
Medicare Supplement Open Enrollment Period 2023 is a crucial time for seniors to secure their healthcare coverage. This annual event typically runs from January 1 to March 31, but it's essential to know the eligibility criteria to make the most of it.
To be eligible, you must have Medicare Part A and Part B, and you can enroll in a Medicare Supplement (Medigap) plan during this period without medical underwriting. This means your insurance company can't deny you coverage or charge you more based on your health status.
The Open Enrollment Period is the only time you can enroll in a Medigap plan without medical underwriting. If you miss this window, you'll need to apply for coverage, and the insurance company may reject your application or charge you more.
For your interest: Medicare Supplement Underwriting
Medicare Supplement Open Enrollment Period 2023
The Medicare Supplement Open Enrollment Period is a six-month window that starts on the first day of the month you turn 65 or older and enroll in Medicare Part B.
This period is crucial because it allows you to buy any Medigap plan offered in your service area with guaranteed issue.
What Is the Period?
The Period is a six-month window of opportunity to secure a Medicare Supplement plan with guaranteed issue. This timeframe is a crucial aspect of the Medicare Supplement Open Enrollment Period.
It starts on the first day of the month when you turn 65 or older and are enrolled in Medicare Part B. This means you'll have a full six months to explore and select a Medigap plan offered in your area.
During this period, you can buy any Medigap plan available in your service area without worrying about pre-existing conditions or medical underwriting. This is a significant advantage, as it allows you to choose the best plan for your needs without any restrictions.
Discover more: Medigap Policies
When Does It Occur?
The Medicare Supplement Open Enrollment Period is a crucial time for seniors to secure their coverage. It's a 7-month window around your 65th birthday that starts three months before your birthday month and ends three months after.
If your birthday is on May 12, your IEP runs from February 1 to August 31. This is the primary time when you can enroll in Parts A and B of Original Medicare and any other Medicare-related plans.
During this time, you'll have guaranteed issue rights to any Medicare supplement you want. You can choose any of the ten plans and any insurance company you want, and you are guaranteed access to that plan.
The exception to this is Plan F, which limits enrollment to those who turned 65 before January 1, 2020. This means if you're eligible for Plan F, you can enroll in it, but if you're turning 65 after that date, you won't be able to.
You won't need to pass medical underwriting during this time, and the insurance carrier can't charge you higher premiums due to your health history. This is a significant advantage, as it ensures you can get the coverage you need without worrying about your medical history.
This guaranteed issue period also applies to individuals who postpone Medicare enrollment. For example, if you're working past the age of 65 and stay on your employer-sponsored plan, you'll have guaranteed issue rights to a Medicare supplement when you lose your employer coverage.
A different take: What Time Does in and Out Open?
Eligibility and Enrollment
To be eligible for Medicare Supplement, you generally need to be enrolled in Original Medicare, Part A and Part B.
You can buy a Medigap policy if you're enrolled in Original Medicare (including Part A and Part B). You can't buy a Medicare Supplement plan if you're enrolled in Medicare Advantage.
If you're under 65 and have Medicare because of a disability or End-Stage Renal Disease (ESRD), your eligibility and Medigap options will depend on your specific state. Some states offer certain Medigap plans to beneficiaries under 65 with disabilities or certain conditions.
You can purchase a Medigap policy during your Medigap Open Enrollment Period, which is typically the 6-month period that starts the month you turn 65 or enroll in Part B. However, if you're under 65 and have Medicare due to a disability, your enrollment options may be different.
Here are the key eligibility and enrollment facts to keep in mind:
- You're generally eligible for Medigap coverage if you're enrolled in Original Medicare, Part A and Part B.
- You can buy a Medigap policy if you're enrolled in Original Medicare (including Part A and Part B).
- You can't buy a Medicare Supplement plan if you're enrolled in Medicare Advantage.
- Some states offer certain Medigap plans to beneficiaries under 65 with disabilities or certain conditions.
Medigap Plans and Options
Medigap plans are designed to help fill the gaps in original Medicare coverage. There are several plans to choose from, but each letter plan offers the same coverage, no matter which insurance company you buy from.
Our family has been helping seniors understand their Medicare benefits for 40 years, and we can guide you through the process of choosing the best plan for your unique situation. Our service is always 100% free to you!
To get started, compare different Medigap plans and choose your plan carefully, as you may not be able to switch plans easily in the future. Use the Medicare.gov Medigap policy finder to discover which plans are sold in your ZIP code and sort the results by monthly premium, company name, or pricing type.
Here's a breakdown of the Medigap plan requirements during open enrollment:
If you miss open enrollment, you could face higher premiums, a coverage waiting period for preexisting conditions, or be denied a plan altogether. However, there are special situations that allow you to purchase or switch Medigap plans later without these drawbacks, such as buying coverage before age 65 if you're Medicare-eligible due to disability or end-stage renal disease (ESRD).
State-Specific Information
Some states have their own rules around Medicare supplement enrollment without medical underwriting. This means that if you live in one of these states, you may have more flexibility when choosing a Medicare supplement plan.
A handful of states offer additional Medicare Supplement open enrollment periods, which differ from the national policy. These state-based open enrollment periods are on a guaranteed issue basis, meaning the insurance carrier must issue you the policy without reviewing your health history.
In some states, you can only switch plans if you already have one, while others allow you to sign up for a Medigap plan without existing coverage. This is an important consideration when choosing a Medicare supplement plan, as it can affect your options and costs.
For more insights, see: How Does Medicare Supplement Work
State-Based Periods
Some states have their own rules around Medicare supplement enrollment, which can make a big difference for you.
A handful of states offer additional Medicare Supplement open enrollment periods, which are on a guaranteed issue basis. This means the insurance carrier must issue you the policy without reviewing your health history.
You can switch plans during these state-based open enrollment periods, but the rules vary by state. Some states only allow you to switch if you already have a Medicare Supplement plan, while others let you sign up for a new plan without existing coverage.
These state-based open enrollment periods are usually on a guaranteed issue basis, which means the insurance carrier can't institute a waiting period.
Year-Round States
If you're looking for year-round open enrollment states, you're in luck. Five states allow you to enroll in a Medicare supplement without underwriting at any time of the year, regardless of your age.
New York is one of these states, where you can buy a Medigap policy at any time, depending on your situation. You might still have a waivable six-month waiting period.
In Maine, insurers each set a one-month open enrollment period to offer Plan A, so if you qualify and want to enroll, you can do so.
Washington is another state that allows you to switch your Medicare Supplement enrollment year-round if you already have a Medigap plan.
A fresh viewpoint: Does My Medicare Supplement Plan Automatically Renew
Maine Annual
In Maine, the annual open enrollment period is a one-month window where any applicant can be accepted into a Medicare Supplement Plan A. This period is required for all insurers in the state.
During this time, insurers are not required to offer the popular Plan G and Plan N, which are often sought after by Medicare beneficiaries.
The annual open enrollment period is a crucial time for Mainers to explore their Medicare options and find the best plan for their needs.
Additional reading: Do Medicare Supplement Plans Cover Annual Physicals
Buying and Switching Plans
During Medicare Supplement open enrollment, you can sign up for any plan available in your state. Private insurance companies sell these plans.
You can switch to a different Medigap plan with equal or lesser value after your annual birthday date, but you can't switch to a plan with additional benefits that costs more.
The Medicare Supplement open enrollment period is a great time to review your current plan and make changes if needed. However, if you miss this period, you may face higher premiums, a coverage waiting period for preexisting conditions, or even be denied a plan altogether.
Here are the key requirements for Medigap plans during open enrollment:
- Guaranteed issue: Insurers must accept your application.
- No preexisting condition penalties: You won't pay more or face waiting periods.
- Renewability: You must be able to renew the policy, no matter your health.
- Provider access: You can see any doctor who accepts Medicare.
Plan Changes
If you already have a Medigap plan, you can switch to another one with equal or lesser value after your annual birthday date. This is known as a birthday-rule open enrollment period.
In Maryland, this period begins on your birthday and continues for 30 days after. California offers a similar situation with a 60-day period.
You can't switch to a plan with additional benefits that costs more, so be sure to choose a plan with the coverage you need.
It's also possible to switch your Medigap policy and still benefit from guaranteed issue in some situations. Check with your state's insurance department to learn more.
Most Medigap plan changes rely on meeting very specific time windows, so act quickly.
If you're healthy and can pass medical underwriting, you could also switch to a new policy.
Here are some key dates to keep in mind:
Keep in mind that these dates may be subject to change, so be sure to check with your state's insurance department for the most up-to-date information.
Buying a Plan

You can start the process of Medigap plan shopping right away, or even before the Medicare Supplement open enrollment period, to prevent feeling hurried.
To compare different Medigap plans, remember that each letter plan offers the same coverage, no matter which insurance company you buy from.
You can use the Medicare.gov Medigap policy finder to discover which plans are sold in your ZIP code. The tool allows you to sort the results by monthly premium (low to high), company name, or pricing type.
Collect information on prices and the insurance company's contact information.
Call at least three insurance companies for Medicare quotes, as prices may vary, even though plan healthcare coverage is the same.
Make sure to read the policy before you buy, or you can work with your state’s SHIP representative or a licensed insurance agent recommended to you by friends and family.
Here are the steps to fill out the insurance company’s application:
- Plan choice
- Your name
- Medicare number
- Medicare effective dates for Part A and Part B
- Address, phone number, and email
- Race and ethnicity
- Other coverage information
- Billing options
- Authorization for use and disclosure of health information
You may need to provide a photocopy of a valid state driver’s license or identification card and a current utility bill with your name and address.
Switching Between Original and Advantage
Switching Between Original and Advantage can be a bit of a hassle, but it's doable. If you're in an original Medicare plan and you want to switch to a Medicare Advantage plan, make sure your providers participate in the Advantage plan's network, or you might end up paying more or having no coverage outside the network.
You'll also have to deal with more hoops to jump through to get the care you want, such as prior authorization for some services and needing a referral to see specialists.
Switching from a Medicare Advantage plan back to original Medicare gives you more freedom to choose your providers and a stand-alone Part D plan. You'll just need to pay a separate premium for Part D.
Medigap, or supplemental insurance, can help with Medicare deductibles and copayments, but it's not part of annual open enrollment. You can buy a Medigap policy at any time of the year, but insurers in most states can reject you or charge more for preexisting conditions if more than six months have passed since you signed up for Medicare Part B.
Consider reading: Medicare Part C vs Medigap
Frequently Asked Questions
Can you add Medicare Supplement plans at any time?
Yes, you can add a Medicare Supplement plan at any time, as long as you're enrolled in Original Medicare. There's no enrollment period restriction, making it easy to get the coverage you need.
Sources
- https://www.humana.com/medicare/medicare-resources/medicare-open-enrollment
- https://www.ehealthinsurance.com/medicare/enrollment/medicare-supplement-enrollment/
- https://themedicarefamily.com/medicare-supplements/medicare-supplement-enrollment-periods/
- https://www.investopedia.com/medicare-supplement-open-enrollment-what-to-know-8706564
- https://www.aarp.org/health/medicare-insurance/info-2022/open-enrollment.html
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