Medicare Advantage plans in Nantucket, MA, 2027
Nantucket, Massachusetts has 3 Medicare Advantage plans open to everyone for 2027 (4 in 2026) and 2 special needs plans, according to the CMS landscape files; 1 of the open plans have a $0 premium. 3 plans that served the county in 2026 end or leave it, with 69 members living here in September 2026.
What changes in Nantucket for 2027?
| In the county | 2026 | 2027 | Change |
|---|---|---|---|
| Plans open to everyone | 4 | 3 | ▼down 1 |
| Special needs plans | 2 | 2 | no change |
| Plans with a $0 premium | 1 | 1 | no change |
| Plans that lower the Part B premium | 0 | 0 | no change |
| Median out-of-pocket limit | $3,250 | $5,000 | ▲up $1,750 |
Source: CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision); CMS plan benefit package files, 2027 and 2026.
Which plans can anyone in Nantucket join?
| Plan | Premium | Out-of-pocket limit | Part B reduction | 2026 stars |
|---|---|---|---|---|
| Mass General Brigham Advantage CoreH6847-002 · HMO-POS | $0 | $7,150 | none | 4 of 5 |
| Mass General Brigham Advantage SecureH6847-001 · HMO-POS | $60 | $5,000 | none | 4 of 5 |
| Mass General Brigham Advantage PlusH6847-003 · HMO-POS | $180 | $4,500 | none | 4 of 5 |
Source: CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision); CMS plan benefit package files, 2027 and 2026. Stars are the contract's 2026 rating. confirm on Medicare Plan Finder.
Which plans leave Nantucket in 2027?
Members of these plans here choose a 2027 plan during open enrollment, October 15 to December 7, 2026; choosing by December 31 means no gap; because their plan is leaving the county, they can still join until the end of February 2027, with coverage from the first of the next month. Each plan's page says what happens to its members.
| 2026 plan | Members here, Sept. 2026 | For 2027 |
|---|---|---|
| Mass General Brigham AdvantageH9485-001 | 39 | Not offered |
| Mass General Brigham Advantage SignatureH9485-003 | 19 | Not offered |
| Mass General Brigham Advantage PremierH9485-002 | 11 | Not offered |
Source: CMS plan crosswalk from 2026 to 2027 (Oct. 1, 2026); CMS monthly enrollment by plan and by county, September 2026 (CMS hides counts under 11); CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision).
Which special needs plans are sold here?
Open only to people with Medicaid as well as Medicare, with certain chronic conditions, or living in an institution.
| Plan | Who can join | Premium |
|---|---|---|
| Mass General Brigham SCOH0777-001 | Dual-Eligible | $0 |
| Mass General Brigham One CareH1611-001 | Dual-Eligible | $34.70 |
Source: CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision).
How many people in Nantucket use Medicare Advantage?
155 of the county's 2,421 people with Medicare were in a Medicare Advantage plan in September 2026, 6.4%; in Massachusetts as a whole the share is 35.6%.
Source: CMS Medicare Advantage state and county penetration, September 2026.
What else should you check?
- Medicare Advantage in MassachusettsEvery county of the state
- 10 stand-alone drug plans in MassachusettsIf you keep Original Medicare
- Is your plan ending?Every plan not offered in 2027