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Health insurance and Medicare for full-time RVers: which address counts

Your mail can go to South Dakota, Texas or Florida while you spend the year somewhere else. Health coverage works differently: most plans are sold for one area and built around local doctors. This page sets out what federal rules and the official HealthCare.gov and Medicare.gov pages say about your address, and how far from “home” you can travel before a plan has to drop you. Checked 4 Nov 2026. It is not legal, tax or insurance advice, and we don’t list or rank plans or prices.

New to RV mail? RVers start here: the step-by-step checklist.

The short version. Your mailing address and your residence are two separate fields. Plans use your residence to decide whether you can join. Original Medicare works with any doctor or hospital that takes Medicare anywhere in the U.S. Medicare Advantage and Part D plans are sold by service area, and they generally have to drop you after 6 months (Medicare Advantage) or 12 months (Part D) away from it. Marketplace HMO and EPO plans generally cover only in-network care except emergencies. Returned mail can count as evidence that you’re away, so keep your forwarder address current everywhere.

Enrollment windows open right now (checked 4 Nov 2026). Marketplace Open Enrollment runs Nov 1 to Jan 15; enroll by Dec 15 for coverage starting Jan 1 (HealthCare.gov). The Medicare Annual Election Period runs Oct 15 to Dec 7, with changes effective Jan 1 (CMS enrollment guidance).

Residence vs mailing address

Health plans, like the DMV, ask where you live and separately where to send mail. For full-timers they are often different, and that’s allowed:

Medicare Advantage and Part D. CMS guidance for 2026 says you can join a plan if you permanently reside in its service area. If your mailing address is somewhere else, the plan “should make every effort to accommodate” it and send notices there. But “use of an alternate mailing address does not eliminate or change the requirement of residency,” so the plan still decides where you live.
Proof plans may ask for. When your mailing address isn’t your permanent residence, a plan may ask for voter registration records, driver license records (“where such records accurately establish current residence”), tax records or utility bills (CMS guidance, section 20.3). This is one more reason to keep your license, voter registration and IRS address in the same domicile state.
P.O. box as residence. If you list a post office box as your residence, CMS treats the enrollment request as incomplete, and the plan must check where you physically live. If residence is disputed, the plan looks to your state’s law. The guidance doesn’t mention private mailboxes at mail forwarding companies by name.
Marketplace (HealthCare.gov) plans. The federal rule (45 CFR 155.305) says your Exchange is the one for the area where you are living and intend to reside, “including without a fixed address.” It also says the Exchange can’t deny or end your eligibility because of a temporary absence if you intend to return.

Medicare on the road

Original Medicare (Parts A and B)

Medicare.gov says that with Original Medicare, “you can use any doctor or hospital that takes Medicare, anywhere in the U.S.” That includes the 50 states, D.C., Puerto Rico and the U.S. territories. You may pay more if a doctor doesn’t accept assignment. Original Medicare generally doesn’t cover care outside the U.S. (Medicare.gov compare page, checked 4 Nov 2026). For people who move around all year, this is the option with no service area.

Medicare Advantage (Part C)

Medicare Advantage plans are approved for a service area, which for local plans is one or more counties (42 CFR 422.2). Medicare.gov says you may need to use doctors in the plan’s network and service area for non-emergency care, and some plans cover out-of-network care at a higher cost. The rules that matter on the road:

The 6-month rule. If you haven’t moved but have been out of the service area for more than 6 months, the plan must disenroll you (42 CFR 422.74(d)(4)(ii)).
Visitor/traveler benefits. A plan may offer a visitor or traveler benefit that lets you stay enrolled while out of the area but inside the U.S. for up to 12 consecutive months. You’re disenrolled on the first day of the 13th month. Plans can limit this to certain areas and providers (42 CFR 422.74(d)(4)(iii); CMS guidance 60.2.1.2.1). Ask a plan whether it has one, and where it applies, before you join.
Returned mail counts. Under the same rule, you’re considered temporarily absent when required plan mail is returned by USPS as undeliverable without a forwarding address. CMS also lists an expired USPS forwarding order as one reason mail comes back. A forwarder address you keep current, and give to the plan, avoids this.
Moving. If you move to a new address outside your plan’s service area, Medicare.gov says you can switch plans or go back to Original Medicare. The window starts when you move (or the month before, if you tell the plan first) and runs for 2 full months after. If you don’t pick a new plan, you’re put in Original Medicare when the old plan drops you.

Part D drug plans

Stand-alone drug plans also have service areas. A plan sponsor must disenroll you if you no longer live in its service area (42 CFR 423.44), and CMS guidance says it must disenroll you if you’re away for more than 12 consecutive months, effective the first day of the 13th month. For getting refills while traveling, see RV packages and prescriptions on the road.

Your Medicare address lives at Social Security

The CMS enrollment guidance tells plans that locate a member after returned mail to advise them to update their address with Social Security: through a my Social Security account at ssa.gov, by calling 1-800-772-1213 (TTY 1-800-325-0778, weekdays 8 a.m. to 7 p.m. local time), or at a local field office. Do this when you set up your forwarder.

Marketplace plans (under 65)

Who can use it. HealthCare.gov says you must live in the U.S., be a citizen, national or lawfully present, and not be incarcerated. If you have Medicare, you can’t enroll in a Marketplace health or dental plan.
Networks are the catch. HealthCare.gov describes an EPO as covering services only in the plan’s network, except emergencies, and an HMO as generally not covering out-of-network care except emergencies; an HMO “may require you to live or work in its service area.” A PPO lets you use out-of-network providers without a referral at extra cost. If you’ll spend months far from your domicile state, check each plan’s network type and out-of-network rules before you pick.
Changing plans after a move. Outside Open Enrollment you need a Special Enrollment Period, and moving is one qualifying event. Under 45 CFR 155.420(d)(7), the moving SEP applies when a permanent move gives you access to new plans and you had qualifying coverage for at least one day in the 60 days before the move.
Outside the U.S. HealthCare.gov says Marketplace insurance covers care from providers within the U.S.

Practical steps for full-timers

Use the same domicile everywhere. License, voter registration, IRS and health plan records that all point to one state make residence questions easier. Start with the SD vs Texas vs Florida domicile guide.
Put your forwarder in the mailing-address field on every health and Medicare form, and update Social Security too.
Pick a forwarder schedule that fits plan deadlines. Enrollment and disenrollment notices have dates on them. Weekly or on-demand shipping, or mail scanning, helps. The RV mail forwarding comparison lists each service’s shipping options and scan pricing.
Ask someone local. For Medicare questions, a State Health Insurance Assistance Program (SHIP) counselor in your domicile state can help. For Marketplace questions, HealthCare.gov lists 1-800-318-2596 and a Find Local Help tool.

Quick answers

Can I use my mail forwarding address for Medicare Advantage?

As a mailing address, yes; CMS tells plans to accommodate a separate mailing address. Whether it works as your residence is up to the plan, which can ask for records like your license or voter registration, and looks to your state’s law if there’s a dispute.

I travel all year. Which Medicare option fits best?

We can’t pick for you. The structural difference is that Original Medicare has no service area and works with providers nationwide who take Medicare, while Medicare Advantage and Part D plans have service areas and the 6- and 12-month absence limits above.

Does a Marketplace plan cover me in other states?

It depends on the network type. HMO and EPO plans generally cover only in-network care except emergencies. PPOs cover out-of-network care at a higher cost. Check the plan’s documents before you enroll.

More RV guides

RVers start here IRS mail, refunds and banks SD vs Texas vs Florida domicile

Sources checked 4 Nov 2026

Reviewed 2026-11-04.