Dennis Jarvis, serving California since 1999. No cost, no pressure.
Medicare Supplement (Medigap) Plans in California (2026)
- Medigap works alongside Original Medicare to cover the costs Medicare leaves you owing, including that uncapped 20%.
- Medigap plans are federally standardized by letter, a Plan G is identical benefits from any carrier. You're really shopping price and carrier stability.
- You can see any doctor nationwide that accepts Medicare, no networks, no referrals.
- California's Birthday Rule lets you switch plans every year without medical underwriting, so you're never locked in.
- Most people on Medigap should shop their rate yearly, increases vary wildly by carrier. We do this for free.
Top Medicare Supplement Companies in California - Watch on YouTube
A Medicare Supplement, or Medigap, plan works with Original Medicare to pay the costs Medicare doesn't. For people who want the freedom to see any doctor and predictable, low out-of-pocket costs, it's the classic choice. This guide is your complete California Medigap resource, with real rate data most sites won't show you.
Why Do You Even Need a Supplement?
⚠️ The uncapped 20% most people don't know about
Original Medicare (Parts A and B) has NO annual out-of-pocket maximum. After your deductibles, Medicare pays 80% of your Part B costs, and you pay the other 20%, with no cap. Most Medicare enrollees don't realize this. For a normal year, that's manageable. But for a cancer diagnosis, a major surgery, or a long illness, that 20% of a six-figure bill could be tens of thousands of dollars, with nothing stopping it.
That's the entire reason Medigap exists: it covers that 20% (and more), turning unpredictable, unlimited exposure into a predictable monthly premium. It's the financial protection Original Medicare alone doesn't give you.
How Does Medigap Work?
Fills the gaps
Pays your share of Medicare-covered costs, deductibles and that 20% coinsurance, so you face little to nothing at the point of care.
Any doctor nationwide
No networks. See any provider in the country that accepts Medicare, ideal if you travel or want maximum freedom.
Standardized by law
Plans are labeled by letter (G, N, etc.). A Plan G from one carrier is identical to a Plan G from another. Only price and service differ.
Add Part D separately
Medigap doesn't include drug coverage, so you pair it with a standalone Part D plan.
The Most Popular Plans: G and N
Two plans dominate the California market today. Plan G is the most comprehensive widely-sold plan, it covers essentially everything after the small annual Part B deductible. Plan N trades small copays for a lower premium. We break each down in detail, and compare them head-to-head.
As you can see, the market has moved overwhelmingly to Plan G, which has an important consequence for anyone still on an old Plan F. If that's you, our Plan F vs Plan G page could save you real money.
California's Secret Weapon: The Birthday Rule
You're never locked in
In most states, once you're past your initial enrollment, switching Medigap plans requires passing medical underwriting, meaning you can be denied or charged more for health conditions. But California has a Birthday Rule that gives you a window each year, around your birthday, to switch to an equal or lesser plan without underwriting.
This changes everything. It means you can shop for a better price every single year, regardless of your health. And since rate increases vary dramatically by carrier (as we'll show you), that's a powerful way to keep your costs down. It's the single biggest reason a California Medigap client should never just "set it and forget it."
Not sure you've got Medicare right?
Skip the confusion and the sales calls. Get straight answers for your situation, free.
Turning 65 and buried in mailers and robocalls? Confused by the choices, or afraid of the wrong plan or a missed deadline? See what actually fits your doctors and budget in about 5 minutes.
Find my plan →Think you might be overpaying, or did your plan change for this year? Get an honest check for gaps, overpayments, and dropped doctors in about 3 minutes.
Review my coverage →Free, no pressure, and we never cold-call you.
What This Means for You
Medigap gives you freedom and protection, but the smart play is choosing the right plan AND shopping your rate over time. That's exactly what we help California clients do, at no cost. Explore the full guide below: Plan G, Plan N, the comparison chart, pricing & discounts, and how to choose a company.