigap Open Enrollment Period (the 6 months starting at age 65 with Part B), you typically face medical underwriting unless a GI event applies. A plan exit due to service area change is one of those events — but only if it's triggered by the plan's coverage ending in your county, not by your voluntary move to a state the plan already covers.

For a full breakdown of GI rights and how the one-way door works, see the Medigap guaranteed issue guide and the Medigap Plan G vs. N vs. HD comparison.

IRMAA doesn't care where you live

If your income exceeds the IRMAA thresholds, you pay Medicare surcharges regardless of your state of residence — or split residence. IRMAA is a federal premium adjustment collected by SSA based on your reported MAGI; it doesn't change when you're in your winter state.

What does change: Medigap premiums vary significantly by state. Plan G premiums in Florida (a high-cost, warm-weather state with a large Medicare population) are often 20–50% higher than premiums in a Midwestern state for an identical beneficiary age. If you're purchasing Medigap initially and have legal flexibility about which state to designate as your primary residence, the cost difference can be meaningful over a 20-year retirement.

For full IRMAA details, see the 2026 IRMAA brackets reference.

Annual cost comparison: MA vs. Medigap for a typical snowbird

Assume a 68-year-old snowbird, single filer, $140,000 MAGI (IRMAA Tier 1), spending November–April in Florida and May–October in their home state:

Illustrative. Part B annual: $202.90 × 12 = $2,435. IRMAA Tier 1 Part B surcharge $81.20/mo = $975/yr; Part D surcharge $14.50/mo = $174/yr. Medigap Plan G premiums vary widely by age, state, insurer, and community/issue-age/attained-age pricing. MA plan premiums and benefit designs vary by county and insurer. Not actual plan quotes. Source: CMS 2026 Medicare Part B Fact Sheet.⁴

The key asymmetry: Medigap Plan G has a higher predictable premium, but routine care in both states is covered. The MA HMO has a lower (or zero) premium, but routine care in the second state is entirely uncovered — and the 6-month exposure can exceed the entire Medigap premium advantage if you have any meaningful health needs.

Interactive cost estimator

Use this estimator to compare estimated annual Medicare costs for your snowbird situation:

Questions a Medicare-specialist advisor helps snowbirds answer

• Which plan type (HMO, PPO, or Medigap G) minimizes my total cost given my health, income tier, and how much time I spend in each state?
• Are there multi-state MA plans in my home county that cover my second-state area — and are they competitive with Medigap on premium?
• If I want to switch from MA to Medigap, do I have any guaranteed-issue windows coming up, and how do I time the move?
• My Medigap premium is attained-age — what are the 10- and 20-year premium trajectory differences between my home state and my winter state?
• My IRMAA tier changes my Part B cost but not my plan structure — how does my income management strategy interact with my plan choice?

Sources

1. Medicare.gov — Urgently Needed Care Coverage. Medicare Advantage plans must cover urgently needed care when you are temporarily outside your plan's service area. Routine care outside the service area is not covered unless the plan's Evidence of Coverage explicitly extends benefits to out-of-area settings.
2. KFF — Medicare Advantage in 2025: Premiums, Out-of-Pocket Limits, Supplemental Benefits, and Prior Authorization. Plan type enrollment distribution (HMO ~54%, PPO ~45% of MA enrollees). Plan type mix and enrollment trends in Medicare Advantage.
3. CMS — Contract Year 2026 Policy and Technical Changes to the Medicare Advantage Program (Final Rule). 2026 MA in-network OOP limit: $9,250; combined in-network + out-of-network limit: $13,900.
4. CMS — 2026 Medicare Parts B Premiums and Deductibles (Fact Sheet). Part B standard premium: $202.90/mo. Part B annual deductible: $283. Full IRMAA surcharge schedule by tier for Part B and Part D. Published November 14, 2025.
5. CMS — Final CY 2026 Part D Redesign Program Instructions. 2026 Part D out-of-pocket cap: $2,100. Applies to all Part D plans regardless of where prescriptions are filled within the United States.
6. Medicare.gov — Guaranteed Issue Rights. Federal circumstances under which you have the right to purchase Medigap without medical underwriting, including plan termination and involuntary loss of coverage within service area.

Medicare Advantage coverage rules verified against CMS Final Rule CY 2026 and medicare.gov. IRMAA surcharges verified against CMS 2026 Medicare Part B Fact Sheet (November 2025). Part B premium $202.90/mo, Part B deductible $283, Part D OOP cap $2,100, MA in-network OOP max $9,250 all verified for 2026. Calculator estimates are illustrative; actual costs depend on plan selection, utilization, and state. Values current as of June 2026.