Updated July 2, 2026
California gives Medigap enrollees something no other state offers at initial enrollment: the right to switch plans every year around your birthday. Plan G here runs around $200 per month, reflecting California's higher healthcare costs and the relatively generous consumer protections the state requires.
Things to Know About Medigap in California
- Plan G in California runs about $200 a month for a typical new enrollee, though age, sex, tobacco use and insurer all move that number.
- Every Plan G sold in California covers the same federally standardized benefits, so price and rating method are what actually separate one carrier from another.
- Your 6 month Open Enrollment window in California opens the month your Medicare Part B coverage starts, and no insurer can turn you down or charge more for health history during it.
- Miss that window in California and carriers can medically underwrite new applications, which can mean a higher rate or a declined application.
California's Birthday Rule
Since 2021, California law has allowed Medicare supplement policyholders to switch to a plan with equal or lesser benefits within 60 days of their birthday each year: without medical underwriting. That means if you bought Plan G at 65 and want to move to a lower-cost plan at 70, you can do it annually without answering health questions. No other trigger is required. This protection is state law, not federal, so it applies only to policies issued in California. It does not let you upgrade to richer coverage without underwriting, only match or step down. For new enrollees, the standard 6-month Open Enrollment window still applies from the month Part B begins. Use the open enrollment calculator to find your initial window.
Comparing plans and prices in California
Federal standardization sets the benefits for each plan letter: every Plan G covers the same services regardless of who sells it. California's market is competitive, with many carriers offering Plan G, so shopping matters. Use the Medigap cost calculator for an age-based estimate, and review what each plan covers before deciding whether Plan G or another letter fits your situation. The Medigap vs Advantage calculator can help if you are weighing both options.
FAQs
How much does Medigap Plan G cost in California?
Plan G premiums in California run around $200 a month for most new enrollees, though your exact rate depends on your age, sex, tobacco use and the insurer you choose.
When can I enroll in Medigap in California without medical underwriting?
Your 6 month Medigap Open Enrollment period in California starts the month your Medicare Part B coverage begins, and no insurer can deny you or charge more based on health history during that window.