Top 10 Medicare Supplement Companies in California - Watch on YouTube
A Medicare Supplement (Medigap) plan works with Original Medicare to pay the costs Medicare doesn't — deductibles, copays, and that 20% coinsurance Original Medicare leaves you owing with no cap. For people who want predictable costs and the freedom to see any doctor, Medigap is the classic choice. Here's how it works in California.
Medigap pays your share of Medicare-covered costs — the deductibles and 20% coinsurance — so you face little to nothing when you get care.
No networks. See any provider in the country that accepts Medicare — ideal if you travel or want maximum freedom.
Plans are labeled by letter (G, N, etc.) and standardized by law. Plan G from one carrier = Plan G from another. Only price and service differ.
Medigap doesn't include drug coverage, so you pair it with a standalone Part D plan.
| Feature | Plan G | Plan N |
|---|---|---|
| Coverage level | Most comprehensive widely-sold plan | Slightly less; small copays apply |
| Doctor/office copay | None | Up to $20 copay for some visits |
| ER copay | None | Up to $50 (waived if admitted) |
| Part B excess charges | Covered | Not covered |
| Premium | Higher | Lower |
| Best for | Maximum predictability | Lower premium, okay with small copays |
Plan G is the most popular comprehensive choice; Plan N trades small copays for a lower premium. Both let you see any Medicare doctor nationwide.
Medigap has a higher monthly premium than most Medicare Advantage plans, but far lower costs when you use care. Premiums for the same lettered plan vary by carrier, age, and area — sometimes significantly — which is why comparing carriers matters. Since the benefits are identical for a given letter, you're really shopping for the best price and a stable carrier.
Normally, switching Medigap plans after your initial enrollment requires passing medical underwriting — you can be turned down or charged more for health conditions. But California's Birthday Rule gives you a yearly window around your birthday to switch to an equal or lesser plan without underwriting. This means you can shop for a better price each year without being locked in by your health. It's one of the best consumer protections in the country, and we help clients use it.