Top Medicare Advantage Plans in California 2027

Nationally, large insurers are trimming PPOs and pulling plans from some counties for 2027. In California, read your Annual Notice of Change, and if you received a non-renewal letter, choose a new plan before December 31, 2026.

Source: company announcements and CMS 2027 landscape data reported by Becker’s on October 1, 2026. For 2027, Wellmark, Blue Cross Blue Shield of North Dakota and Blue Cross Blue Shield of Mississippi are exiting Medicare Advantage as well.

Medicare Advantage, sometimes called Part C, lets you receive your Medicare benefits through a Medicare-approved private insurer. These plans cover everything Original Medicare Part A and Part B cover, with the exception of hospice care, which Original Medicare continues to pay for. Most also bundle Part D drug coverage, and many may tack on extras like routine dental, vision and hearing benefits.

The trade-off is that Medicare Advantage plans generally rely on doctor and hospital networks and may call for referrals or prior authorization for certain services. Each Medicare Advantage plan sets a yearly out-of-pocket maximum for covered medical care, something Original Medicare lacks. You still pay your Part B premium, along with the plan’s premium if there is one.

If Original Medicare is your preference, a Medicare Supplement (Medigap) plan covers some or all of what Medicare leaves unpaid and lets you use any U.S. provider that accepts Medicare. Since benefits are standardized by plan letter, compare what insurers charge for the same letter.

Plan letter determines Medigap benefits, which are standardized. Prices differ by insurer, age, ZIP code and tobacco use.

If you keep Original Medicare in California, add a standalone Part D plan. Compare plans with your exact drugs and pharmacies using the 2027 Part D plan finder.

A non-renewal notice should have reached you in early October if your plan won’t be available in your county for 2027. Coverage doesn’t end immediately; it runs through December 31, 2026, which gives you time to decide.

Special Needs Plans (SNPs) are Medicare Advantage plans designed for particular groups. Their benefits, networks and drug lists are shaped around the members they serve, and many come with care coordinators. In 2027, SNPs are one of the few places large insurers are adding plans, even while cutting PPOs.

When you turn 65 in 2027, you get a seven-month Initial Enrollment Period: the three months before your birthday month, the birthday month itself and the three months that follow. If you sign up in the first three months, coverage begins on the first day of your birthday month.

When your income and savings are limited, two programs can greatly lower your Medicare costs:

If you qualify for both Medicare and full Medicaid, you may also be able to join a Dual Special Needs Plan. See help for low-income Part D beneficiaries.

In California, HICAP (Health Insurance Counseling and Advocacy Program) provides Medicare counseling that is free and unbiased. You can also call 1-800-MEDICARE any time or compare plans with a licensed agent at no cost.

Gather your Medicare card, a list of your drugs and doses, your doctors and your preferred pharmacies before you call. That way a long conversation becomes a quick one.