Medicare by region · Los Angeles County
Ten million people, the largest Medicare market in America, Kaiser on one side and UCLA, Cedars-Sinai, Keck, Providence and City of Hope on the other — and the county where the 2026 PPO shake-up hit hardest.
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Medicare in the region
Los Angeles County is Medicare at its most crowded: dozens of Advantage plans, hundreds of medical groups, and a care map where the plan you pick decides whether you see a UCLA cardiologist or a Cedars one. Advantage plans here work through delegated medical groups (Optum, Regal, HealthCare Partners, Facey, Torrance Memorial IPA and others), so the question is not only which hospital but which group your primary doctor belongs to.
Kaiser is its own answer: roughly a third of the county’s seniors take Medicare through Senior Advantage and never touch the rest of the menu. For everyone else, a Medigap policy with Original Medicare opens every non-Kaiser door in the county at once, and California’s birthday rule lets you re-shop it every year.
What changed for 2026: Anthem Blue Cross ended its Advantage PPO plans in California and Aetna closed plans across the county, which pushed a lot of Angelenos who chose a PPO for its out-of-network freedom into a decision between an HMO, a different PPO and a Medigap policy. The county menu is still the deepest in the country — Kaiser, SCAN, Alignment, Blue Shield, UnitedHealthcare, Humana, Wellcare, Central Health, Brand New Day and many more — and every plan rides on a different set of medical groups.
Counties: Los Angeles.
Each contracts differently with each plan; we check your doctors first.
Turning 65? Your Initial Enrollment Period is the 7 months around your birthday. Already on Medicare? The Annual Election Period is Oct 15–Dec 7, Medicare Advantage Open Enrollment runs Jan 1–Mar 31, and California’s Medigap birthday rule gives you 60 days from your birthday each year to switch supplements without health questions.
Your options
All-in-one Part C plans, often $0 premium, built on a county network — the choice of about half of California, and the one that changed most for 2026.
How Advantage worksMedigap pairs with Original Medicare and works with any provider nationwide — UCLA, Stanford, Cedars, City of Hope, or your doctor in Arizona — with California’s birthday rule to switch every year.
How Medigap worksStandalone drug coverage chosen around your medications and pharmacy. 2026 out-of-pocket cap: $2,100.
How Part D worksSenior Advantage is its own world: everything in one system, and no Medigap route in. When it fits, and when it doesn’t.
Kaiser & MedicareQuestions from Los Angeles County
The deepest Medicare Advantage menu in the country, including many Dual Special Needs Plans and Medi-Medi Plans, plus every Medigap carrier in California and the full Part D lineup. Availability is set by county and changes each plan year; for 2026 Anthem’s PPOs left and Aetna reduced its plans here.
Each system contracts with some Medicare Advantage plans and not others, and the lists change every October. With Original Medicare and a Medigap policy there is no network to check, except Kaiser, which is reached only through Kaiser Senior Advantage. We confirm your doctors before you enroll.
Nothing. Independent agents are paid by the carriers when you enroll, so comparing plans and reviewing your coverage each year is free to you.
Ready when you are
A short, friendly conversation — no pressure, no cost.
Written and reviewed by Darin Weidauer — licensed insurance agent (NPN 18580338, CA License #0M00978), Gerontologist (USC Leonard Davis School of Gerontology), MBA, Registered Social Security Analyst, and 22-year U.S. Air Force veteran.Last reviewed September 4, 2026. Plan availability, benefits and costs change every plan year — verify current details at Medicare.gov, 1-800-MEDICARE, or California HICAP at 1-800-434-0222.