Medicare Advantage in Redwood City, California: Your Plain-English 2027 Guide
9 Medicare Advantage plans in San Mateo County are changing for 2027, 12 plans are leaving and 5 plans are new. Use this guide to see how the plans work in Redwood City, California and what to compare, in plain terms.
Compare Medicare Advantage options near you
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This affects which Medicare Advantage options you can choose.
These listings are provided by licensed insurance partners.
Medicare Advantage plans in your area are changing or leaving for 2027.
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Medicare Advantage plans in your area are changing or leaving for 2027.
Is your plan on the list? One call tells you — before enrollment opens.
Available now — current wait: 0 min
A real person answers. About 5 minutes, no obligation.
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- Your doctors — confirmed in-network for 2027
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Medicare around Redwood City can look different from the county next door, and that's by design: plans are approved county by county, and Redwood City sits in San Mateo County (part of Redwood City area).
26 Medicare Advantage plans are available for 2027. About 51% of the county's Medicare members are in a Medicare Advantage plan rather than Original Medicare, among the roughly 132,242 residents who are 65 or older.
You'll see who offers coverage nearby, how the pieces of Medicare fit, what things cost in 2027, when the enrollment windows open, and where to turn for free, unbiased guidance.
Medicare Advantage companies in San Mateo County
Answer 3 quick questions to see Medicare options near you from licensed partners.
| Company | Local enrollment | Plans offered | Local agents | Action |
|---|---|---|---|---|
| Kaiser PermanenteRegional | — | Yes | ||
| Health Plan of San MateoRegional | — | Yes | ||
| Alignment Healthcare Usa LLCRegional | — | Yes | ||
| UnitedHealthcareNational | — | Yes | ||
| California Physicians' ServiceRegional | — | Yes | ||
| Scan GroupRegional | — | Yes |
How your Medicare choices fit together
Almost everyone starts with Original Medicare — Part A (hospital) and Part B (medical), run by the federal government. From there, you generally choose one of two directions, and understanding the fork is the whole game.
The Medicare Advantage path (Part C). You get your Part A and Part B benefits through a private plan approved by Medicare, usually with drug coverage included. Plans work within networks and service areas set at the county level, which is why availability in Redwood City, California depends on your county, not just your state.
The Original Medicare path. You stay with the government program and can add a stand-alone Part D drug plan, and often a Medigap policy to help with the out-of-pocket costs Original Medicare leaves behind — trading bundled extras for broad provider freedom.
Neither path is universally better; the right fit depends on your doctors, your prescriptions, your budget, and how you like to handle care. This guide explains how each works in Redwood City, California so you can decide for yourself. We don't rank or recommend specific plans.
By the numbers
How people get Medicare in San Mateo County
(MA penetration in San Mateo County)
MA penetration from CMS enrollment data; Medigap share is an estimate. U.S. average is about 54% Medicare Advantage. These are area-level figures, not plan-specific.
The 2027 numbers, from shared to plan-specific
Start with what's fixed for everyone. The standard Part B premium is $202.9 per month in 2026 (2026 amount; 2027 figure will be posted when CMS releases it), and Part A is premium-free for most people who paid Medicare taxes long enough while working.
On the drug side, Part D has real guardrails for 2027: a deductible capped at $700 and, a hard $2,400 ceiling on your out-of-pocket costs for covered prescriptions — the old coverage gap is gone.
Higher earners pay more for Parts B and D through an income-related adjustment called IRMAA, which for 2026 starts above $109,000 in annual income for an individual and is based on your 2024 tax return. Most people fall below that line and pay the standard amounts. The 2027 brackets will be posted when CMS releases them.
Everything past that is plan-specific: the premiums, copays, and coverage details of an individual Advantage or Medigap plan change from plan to plan and year to year. Rather than quote or rank those, we point you to Medicare's Plan Finder and a licensed agent for your exact numbers.
By the numbers
Medicare Part B premium, 2006–2026
The standard monthly Part B premium has climbed from $88.50 in 2006 to $202.90 in 2026. Hover any point for that year’s premium.
Source: CMS. Standard premium shown; in some hold-harmless years many existing enrollees paid less. Confirm at Medicare.gov.
Your Medicare enrollment calendar
The dates that follow are set federally, so they don't change from state to state — only your personal timing does.
It starts with your Initial Enrollment Period — the 7-month window around your 65th birthday month — the window around turning 65 when you first sign up. Missing it can mean late penalties that stick around, so it's the one not to sleep on.
After that, the big recurring window is the Annual Enrollment Period, October 15 – December 7, when anyone can join, switch, or drop an Advantage or Part D plan for a January 1 start. And if you're already in an Advantage plan, the Medicare Advantage Open Enrollment (January 1 – March 31) gives you one more chance to change course.
Life events — a move, a loss of other coverage — can also trigger a Special Enrollment Period. The calendar below shows the whole year at a glance.
Explore
When can you enroll? An interactive year
Enrollment windows are federal and the same nationwide. Confirm your personal dates at Medicare.gov or 1-800-MEDICARE.
Where to get free, unbiased help near Redwood City
Good Medicare help exists and it's free — you don't have to figure this out solo or pay for guidance.
For official specifics and the Plan Finder tool, go straight to Medicare.gov or 1-800-MEDICARE (TTY 1-877-486-2048). And a licensed agent can compare options and handle the paperwork with you.
One note on who we are: MyMedicarePlans.org is an independent, privately owned educational resource — not Medicare, not a government agency, and not affiliated with one. Our job is to help you get oriented, then hand you off to the official sources and licensed professionals for plan decisions.
Good to know