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Medigap Plan G in California (2026)

Key Takeaways
  • Plan G is the most comprehensive widely-available Medigap plan, it covers everything except the small annual Part B deductible.
  • It's now the most popular plan in California (~71% of new policies).
  • Because benefits are standardized, every carrier's Plan G is identical, you're only shopping price and stability.
  • Plan G rates have been rising fast lately, and increases vary a lot by carrier.
  • California's Birthday Rule lets you switch Plan G carriers each year to chase the best price, without underwriting.

Plan G is the gold standard of Medicare Supplement plans, and for good reason. It covers virtually all of your out-of-pocket Medicare costs, lets you see any doctor nationwide, and has become the most popular choice in California. Here's everything you need to know, including the rate reality most sites won't show you.

What Does Plan G Cover?

Plan G covers essentially everything Original Medicare leaves you owing, except the annual Part B deductible (a relatively small amount). After you pay that once per year, Plan G picks up:

The Part A deductible

Covers the hospital deductible per benefit period, which can be over $1,600 each time.

The uncapped 20%

Covers your 20% Part B coinsurance, the big one. No more unlimited exposure.

Foreign travel emergency

Includes emergency care during foreign travel (up to plan limits).

Excess charges & more

Covers Part B excess charges, skilled nursing coinsurance, and the first 3 pints of blood.

The only thing you pay is that once-a-year Part B deductible. After that, for Medicare-covered services, you're essentially covered, with any doctor in the country who accepts Medicare.

Why Plan G Is So Popular

The Market Has Moved From Plan F to Plan G
Medigap policy distribution by plan type (2016-2025)
2016
2018
2020
2022
2024
2025
First-Dollar (F)Plan GPlan NAll Other
Source: CSG Actuarial. First-dollar (Plan F) fell from 60% to under 8%; Plan G grew from 17% to 71%.

Plan G now makes up around 71% of new Medigap policies in California. It became the default when Plan F closed to people newly eligible for Medicare, and because it offers nearly identical coverage to Plan F for a lower premium. If you want maximum, predictable protection, Plan G is usually the answer.

What Does Plan G Cost in California?

Here's what most sites won't show you, real Plan G rates from California's three biggest carriers:

Plan G Starting Rates, California's Big 3 Carriers
Same Plan G benefits, different prices. ZIP 90003, age 65.
Blue Shield of CA
$212/mo
Anthem Blue Cross
$227/mo
UnitedHealthcare
$233/mo
The key insight: All three are the exact same Plan G coverage (benefits are federally standardized). You're only paying for the name and the price, so why overpay?
For research purposes only. Example rates for ZIP 90003, age 65, Plan G, as of September 2026, shown before New-to-Medicare or other discounts. Your rates may differ based on age, ZIP code, carrier, and time of enrollment.

Notice they're all the same coverage at different prices. Since a Plan G is a Plan G, that price gap is pure savings if you shop it right.

The Rate Reality: Plan G Is Rising Fast

Plan G Premiums Are Climbing Fast
Average annual Plan G premium, 5 lowest carriers (2020-2026)
$1,200$1,400$1,600$1,8002020202120222023202420252026
Source: CSG Actuarial. Premiums rose from ~$1,328 to ~$1,888, accelerating sharply since 2024.

Why this makes the Birthday Rule so valuable

Plan G premiums have climbed steeply, and they don't rise evenly across carriers. One company might raise rates 5% while another raises 20% the same year. California's Birthday Rule lets you jump to a better-priced carrier every year without medical underwriting. Same Plan G coverage, better price, no health questions. Most people never use this, and overpay for years. We watch it for our clients, free.

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Is Plan G Right for You?

Plan G is ideal if you want the most complete, predictable coverage and the freedom to see any Medicare doctor nationwide, and you're comfortable with a higher premium than a plan like Plan N in exchange for near-zero costs at the point of care. If you'd accept small copays for a lower premium, compare with our Plan G vs Plan N breakdown. Either way, we'll shop every carrier to get you the best rate.

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Frequently Asked Questions
▸ What does Medigap Plan G cover?
Plan G covers essentially everything Original Medicare leaves you owing except the annual Part B deductible. That includes the Part A hospital deductible, your 20% Part B coinsurance (the uncapped one), Part B excess charges, skilled nursing coinsurance, foreign travel emergencies, and the first 3 pints of blood. After paying the small annual Part B deductible once, you're essentially covered for Medicare services.
▸ How much does Plan G cost in California?
It varies by carrier, age, and ZIP code. As an example, for age 65 in ZIP 90003, Plan G recently ran about $212/month with Blue Shield, $227 with Anthem, and $233 with UnitedHealthcare - before any discounts. Since every carrier's Plan G is identical coverage, the price difference is pure savings if you shop it. Rates change, so get a current quote.
▸ Why is Plan G the most popular Medigap plan?
Plan G became the most popular plan (about 71% of new California policies) after Plan F closed to people newly eligible for Medicare in 2020. Plan G offers nearly identical coverage to Plan F - the only difference is you pay the small annual Part B deductible - usually for a lower premium. It's the most comprehensive plan available to new enrollees.
▸ Do Plan G rates go up?
Yes, and they've been rising fast recently - but increases vary widely by carrier, sometimes from 5% to over 20% in the same year. Because a Plan G is standardized (identical coverage everywhere), California's Birthday Rule lets you switch to a lower-priced carrier each year without medical underwriting. Shopping your rate annually is the smart way to control Plan G costs.
▸ Is Plan G worth it?
For most people who want predictable, comprehensive coverage and the freedom to see any Medicare doctor nationwide, yes. Plan G covers the uncapped 20% coinsurance that Original Medicare leaves exposed, so you're protected from large unexpected bills. The main alternative is Plan N, which has a lower premium but small copays - we help you compare both.
The information above is general guidance about California Medicare Supplement insurance and may change as rates, plans, and rules are updated each year. It is not a substitute for personalized advice. For current, personalized guidance, please contact us, email help@calhealth.net, or call 800-320-6269. Serving California since 1994.
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