2026 Medicare Advantage Plans in Napa County, CA
Last update: . Enrollment data updated: May 2, 2026
In Napa County, CA, there are 4 Medicare Advantage plans available for 2026. Of these, 3 offer a $0 monthly premium, and about 25% are rated 4 stars or higher based on CMS quality ratings.
Medicare Advantage Special Needs Plans (SNPs) are not included in the figures shown above. View Special Needs Plans in Napa County, CA. Or explore all Medicare Options available in Napa County, CA.
Medicare Advantage HMO Plans
HMO plans typically require members to use in-network providers and facilities, except in emergencies. In return, HMOs often offer lower monthly premiums and reduced cost-sharing.
- Total HMO Plans
- 4
- Average Monthly Premium
- $24.75/mo
- Total HMO Enrollment
- 8,394
- $0 Premium HMO Plans
- 3
- Average MOOP
- $2,599
- Top HMO by Enrollment
- Kaiser Permanente Senior Advantage Alam., SF, Napa (HMO) — 7,011 enrollees
- HMO Plans Without Drug Coverage
- 1
| Health Plan Name | CMS Rating* | Premium Per Mo | MOOP | PDP Ded. | CMS Plan ID |
|---|---|---|---|---|---|
| Kaiser Permanente Senior Advantage Alam., SF, Napa | $99 | $3,900 | $0 | H0524-032-0 | |
| Imperial Courage Plan | $0 | $2,999 | N/A | H5496-016-0 | |
| Imperial Dynamic Plan | $0 | $296 | $0 | H5496-012-0 | |
| Humana Gold Plus H5619-147 | $0 | $3,200 | $615 | H5619-147-0 |
What is the average monthly premium for HMO plans?
HMO plans in Napa cost $24.75 per month on average.
Which HMO plan is most popular in Napa?
The most popular HMO plan in Napa is Kaiser Permanente Senior Advantage Alam., SF, Napa (HMO), with 7,011 enrollees.
How many HMO plans in Napa do not include drug coverage?
There are 1 HMO plans in Napa without prescription drug coverage.
The table below shows CMS star ratings for Medicare Advantage plans in Napa County, CA for 2026.
| Rating Category | Number of Plans | Percent of Plans |
|---|---|---|
| 5 Stars | No 5-star plans available. | 0% |
| 4 Stars (includes 5 Stars) | 1 | 25% |
| 3 Stars | 3 | 75% |
| Below 3 Stars | 0 | 0% |
| Not Rated | 0 | 0% |
| Average Rating | 3.63 | |
* Medicare Advantage star ratings are determined by CMS each year using a standardized 5-star rating system.
- CMS.gov, Medicare Advantage Landscape Source Files — Last accessed May 2, 2026
- CMS.gov, Medicare Part C & D Performance Data — Last accessed May 2, 2026
- CMS.gov, Medicare Advantage & Part D Contract and Enrollment Data — Last accessed May 2, 2026
County-level figures shown on this page, including plan counts, enrollment totals, averages, and percentage distributions, reflect standard Medicare Advantage (MA/MAPD) plans only and are derived from CMS datasets using a standardized aggregation methodology.
Data sources and methodology documentation .
- Medicare.gov, "Compare types of Medicare Advantage Plans" — Last accessed 25 May, 2025
- Medicare.gov, "Your coverage options" — Last accessed 25 May, 2025
- Medicare.gov, "Joining a plan" — Last accessed 25 May, 2025
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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.