CMS Medicare enrollment · April 2026
Massachusetts Medicare Enrollment
State and county enrollment from CMS, including Original Medicare, Medicare Advantage and Other Health Plans, and Part D coverage.
Informational only. These enrollment counts do not compare plans or provide medical, financial, or enrollment advice.
Massachusetts enrollment figures
- Total Medicare enrollment
- 1.5M
- Original Medicare
- 968.3K
- MA & Other share
- 35.8%
- Part D coverage
- 83.5%
1,509,192
968,291 beneficiaries
CMS combined delivery-system measure
1,259,957 beneficiaries
County enrollment
15 CMS county rows for Massachusetts. Unavailable values remain marked as not reported rather than estimated.
| County | Total | Original Medicare | MA & Other | MA & Other share | Part D share |
|---|---|---|---|---|---|
| Barnstable County | 87,756 | 66,176 | 21,580 | 24.6% | 83.7% |
| Berkshire County | 38,407 | 31,925 | 6,482 | 16.9% | 85.2% |
| Bristol County | 134,578 | 81,795 | 52,783 | 39.2% | 85.8% |
| Dukes County | 5,722 | 5,182 | 540 | 9.4% | 84% |
| Essex County | 181,514 | 117,285 | 64,229 | 35.4% | 83.6% |
| Franklin County | 21,337 | 14,439 | 6,898 | 32.3% | 84.5% |
| Hampden County | 110,033 | 59,924 | 50,109 | 45.5% | 86.5% |
| Hampshire County | 39,339 | 27,430 | 11,909 | 30.3% | 84.1% |
| Middlesex County | 307,378 | 202,201 | 105,177 | 34.2% | 81.6% |
| Nantucket County | 2,364 | 2,196 | 168 | 7.1% | 81% |
| Norfolk County | 152,118 | 102,626 | 49,492 | 32.5% | 81.7% |
| Plymouth County | 131,669 | 89,585 | 42,084 | 32% | 82.4% |
| Suffolk County | 114,786 | 66,271 | 48,515 | 42.3% | 83.6% |
| Unknown | Not reported | Not reported | Not reported | Not reported | Not reported |
| Worcester County | 182,190 | 101,255 | 80,935 | 44.4% | 84.5% |
Source and interpretation
CMS Medicare Monthly Enrollment, April 2026, published 2026-07-23. “MA & Other” retains the official combined CMS field label.
- CMS suppresses some small counts with an asterisk; suppressed values remain null in this snapshot.
- Medicare Advantage and Other Health Plans is the CMS-published combined measure and is not limited to Medicare Advantage alone.
- Enrollment counts describe a reporting month and do not compare plan benefits, provider networks, quality, or personal costs.