Medicare Supplement
Before you compare Plan G quotes, read this
Here is something that trips up a lot of people shopping for a Medicare Supplement in Oklahoma City: a Plan G is a Plan G is a Plan G. The benefits are set by federal law, so the coverage on paper is identical from one insurer to the next. What actually differs is the price, how that price will change over time, and the fine print around signing up. That is where the real comparison happens.
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Your Medigap rate went up. Your benefits didn't.
Medicare supplement benefits are standardized — identical at any carrier. The only difference is what you pay. One call compares current rates in your area.
- Same plan letter = same benefits, by law
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Click to call 855-729-3240Key takeaways
- Every Medigap letter (A, B, D, G, high-deductible G, K, L, M and N) offers the same standardized benefits at every insurer, so comparing the same letter across carriers is an apples-to-apples exercise.
- Insurers price Medigap three different ways — attained-age, issue-age and community-rated — and that choice shapes how your premium behaves as you get older.
- Plans C and F are closed to people who became eligible for Medicare on or after January 1, 2020.
- The Medicare.gov Medigap policy search, the Oklahoma Insurance Department's rate guide and Oklahoma's SHIP can all help you see which insurers sell each letter in your ZIP code.
The plan letter tells you the coverage
Oklahoma City is in Oklahoma County, and like the rest of the state it follows the federal standardization rules for Medicare Supplement Insurance. That means the letters — A, B, D, G, high-deductible G, K, L, M and N — describe the exact same benefits no matter which company sells them. Plans C and F remain available only to people who were eligible for Medicare before January 1, 2020.
So when you are comparing "Plan G at Company 1" against "Plan G at Company 2," you are not comparing benefits. You are comparing price, pricing method, discounts, service and stability.
The three pricing methods, and why they matter
Insurers in Oklahoma can price Medigap policies using one of three methods, and each behaves differently over time:
- Attained-age rated. The premium is based on your current age, so it typically goes up as you get older, on top of any general rate increases.
- Issue-age rated. The premium is based on the age you were when you first bought the policy. It won't rise just because you had a birthday, though it can still rise for other reasons like inflation or claims.
- Community rated (also called no-age rated). Everyone with the same policy from that insurer pays the same base premium regardless of age.
None of these is automatically "better" — the right one depends on how long you plan to hold the policy and how you want to budget. Ask each insurer, in writing, which method they use.
Rate history is the quiet tiebreaker
Two Plan G policies can start at very similar premiums and end up hundreds of dollars apart a few years later. That is because every insurer files rate increases with the state, and some companies raise rates more aggressively than others.
The Oklahoma Insurance Department publishes a Medigap rate guide, and you can also ask the insurer or an agent for the company's rate-increase history over the last five to ten years. A pattern of steady, moderate increases is generally more predictable than a company with big swings.
Household discounts and underwriting
Many Medigap insurers in Oklahoma offer a household discount — sometimes called a spousal or cohabitant discount — for people who live with another adult, and it does not always require both people to buy a policy with the same company. The size of the discount varies, so ask.
Underwriting matters just as much. During your Medigap Open Enrollment Period — the six months that start when you are 65 or older and enrolled in Part B — insurers must sell you any Medigap policy they offer, at their best available rate, regardless of health. Outside that window, most applications in Oklahoma are subject to medical underwriting, and you can be turned down or charged more. There are limited guaranteed-issue situations (for example, if certain coverage you had is ending), so if you are shopping outside your open enrollment window, confirm your rights before you apply.
How to find the insurers selling in your ZIP code
Because the list of insurers filed in Oklahoma changes, the most reliable way to see who is selling which letter in Oklahoma City is to go straight to the sources:
- Medicare.gov Medigap policy search. Enter your ZIP code and it will list the companies with Medigap policies on file for that area, along with the letters each one offers.
- Oklahoma Insurance Department Medigap rate guide. The state publishes a guide that lists licensed Medigap insurers and premium ranges by age.
- Oklahoma SHIP (Senior Health Insurance Counseling Program). Free, unbiased counselors can walk through the list with you and explain the pricing methods each company uses.
The table below lists the standardized plan letters available in Oklahoma. Use it alongside the Medicare.gov search to line up which insurers offer the letter you are considering.
A simple way to compare, side by side
When you have your short list, put the same questions to every insurer for the same plan letter:
1. What pricing method do you use — attained-age, issue-age or community-rated? 2. What have your rate increases looked like over the last five years in Oklahoma? 3. Do you offer a household or spousal discount, and what are the rules? 4. Will I need to answer health questions, and what happens if I switch later? 5. How do I file a claim, and do you use Medicare crossover?
If two policies come back with similar answers and similar prices, the deciding factor often ends up being the insurer's rate stability and customer service.
By the numbers
Medicare Part B premium, 2006–2026
The standard monthly Part B premium has climbed from $88.50 in 2006 to $202.90 in 2026. Hover any point for that year’s premium.
Source: CMS. Standard premium shown; in some hold-harmless years many existing enrollees paid less. Confirm at Medicare.gov.
By the numbers
How people get Medicare in Oklahoma County
(MA penetration in Oklahoma County)
MA penetration from CMS enrollment data; Medigap share is an estimate. U.S. average is about 54% Medicare Advantage. These are area-level figures, not plan-specific.
Who sells Medigap here
Medigap insurers in Oklahoma
Insurers offering Medigap policies in Oklahoma, listed alphabetically. In the Oklahoma City area (ZIP 73102) the Medicare.gov search listed 27 of them. Prices vary by insurer for the same letter and are not shown here.
- AARP - UnitedHealthcare Insurance Company Plans A, B, C, F, G, K, L, N
- AARP - UnitedHealthcare Insurance Company of America Plans A, F, G, N
- Aetna Health Insurance Company Plans A, B, F, F-HD, G, N
- AFLAC Plans A, F, G, N
- American Benefit Life Insurance Company Plans A, F, G, N
- Bankers Fidelity Assurance Company Plans A, F, G
- Bankers Life (Underwritten by Washington National Insurance Company) Plans A, F, G, G-HD, N
- BlueCross BlueShield of Oklahoma Plans A, F, F-HD, G, G-HD, N
- Everence Association Inc. Plans A, F, G, L, N
- Farm Bureau Health Plans - Members Health Insurance Company Plans A, B, C, D, F, G, M, N
- GPM Health and Life Insurance Company Plans A, F, G, N
- Guarantee Trust Life Insurance Company Plans A, F, G, N
- HealthSpring National Health Insurance Company Plans A, F, G, G-HD, N
- Humana (Humana Benefit Plan of Illinois, Inc.) Plans A, F, G, G-HD, N
- Humana Achieve (CompBenefits Insurance Company) Plans A, F, G, G-HD, N
- Insurance Company of North America Plans A, F, G, G-HD, N
- LifeShield National Insurance Company Plans A, F, G, N
- Lumos Insurance Plans A, F, G, G-HD, N
- Mutual of Omaha (Mutual of Omaha Insurance Company) Plans A, F, G, G-HD, N
- New Era Life Insurance Company Plans A, C, F, F-HD, G, G-HD, M, N
- Old Surety Life Insurance Company Plans A, C, F, G
- Physicians Select Insurance Company Plans A, F, G, G-HD
- State Farm Mutual Automobile Insurance Company Plans A, C, D, F, G, N
- United American Insurance Company Plans A, B, C, D, F, F-HD, G, G-HD, K, L, N
- USAA Life Insurance Company Plans A, F, G, N
- Wisconsin Physicians Service Insurance Corporation Plans A, C, F, G, N
- WoodmenLife Plans A, F, G, G-HD, N
Source: Medicare.gov Medigap policy search. No insurer is ranked or recommended.
Medicare Supplement (Medigap)
The Medigap plans you can buy in Oklahoma
Medigap plans are standardized by federal law: a Plan G from one insurer covers the same things as a Plan G from any other. Insurers set their own prices, which are not shown here.
| Plan | What it covers | Open to new enrollees |
|---|---|---|
| Plan A | The basic benefits every Medigap plan includes: Part A hospital coinsurance and up to 365 extra hospital days, Part B coinsurance, the first three pints of blood, Part A hospice coinsurance. | Yes |
| Plan B | Plan A plus the Part A hospital deductible. | Yes |
| Plan C | Plan B plus skilled-nursing coinsurance, the Part B deductible and foreign-travel emergency care. Closed to people newly eligible for Medicare on or after January 1, 2020. | Only if you were eligible before 2020 |
| Plan D | Plan B plus skilled-nursing coinsurance and foreign-travel emergency care (not the Part B deductible). | Yes |
| Plan F | Every standardized benefit, including the Part B deductible and Part B excess charges. Closed to people newly eligible on or after January 1, 2020. A high-deductible version exists. | Only if you were eligible before 2020 |
| Plan G | Every standardized benefit except the Part B deductible (which you pay yourself each year). A high-deductible version (G-HD) pays after you meet a yearly deductible. | Yes |
| Plan K | Pays a share of most cost-sharing (50 percent for several benefits) with a yearly out-of-pocket limit set by federal rules. | Yes |
| Plan L | Like Plan K with a larger share (75 percent) and a lower yearly out-of-pocket limit. | Yes |
| Plan M | Like Plan D but covers half of the Part A hospital deductible. | Yes |
| Plan N | Like Plan G, except a small copayment for some office and emergency-room visits, and it does not cover Part B excess charges. | Yes |
Source: CMS, Medicare Supplement Insurance (Medigap) rules; medicare.gov.
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When can you enroll? An interactive year
Enrollment windows are federal and the same nationwide. Confirm your personal dates at Medicare.gov or 1-800-MEDICARE.
Good to know
Frequently asked questions
Is Plan G better at one insurer than another?
When can I buy a Medigap policy without medical underwriting?
Can I still buy Plan F or Plan C in Oklahoma?
How do I find out which insurers sell Medigap in my Oklahoma City ZIP code?
- Medicare.gov Medigap policy search and state insurance-department rate guides
- CMS — Medicare Supplement Insurance (Medigap) rules (medicare.gov)
For personalized answers, contact Medicare.gov, 1-800-MEDICARE, or your local SHIP.
Also for Oklahoma City
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This page was last updated: September 2026.