Medicare insurance in California is a type of health insurance that provides coverage to people eligible for Medicare in California. The federal government administers Medicare in California, but the state of California can provide additional benefits and programs unavailable in other states. There are several different types of Medicare insurance plans in California, including Original Medicare, which is a fee-for-service plan that allows you to see any doctor or provider that accepts Medicare; Medicare Advantage, which is a type of health plan that provides all of your Medicare benefits through a private insurer; and Medicare Supplement, which is a type of insurance policy that helps pay for some of the costs that Original Medicare doesn’t cover.