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  1. 🏠
  2. Medicare Advantage Plans
  3. California
  4. Alameda County

2027 Medicare Advantage Plans in Alameda County, CA

Last update: October 5, 2026.

For 2027, Alameda County, CA includes 16 Medicare Advantage plans. Enrollment across these plans totals approximately 77,204, with 9 $0 premium options and 50% rated 4 stars or higher.

This page and its statistics exclude Medicare Advantage Special Needs Plans (SNPs). Special Needs Plans in Alameda County, CA are summarized separately. Visit Medicare Options in Alameda County, CA to see more options.

  • HMO Plans
  • HMO-POS Plans

At a Glance

County-level summary of Medicare Advantage plan availability and enrollment based on CMS data.

  • Average Monthly Premium: $20.96/mo
  • $0 Premium Plans: 9
  • Average MOOP: $4,265 ($9,250 max. in 2027)
  • Star Ratings (Plan Mix): 4+ Stars: 50% · 3 Stars: 44% · Below 3: 6%
  • Average Part D Deductible: $295.00
  • Total MA/MAPD Enrollment: 77,204
  • Plans with the Highest Enrollment
    (as of October 5, 2026)
    1. Kaiser Permanente Senior Advantage Alam., SF, Napa (HMO) — 40,891 enrollees
    2. Kaiser Permanente Senior Advantage Basic Alameda (HMO) — 22,670 enrollees
    3. SCAN Classic (HMO) — 6,376 enrollees

Medicare Advantage HMO Plans

Health Maintenance Organization (HMO) plans are built around a defined network of doctors and hospitals. Care is generally covered only within the network, except in emergencies, but this structure often results in lower premiums and out-of-pocket costs.

Total HMO Plans
15
Average Monthly Premium
$18.42/mo
Total HMO Enrollment
75,560
$0 Premium HMO Plans
9
Average MOOP
$4,073
Top HMO by Enrollment
Kaiser Permanente Senior Advantage Alam., SF, Napa (HMO) — 40,891 enrollees
HMO Plans Without Drug Coverage
2

2027 HMO Medicare Advantage plans in Alameda County, California (comparison chart)
Plan Name CMS Stars* Premium/Mo MOOP Rx Ded. CMS ID
Kaiser Permanente Senior Advantage Alam., SF, Napa
☆☆☆☆☆
$105 $3,900 $0 H0524-032-0
Kaiser Permanente Senior Advantage Basic Alameda
☆☆☆☆☆
$28 $6,000 $0 H0524-059-0
Blue Shield Inspire
☆☆☆☆☆
$60 $4,300 $475 H0504-041-0
Imperial Courage Plan
☆☆☆☆☆
$0 $2,999 N/A H5496-016-0
Imperial Dynamic Plan
☆☆☆☆☆
$0 $295 $0 H5496-012-0
SCAN Classic
☆☆☆☆☆
$0 $2,000 $450 H5425-075-0
SCAN Costco Medicare Advantage
☆☆☆☆☆
$0 $2,000 $450 H5425-139-0
Sutter Senior Advantage, a SCAN Medicare Plan
☆☆☆☆☆
$66 $4,900 $450 H5425-124-0
Alignment Health Honor Plus 060
☆☆☆☆☆
$7 $9,850 $700 H3815-060-0
Alignment Health My Choice 050
☆☆☆☆☆
$0 $3,499 $0 H3815-050-0
Central Health Harmony 031
☆☆☆☆☆
$0 $3,400 $0 H3815-031-0
Aetna Medicare Eagle
☆☆☆☆☆
$0 $4,450 N/A H0523-099-0
Aetna Medicare Signature Extra
☆☆☆☆☆
$0 $3,600 $400 H0523-070-0
CCHP Senior Value Program
☆☆☆☆☆
$0 $6,000 $0 H0571-011-0
Aetna Medicare Signature
☆☆☆☆☆
$10 $3,900 $700 H4982-007-0
What is the total number of HMO plans offered in Alameda?

There are 15 HMO plans in 2027, covering 75,560 enrollees.

How much do HMO plans cost in Alameda?

The average HMO premium in Alameda is $18.42 per month, with 9 plans offering $0 premiums.

What is the top HMO by enrollment in Alameda?

Kaiser Permanente Senior Advantage Alam., SF, Napa (HMO) is the top HMO in Alameda, with 40,891 enrollees.

What is the number of HMO plans without Part D coverage in Alameda?

2 HMO plans in Alameda do not include prescription drug coverage.

Medicare Advantage HMO-POS Plans

HMO-POS plans are structured like HMOs, requiring in-network care for the lowest costs, while allowing limited out-of-network access at higher cost. This provides added flexibility compared with standard HMO plans.

Total HMO-POS Plans
1
Average Monthly Premium
$59.00/mo
Total HMO-POS Enrollment
1,644
$0 Premium HMO-POS Plans
0
Average MOOP
$7,150
Top HMO-POS by Enrollment
AARP Medicare Advantage from UHC CA-7 (HMO-POS) — 1,644 enrollees
HMO-POS Plans Without Drug Coverage
0

2027 HMO-POS Medicare Advantage plans in Alameda County, California (comparison chart)
Plan Name CMS Stars* Premium/Mo MOOP Rx Ded. CMS ID
AARP Medicare Advantage from UHC CA-7
☆☆☆☆☆
$59 $7,150 $505 H0543-188-0

What is the average monthly premium for HMO-POS plans?

HMO-POS plans in Alameda cost $59.00 per month on average.

Which HMO-POS plan is most popular in Alameda?

The most popular HMO-POS plan in Alameda is AARP Medicare Advantage from UHC CA-7 (HMO-POS), with 1,644 enrollees.

How many HMO-POS plans in Alameda do not include drug coverage?

There are 0 HMO-POS plans in Alameda without prescription drug coverage.

CMS quality ratings for Medicare Advantage plans in Alameda County, CA (2027) are summarized below.

Medicare Advantage Plan Ratings in Alameda County, CA (2027)
Rating Category Number of Plans Percent of Plans
5 Stars No 5-star plans available. 0%
4 Stars (includes 5 Stars) 8 50%
3 Stars 7 44%
Below 3 Stars 1 6%
Not Rated 0 0%
Average Rating 3.63

* CMS assigns Medicare Advantage star ratings annually based on plan quality and performance measures.

Primary CMS datasets used for this Medicare Advantage Plan county resource.
Data Source Publisher CMS Version
Landscape Source Files Centers for Medicare & Medicaid Services CY2027 Landscape (202609.1)
Medicare Part C & D Performance Centers for Medicare & Medicaid Services 2027 Star Ratings Data Tables
Plan Benefits Package Centers for Medicare & Medicaid Services PBP Benefits-2027
Monthly Enrollment by Contract/Plan/State/County Centers for Medicare & Medicaid Services 2026-09

All plan counts, enrollment totals, averages, and percentage distributions are calculated at the county level using CMS data and include standard Medicare Advantage (MA/MAPD) plans only, based on a consistent aggregation methodology.

Data sources and methodology documentation.

Secondary Medicare references and explanatory resources.
Publisher Reference Last Accessed
Medicare.gov Understanding Medicare Advantage Plans 25 May, 2025
Medicare.gov Compare Original Medicare & Medicare Advantage 25 May, 2025
NCOA.org 5 Steps to Choosing the Right Medicare Plan for You 25 May, 2025

MedicarePlans.com is an independent informational resource and has no affiliation with, or endorsement from, the U.S. Government or the federal Medicare program.

Data provenance is documented in accordance with the U.S. Core Data for Interoperability (USCDI) Provenance standard .

Page content independently curated and maintained by David W. Bynon, Editorial Steward, using a standardized, data-driven methodology for accurate, non-commercial Medicare plan interpretation and resolution.

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