Why Medigap Is Different in California
California is one of the most consumer-friendly states for Medigap shoppers, thanks to a protection most states don’t offer: the annual birthday rule. This single policy gives California Medigap holders the freedom to shop for better rates every year — a right that beneficiaries in most other states simply don’t have.
Medigap (also called Medicare Supplement insurance) fills the cost-sharing gaps in Original Medicare — deductibles, coinsurance, and copays that can otherwise add up to thousands of dollars per year.
How Medigap Protects Your Wallet
Under Original Medicare alone, you’re responsible for:
- The $1,736 Part A hospital deductible (per benefit period)
- $434/day for hospital days 61-90, and $868/day for lifetime reserve days
- 20% of all Part B services after your $283 annual deductible — with no annual cap
- $217/day for skilled nursing days 21-100
A Medigap plan absorbs some or all of these costs, depending on which plan letter you choose. The trade-off is a monthly premium on top of your Part B premium.
The 10 Standardized Plans
Every Medigap plan with the same letter offers identical benefits, no matter which company sells it. The only differences between companies are price and customer service. Here’s what each plan covers:
| What’s Covered | A | B | C* | D | F* | G | K | L | M | N |
|---|---|---|---|---|---|---|---|---|---|---|
| Part A hospital coinsurance + 365 extra days | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | 50% | 75% | ✓ | ✓ |
| Part B coinsurance or copay | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | 50% | 75% | ✓ | ✓† |
| First 3 pints of blood | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | 50% | 75% | ✓ | ✓ |
| Part A hospice coinsurance | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | 50% | 75% | ✓ | ✓ |
| Part A deductible ($1,736) | ✓ | ✓ | ✓ | ✓ | ✓ | 50% | 75% | 50% | ✓ | |
| Part B deductible ($283) | ✓ | ✓ | ||||||||
| Part B excess charges | ✓ | ✓ | ||||||||
| Foreign travel emergency | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ||||
| Annual OOP limit | $8,000 | $4,000 |
* Plans C and F are only available to those who became Medicare-eligible before January 1, 2020.
† Plan N covers Part B coinsurance except for up to $20 copay at doctor visits and up to $50 copay for ER visits that don’t result in admission.
California’s Birthday Rule — Your Annual Shopping Window
Each year, starting on your birthday, you have a 30-day guaranteed-issue window to switch to any Medigap plan of equal or lesser value from any insurer. No health questions. No medical underwriting. No denial. This means you can shop for lower rates every single year without risk — something beneficiaries in 47 other states cannot do. Mark your birthday on the calendar as your annual Medigap shopping day.
Which Plan Do Most Californians Pick?
Plan G is the most popular choice for new enrollees. It covers everything except the $283 annual Part B deductible — meaning once you pay that $283, you have zero out-of-pocket costs for the rest of the year. For most Californians, the predictability is worth the premium.
Plan N appeals to cost-conscious beneficiaries willing to pay small copays ($20 for office visits, $50 for non-admitted ER visits) in exchange for lower monthly premiums.
When to Buy Medigap
Your best window is the 6-month Medigap Open Enrollment Period that starts the month you turn 65 and are enrolled in Part B. During this window, insurers must sell you any plan at the standard rate — regardless of health conditions. After this window closes, insurers in California can require medical underwriting (though the birthday rule gives you annual opportunities to switch).
Medigap vs. Medicare Advantage — The California Decision
This is the fundamental choice every new California Medicare beneficiary faces:
- Medigap + Original Medicare + Part D: See any Medicare doctor in the country. Predictable costs. Higher premiums. No dental/vision/hearing unless purchased separately.
- Medicare Advantage: Lower premiums. Dental, vision, hearing often included. But restricted to plan networks, and costs vary depending on what services you use.
There’s no universally “right” answer — it depends on your health, your doctors, your budget, and how you prefer to manage risk. A licensed California agent can model both paths for your specific situation.