Short answer
Outside your one-time window, switching usually means underwriting.
Medicare.gov says you have a federal right to buy a Medigap policy without medical underwriting during your one-time 6-month Medigap Open Enrollment Period or when you have a guaranteed issue right. Outside those, a different company is allowed to ask medical questions, charge more, or deny you. Medicare.gov adds that your state may give extra rights, so it says to check your State Insurance Department.
Start here
What you actually came to find out
Plain answers first. Sources stay below for checking details.
Can I switch anytime?
Medicare.gov says usually not without underwriting, except in set windows.
When is it guaranteed?
During your 6-month Open Enrollment Period or a guaranteed issue right.
What can the company do?
Outside those, ask health questions, charge more, or deny you.
Any other options?
Medicare.gov says check your State Insurance Department for extra rights.
Open Enrollment
One time, 6 months
Medicare.gov says this window starts when you are 65 or older and have Part B.
Source trail: Medicare.gov
Switching later
Underwriting likely
Medicare.gov says a company can use medical underwriting outside the window.
Source trail: Medicare.gov
Guaranteed issue
Limited rights
Medicare.gov lists specific situations where a company must sell to you.
Source trail: Medicare.gov
State law
May add rights
Medicare.gov says to check your State Insurance Department.
Source trail: Medicare.gov
The real planning question is whether keeping your current Plan G for its guaranteed coverage is worth more than the premium you might save by passing underwriting somewhere cheaper.
Neutral landscape
The shape of the question
Medicare.gov is the main source because it defines the one-time Medigap Open Enrollment Period and what it protects.
Source trail: Medicare.gov
The switching question comes next. Medicare.gov says you usually have no federal right to switch without underwriting once that window closes.
Source trail: Medicare.gov
The exceptions matter, so the official guide lists the guaranteed issue rights that still protect you in limited situations.
Source trail: Medicare.gov
State law is the last layer because Medicare.gov says extra rights may exist and points you to your State Insurance Department.
Source trail: Medicare.gov
Curator core
What the authorities say
These sources are here for the reader who wants to check the work. The plain-English answer stays above them.
Source 01
Medicare.gov
Get Ready to Buy Medigap
Medicare.gov explains the one-time 6-month Medigap Open Enrollment Period, what it guarantees, and what changes once it ends.
Source framing
Medicare.gov says the Medigap Open Enrollment Period is a one-time 6-month window when an insurance company cannot use medical underwriting to deny you or charge more for pre-existing conditions.
Strongest for: the Medigap Open Enrollment Period and what protection it gives
Read at Medicare.govSource 02
Medicare.gov
Can I Change My Medigap Policy?
Medicare.gov explains when you have a federal right to switch Medigap policies and when a new company may use medical underwriting.
Source framing
Medicare.gov says that in most cases you have no federal right to switch Medigap policies unless you are in your Open Enrollment Period or have a guaranteed issue right, and that state law may add protections.
Strongest for: switching Medigap policies and the underwriting rules
Read at Medicare.govSource 03
Medicare.gov
Choosing a Medigap Policy
The official Medicare guide to Medigap, including medical underwriting, guaranteed issue rights, and the situations that protect you.
Source framing
Medicare.gov says that outside the Open Enrollment Period or a guaranteed issue right, an insurance company is allowed to deny you a policy if you do not meet its medical underwriting requirements.
Strongest for: guaranteed issue rights and the official Medigap underwriting rules
Read at Medicare.govPlain-English forks
The forks people face
Most retirement questions hide a few smaller decisions. These are the practical pieces that change the plan.
Are you in your Open Enrollment Period or past it?
Why it matters: Medicare.gov protects the one-time 6-month window, then the rules change.
In real life: This fork decides whether health questions even apply.
What to look at: What to look at: Medicare.gov get-ready-to-buy and the start of your window.
Do you have a guaranteed issue right?
Why it matters: Specific situations require a company to sell to you without underwriting.
In real life: This fork can reopen a no-underwriting door outside the main window.
What to look at: What to look at: the guaranteed issue rights in the official Medigap guide.
Does your state add protection?
Why it matters: Some states give extra switching rights beyond federal law.
In real life: This fork can change the answer entirely depending on where you live.
What to look at: What to look at: your State Insurance Department, as Medicare.gov suggests.
Common questions
Quick answers
Short, plain answers for the questions people usually have next. The source trail stays available below.
Can I switch Medigap companies without answering health questions?+
Medicare.gov says usually not, unless you are in your 6-month Medigap Open Enrollment Period or have a guaranteed issue right.
Is a Plan G with one company the same as a Plan G with another?+
The coverage letter is standardized, but Medicare.gov says switching companies outside a protected window can still require medical underwriting.
What is the Medigap Open Enrollment Period?+
Medicare.gov says it is a one-time 6-month window, starting when you are 65 or older and enrolled in Part B, when a company cannot deny you or charge more for pre-existing conditions.
What are guaranteed issue rights?+
Medicare.gov says these are limited situations where an insurance company must sell you a Medigap policy and cannot charge more for past or present health problems.
Can a company deny me if I apply outside the window?+
Medicare.gov says outside the Open Enrollment Period or a guaranteed issue right, a company is allowed to deny you if you do not meet its medical underwriting requirements.
Could my state let me switch more easily?+
Medicare.gov says you may have additional rights under state law and to check with your State Insurance Department.
How this page is curated
This page uses Medicare.gov get-ready-to-buy, the change-a-Medigap-policy page, and the official Choosing a Medigap Policy guide. It separates the one-time Open Enrollment Period from later switching because Medicare.gov applies different underwriting rules to each.
Read the planner methodologyTrust anchor
Sources used on this page
Every source named above is listed here in one place.
Medicare.gov. Get Ready to Buy Medigap
https://www.medicare.gov/health-drug-plans/medigap/ready-to-buyMedicare.gov. Can I Change My Medigap Policy?
https://www.medicare.gov/health-drug-plans/medigap/ready-to-buy/change-policiesMedicare.gov. Choosing a Medigap Policy
https://www.medicare.gov/publications/02110-choosing-a-medigap-policy.pdf
Before you act on this
This plan is educational. It is not personalized financial, tax, or insurance advice. Projections illustrate the math, they do not predict the future. Talk to your own licensed financial professional before acting on any of it.