Medicare Supplement
Same Plan G, different insurers: how to compare Medigap in Rancho Cucamonga
If you live in Rancho Cucamonga and you are shopping for a Medicare Supplement policy, you may have already noticed something confusing: the same "Plan G" is sold by more than a dozen different insurance companies, and each one charges a different amount. The coverage is identical. The company behind it is not. Here is how to line them up side by side so the choice makes sense.
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Your Medigap rate went up. Your benefits didn't.
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- Same plan letter = same benefits, by law
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Speak to a Licensed Insurance Agent
Click to call 855-729-3240Key takeaways
- In California, every Medigap policy with the same letter (Plan G, Plan N, and so on) covers the exact same things, no matter which insurer sells it.
- Insurers set premiums using one of three methods — attained-age, issue-age or community rating — and that choice affects how your premium changes over time.
- Ask each insurer about rate-increase history, household or spousal discounts, and whether medical underwriting applies to you before you sign anything.
- Use the Medicare.gov Medigap policy search and the California Department of Insurance rate guide to find every insurer selling in your ZIP code.
Why the same letter means the same coverage
Medigap plans are standardized by federal law. That means a Plan G sold by one company in Rancho Cucamonga pays the same Medicare cost-sharing as a Plan G sold by any other company. The benefits do not change based on the logo on the card.
What does change: the premium, the way that premium is calculated, the customer service, and any extras the insurer bundles in (like a gym program or dental discount). So when you compare, you are really comparing price and company — not coverage.
People who are newly eligible for Medicare today can choose from Plans A, B, D, G, high-deductible G, K, L, M and N. Plans C and F are only available to people who were eligible for Medicare before January 1, 2020.
Who sells Medigap in California
Rancho Cucamonga is in San Bernardino County, and California allows a long list of insurers to sell standardized Medigap policies statewide. The table below lists every insurer and the plan letters each one offers. Familiar names include AARP - UnitedHealthcare Insurance Company, AFLAC, Anthem BlueCross - California, Blue Shield of California Life & Health Insurance Company, Humana, Mutual of Omaha (United World Life Insurance Company), State Farm Mutual Automobile Insurance Company and USAA Life Insurance Company — along with several others.
Not every insurer sells every letter. If you have your heart set on Plan N, for example, most listed carriers offer it; if you want high-deductible Plan G, the field is smaller.
The three pricing methods — and why they matter
This is the single most useful thing to understand before you call an agent.
Attained-age rated. Your premium is based on your current age and goes up as you get older. It usually starts lower at 65 and climbs each year. Most California Medigap policies use this method.
Issue-age rated. Your premium is based on the age you were when you bought the policy. It does not go up because you are getting older — though it can still rise for inflation or other reasons.
Community rated. Everyone with the same policy in the same area pays the same premium, no matter their age. Your premium does not go up just because you had a birthday.
None of these is "best." An attained-age policy may look attractive at 65 and feel expensive at 80. An issue-age or community-rated policy may cost more up front but be steadier later. Ask each insurer, in writing, which method they use.
Rate history, discounts and underwriting
Three more questions belong on every call:
What is the rate-increase history? California's Department of Insurance publishes a Medicare Supplement rate guide that shows how much each company has raised premiums in recent years. A company with modest, predictable increases can be worth a closer look than one with a big jump every couple of years.
Is there a household or spousal discount? Some insurers reduce the premium if a spouse or another adult in the home also has a policy — or sometimes just lives with you. The discount amount and the rules vary by company.
Will I need to answer health questions? During your six-month Medigap open enrollment window (which starts when you are 65 and enrolled in Part B), insurers in California must sell you any plan they offer, at their best rate, regardless of your health. Outside that window, most insurers can use medical underwriting — meaning they can charge more or turn you down based on your health history. California also has a "birthday rule" that lets current Medigap enrollees switch to an equal or lesser plan each year around their birthday without underwriting.
How to actually compare, step by step
1. Go to medicare.gov and use the Medigap policy search. Enter your Rancho Cucamonga ZIP code and pick the plan letter you want. You will see every insurer selling that letter in your area. 2. Pull the current California Medicare Supplement rate guide from the state Department of Insurance website. Look up each insurer's rate history. 3. Call two or three insurers (or an independent agent who represents several) and ask the same set of questions: pricing method, recent rate increases, household discount, underwriting rules for your situation. 4. Compare the answers side by side. Because the coverage is identical, the only real differences are price today, likely price later, and how the company treats customers.
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 San Bernardino County
(MA penetration in San Bernardino 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 California
Insurers offering Medigap policies in California, listed alphabetically. 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
- AFLAC Plans A, F, G, N
- American Retirement Life Insurance Company (CIGNA) Plans A, F, G, G-HD, N
- Anthem BlueCross - California Plans A, F, G, N
- Bankers Life (Underwritten by Washington National Insurance Company) Plans A, F, G, G-HD, N
- Blue Shield of California Life & Health Insurance Company Plans A, F, G, N
- Continental Life Insurance Company of Brentwood, Tennessee (Aetna) Plans A, B, F, F-HD, G, N
- Everence Association Inc. Plans A, F, G, N
- Humana (Humana Insurance Company) Plans A, B, C, F, F-HD, G, G-HD, K, L, N
- Insurance Company of North America Plans A, F, G, G-HD, N
- Lumos Insurance Plans A, F, G, N
- Mutual of Omaha (United World Life Insurance Company) Plans A, F, G, G-HD, N
- 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
Source: Medicare.gov Medigap policy search. No insurer is ranked or recommended.
Medicare Supplement (Medigap)
The Medigap plans you can buy in California
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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Good to know
Frequently asked questions
Is Plan G better at one insurance company than another?
Do I have to answer health questions to buy a Medigap policy in California?
Where can I see every Medigap insurer selling in Rancho Cucamonga?
Can I switch Medigap insurers later if I find a lower premium?
- 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 Rancho Cucamonga
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This page was last updated: September 2026.