Patient Advocacy Without the Call Center
The data layer behind our Massachusetts guide and all 67 city pages, in one place: CMS enrollment, Census demographics, and federal shortage designations, county by county.
Coverage data 2025. Plan networks change - we confirm exactly what your plan covers before any work begins.
Counties covered by our city pages (14 counties, 1,490,627 beneficiaries). Each links to its anchor city page.
| County | Medicare beneficiaries | Medicare Advantage share | Dual-eligible | Residents 65+ | Shortage designations |
|---|---|---|---|---|---|
| Middlesex County | 303,413 | 34.4% | 61,551 | 259,590 | 3 |
| Worcester County | 179,396 | 44.2% | 46,317 | 142,716 | 8 |
| Essex County | 178,983 | 35.4% | 45,629 | 145,373 | 6 |
| Norfolk County | 149,215 | 32.6% | 30,322 | 126,172 | 1 |
| Bristol County | 133,135 | 39.2% | 41,102 | 100,780 | 4 |
| Plymouth County | 129,826 | 31.9% | 25,734 | 102,175 | 2 |
| Suffolk County | 113,803 | 42.4% | 50,561 | 101,416 | 17 |
| Hampden County | 109,452 | 45.4% | 38,154 | 82,518 | 6 |
| Barnstable County | 86,974 | 25.3% | 10,921 | 74,234 | 4 |
| Hampshire County | 39,110 | 31% | 7,774 | 30,271 | 2 |
| Berkshire County | 38,200 | 16.6% | 10,185 | 31,527 | 7 |
| Franklin County | 21,127 | 33% | 5,188 | 16,973 | 3 |
| Dukes County | 5,671 | 9% | 707 | 5,387 | 3 |
| Nantucket County | 2,322 | 6.7% | 201 | 2,217 | 1 |
Statewide, 35.9% of beneficiaries chose Medicare Advantage in 2025, a lower share than most states, so Medigap timing and Part B billing questions come up constantly. Counties above that line see more prior authorizations and more denials worth appealing. Massachusetts is one of the most consumer-friendly Medigap states in the country: it uses its own standardized plans (Core, Supplement 1, and Supplement 1A), it is community-rated so premiums cannot vary by age or health, and it offers continuous guaranteed issue, meaning you can switch supplements year-round with no medical underwriting. About 10.2% of Massachusetts seniors live below the poverty line, the group most likely to qualify for unclaimed help: Prescription Advantage, federal Extra Help, and the Medicare Savings Programs, which MassHealth runs with no asset test. For the full rundown, sources included, see our Massachusetts patient advocacy hub.
One dedicated advocate for the bills, appeals, appointments, and paperwork, serving all 14 Massachusetts counties virtually, usually at $0 with Medicare.
Or start from your city: every Massachusetts city we serve.
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Read moreSources: CMS Medicare Monthly Enrollment (2025); US Census Bureau ACS 2023 5-year; CMS Care Compare Timely & Effective Care (median ER minutes, period ending 09/30/2025); HRSA Health Professional Shortage Area designation file. Data retrieved 2026-08-20. Understood Care is an independent private advocacy service, not a government agency.