California’s Medigap Birthday Rule: How It Works in Riverside County
If you have a Medicare Supplement (Medigap) policy and your premium has crept up, you might assume you’re stuck. In most states, switching Medigap policies after your initial open enrollment means answering health questions, and an insurer can say no. California is different. We have what’s commonly called the Medigap birthday rule, and it’s one of the most useful protections California residents have. Here’s how it works for my clients in Temecula, Murrieta and the rest of Southwest Riverside County.
What the birthday rule is
California law gives people who already have a Medigap policy an annual open enrollment period that starts on their birthday and lasts at least 60 days. During that window, you can buy another Medigap policy with the same or lesser benefits, and the insurer can’t deny you or charge you more because of your health (California Department of Insurance). There’s also no new waiting period for pre-existing conditions. The Contra Costa County HICAP’s 2026 consumer guide summarizes the same rule and notes it applies even if you’re in the middle of ongoing medical treatment (HICAP birthday rule Q&A).
Insurers are also required to notify you of this right shortly before your birthday window opens, so watch your mail in the month or two before your birthday.
Who can use it
- People who already have a Medigap policy in force.
- People switching to a policy with equal or lesser benefits, either the same plan letter from a different company or a plan with fewer benefits.
It does not help you move from a Medicare Advantage plan to Medigap, and it doesn’t apply if you don’t currently have a Medigap policy (HICAP). If you’re on Medicare Advantage and thinking about Original Medicare plus Medigap, we’d need to look at other guaranteed-issue rights or medical underwriting.
What “equal or lesser benefits” means in practice
Medigap policies are standardized, and each plan type is identified by a letter. A Plan G from one company has the same core benefits as a Plan G from another. Premiums, customer service, and how each company prices its policies over time can differ (Medicare.gov: Medigap). That’s why the birthday rule is mainly a chance to:
- Keep the same plan letter with a company whose premium better fits your budget.
- Step down to a plan with fewer benefits if you’d rather pay a lower premium in exchange for more cost-sharing.
Moving up to a plan with more benefits isn’t covered by the birthday rule. That generally means going through underwriting.
A note on Plans C and F
Under federal rules, people who became newly eligible for Medicare on or after January 1, 2020 can’t buy Plans C or F. People eligible before that date may still be able to keep or buy them (Medicare.gov: Medigap). If you have one of these older plans, the birthday rule comparison can look a little different, and it’s worth reviewing carefully.
How I help clients use the birthday rule
When I sit down with someone in Murrieta or Menifee before their birthday, we go through a simple process:
- Confirm your current Medigap plan letter, premium and effective date.
- Mark your birthday window on the calendar: it starts on your birthday and runs at least 60 days.
- Compare the same plan letter, and any lesser-benefit options you’re open to, from the companies I work with.
- Time the new policy so it starts as the old one ends, so there’s no gap and no double premium.
- Cancel the old policy only after the new one is approved and in effect.
That last step matters. Never cancel your current Medigap policy until your new one is confirmed.
The birthday rule and your drug plan
The birthday rule applies only to Medigap. Most prescriptions are covered by a separate Part D plan, and you change Part D during the Annual Enrollment Period, October 15 to December 7, for coverage starting January 1. This fall’s AEP picks your 2027 coverage. My article Medicare 2026 in Temecula & Murrieta has the current Part D cost-sharing figures.
Local considerations
Medigap works with Original Medicare. You can generally see any provider nationwide who accepts Medicare, which is part of why Medigap appeals to people in Temecula, Fallbrook and Hemet who travel or see specialists outside the area. Medigap premiums in California can vary by things like your age and ZIP code, depending on how a company prices its policies. That’s another reason to compare during your window.
If you’re newer to Medicare, start with Turning 65 in Temecula or Murrieta: Your Medicare Checklist. For free, unbiased counseling, contact HICAP at 1-800-434-0222 (California Department of Aging). To compare Medigap options during your birthday window, call me at 760-297-0366 or request a free Medicare review.
Frequently Asked Questions
If you already have a Medigap policy, California gives you an annual window starting on your birthday and lasting at least 60 days to switch to a Medigap policy with the same or lesser benefits without health questions.
No. The birthday rule only applies to people who already have a Medigap policy. Moving from Medicare Advantage to Medigap follows different rules.
No. The birthday rule protects switches to equal or lesser benefits. Moving to a richer plan generally involves medical underwriting.
No. Keep your current policy until your new policy is approved and in effect, then cancel the old one to avoid a gap in coverage.
You can call me at 760-297-0366 to compare options from the companies I work with, or contact HICAP at 1-800-434-0222 for free counseling.
Questions about your own situation? Call me at 760-297-0366 or request a free Medicare review. I’m Cesar Ramirez with Temeku Insurance, CA License #0M47591, serving Temecula, Murrieta, Menifee, Sun City, Wildomar, Lake Elsinore, Hemet and Fallbrook.