Networks & Providers
Service Area
Quick answer
A service area is the geographic region — usually defined by county — where a Medicare Advantage or Part D plan operates. To enroll, you must live in the plan's service area.
Plain-English definition
Moving out of the service area triggers a SEP to change plans.
Why it matters
Service areas define which plans are available to you.
A simple example
You compare plans that operate in your ZIP by county.
Common mistakes & misconceptions
Related terms
SEP for Moving
Moving out of your plan's service area triggers a Special Enrollment Period to switch to a plan in your new location, usually for up to 2 months after your move.
Special Enrollment Period (SEP)
A Special Enrollment Period (SEP) is a window outside the standard windows when you can join, switch, or drop a plan. SEPs are triggered by qualifying life events like moving, losing employer coverage, or becoming eligible for Medicaid.
Medicare Advantage (Part C)
Medicare Advantage, also called Part C, is a way to receive your Medicare benefits through a private insurance plan approved by Medicare. Plans bundle Part A and Part B, usually include Part D drug coverage, and often add dental, vision, and hearing.
Frequently asked questions
Can I keep a plan if I move?+
Only if you're still in its service area.
Sources & references
📚 Where this information comes from
- Medicare.gov — official U.S. government site for people with Medicare ↗Primary source for benefits, enrollment periods, and plan comparison.
- CMS.gov — Centers for Medicare & Medicaid Services ↗Federal rulemaking, program updates, and official guidance.
- Social Security Administration — Medicare enrollment & premiums ↗Enrollment, premium withholding, and IRMAA determinations.
When you're ready, compare plans on your own terms
See Medicare Advantage plans from the insurance companies we represent, or walk the course with a licensed agent whenever you'd like a second set of eyes.
We help compare Medicare Advantage plans from the insurance companies we represent, and we don't offer every plan available in your area.
Medicare Caddies is an independent insurance agency. We are not affiliated with, endorsed by, or connected to the U.S. government, the federal Medicare program, or the Centers for Medicare & Medicaid Services (CMS). We help compare Medicare Advantage plans from the insurance companies we represent, and we don't offer every plan available in your area.