
Written by Leonie Dennis
HealthCare Writer
We aim to help you make informed healthcare decisions. While this post may contain links to lead generation forms, this won’t influence our writing. We follow strict editorial standards to give you the most accurate and unbiased information.
What You Need to Know
- Medicare Supplement plans, also known as Medigap, help pay for out-of-pocket costs not covered by Medicare Part A and Part B.
- Oklahoma insurance companies must accept your Medicare Supplement (Medigap) plan application if you’re in your Medigap Open Enrollment Period or have guaranteed issue rights.
- The three most popular Medigap policies are typically Plans F, G, and N.
What Are Medicare Supplement Plans in Oklahoma?
Medicare is a federal health insurance program for individuals aged 65 and older, as well as younger people with qualifying disabilities or health conditions (e.g., end-stage renal disease).
Original Medicare includes Part A (Hospital Insurance) and Part B (Medical Insurance). While it covers many medical services, it still leaves you responsible for certain out-of-pocket costs like deductibles, coinsurance, and copayments.
Medicare Supplement plans help pay for these expenses.
Medigap plans in Oklahoma are standardized by letter (A through N), meaning the benefits of each lettered plan are the same across all insurers. However, premiums may vary depending on the company.
Learn how these plans work and how they benefit residents of Oklahoma.
Compare options HERE & start your health plan journey.
When Can You Enroll in a Medicare Supplement (Medigap) Policy?
You can apply for a Medigap plan at any time. However, outside of your Medigap Open Enrollment Period—or without guaranteed issue rights—insurance companies can review your health history and may deny your application or charge more.
Your Medigap Open Enrollment Period lasts for six months and begins the month you are both 65 or older and enrolled in Medicare Part B. During this time, insurers must offer you any Medigap plan they sell at standard rates, regardless of your health status.
Guaranteed issue rights apply in specific situations, such as losing other health coverage. These rights protect you from medical underwriting and allow you to enroll without paying more or being denied due to health conditions.
Switching Plans: Effective 9/1/2023, individuals with continuous Medicare supplement coverage (no gap over 90 days) may switch to a plan of equal or lesser benefits from any carrier on a guaranteed issue basis.
What Are the Most Popular Medicare Supplement Plans?
Nationwide and in Oklahoma, the most popular Medigap plans are:
- Plan F – Offers the most comprehensive benefits but is only available to individuals who became eligible for Medicare before January 1, 2020.
- Plan G – Provides similar coverage to Plan F but does not cover the Medicare Part B deductible.
- Plan N – Covers most major expenses but includes copayments for some doctor and emergency room visits and does not cover Part B excess charges.
These plans are favored for their ability to significantly reduce or eliminate out-of-pocket costs.
Compare options HERE & start your health plan journey.
How Do You Choose a Medicare Supplement Plan?
To choose the right Medigap plan in Oklahoma:
- Assess your healthcare needs and how often you visit doctors or specialists.
- Think about whether you need coverage for skilled nursing facilities or emergency care abroad.
- Compare the same plan letter (e.g., Plan G) across different insurers since benefits are standardized, but prices can vary based on:
- Attained age: Premiums rise as you age.
- Issue age: Premiums are based on your age when you first buy the plan.
- Community rating: Everyone pays the same premium regardless of age.
You can shop plans online or speak with a licensed insurance agent to find the right fit.
How Much Do Medigap Policies Cost?
Medigap premiums in Oklahoma vary based on several factors, including:
- Your age and gender
- Whether you use tobacco
- The plan letter you choose
- The pricing method used by the insurance company
While benefits for each plan letter are standardized, it’s important to compare premium rates from multiple insurers.
What If You Want to Change Your Medicare Supplement Plan?
You can apply to change your Medigap policy at any time. However, if you’re outside of your Medigap Open Enrollment Period and don’t qualify for guaranteed issue rights, your application may be subject to medical underwriting. This means the insurer can deny coverage or increase your premium based on your health.
If you do switch plans, you typically have a 30-day “free look period” during which you can decide whether to keep the new plan. You should not cancel your existing policy until the new one is in effect.
What Are Alternatives to Medicare Supplement Plans?
Medicare Advantage plans, also known as Part C, are an alternative to Original Medicare. These plans are offered by private insurance companies and typically bundle:
Medicare Advantage plans may also offer additional benefits such as dental, vision, hearing, and fitness programs.
If you want an all-in-one solution that includes drug coverage and extra benefits, a Medicare Advantage plan may be a good alternative to Medigap.
Learn more about Oklahoma Medicare Advantage plans.
Medicare Part D?
Medicare Part D plans provide standalone prescription drug coverage.
- Who needs it: Individuals with Original Medicare (Parts A and/or B) who want prescription drug coverage.
- What it covers: Prescription medications; coverage and costs vary by plan.
- How it’s offered: Through private Medicare-approved insurers.
- Not needed if: You have a Medicare Advantage plan that includes drug coverage (MAPD).
Shop for a Medicare plan with additional benefits!
Do Medigap Plans Cover Prescription Drugs?
No. Medigap plans do not include coverage for prescription drugs. If you need drug coverage, you’ll need to enroll in a separate Medicare Part D plan.
Medicare Resources in Oklahoma
Oklahoma residents can receive free help and information through:
- State Health Insurance Assistance Program (SHIP) – Provides one-on-one counseling for Medicare beneficiaries.
- Oklahoma Insurance Department (OID) – Regulates insurance carriers and handles consumer complaints.
- Oklahoma Medicaid Program – Assists low-income residents and coordinates with Medicare for those who qualify for both programs.
- Extra Help Program (Social Security) – Offers financial assistance for Part D drug plan costs for qualifying individuals.
Next Steps
If a Medicare Supplement plan in Oklahoma sounds like a good fit for your needs, the next step is to compare available plans in your area. You can shop online or work with a licensed insurance agent for personalized assistance and support.



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Oklahoma Rehabilitation Services. “Chapter 5: Health and Mental Health Section 1: Medicare.” okdrs.org (accessed August 31, 2020).
“Choosing a Medigap Policy: A Guide to Health Insurance for People With Medicare.”
The State of Medicare Supplement Coverage. ahip.org. Accessed October 19, 2021.
Oklahoma Insurance Department. “Supplemental Insurance.” oid.ok.gov (accessed August 31, 2020).
Oklahoma Insurance Department. “Title 365. Insurance Department Chapter 10. Life, Accident And Health Subchapter 5. Minimum Standards; Contract Guidelines Part 13. Medicare Supplement Insurance Minimum Standards.” oid.ok.gov (accessed August 31, 2020).
U.S. Government Website for Medicare. “Supplement Insurance (Medigap) Plans in Oklahoma.” medicare.gov (accessed October 19, 2021).
U.S. Government Website for Medicare. “Part B Costs.” medicare.gov (accessed August 31, 2020).
National Association of Insurance Commissioners. “2018 Medicare Supplement Loss Ratios.” naic.org (accessed August 31, 2020).
“Chapter 5: Health and Mental Health Section 1: Medicare.”
“Choosing a Medigap Policy: A Guide to Health Insurance for People With Medicare.”
Kaiser Family Foundation. “Total Number of Medicare Beneficiaries.” kff.org (accessed October 19, 2021).
“Choosing a Medigap Policy: A Guide to Health Insurance for People With Medicare.”