Patient Advocacy Without the Call Center
The data layer behind our Maryland guide and all 60 city pages, in one place: CMS enrollment, Census demographics, and federal shortage designations, county by county.
Coverage data 2023. Plan networks change - we confirm exactly what your plan covers before any work begins.
Counties covered by our city pages (24 county-equivalents, 1,175,939 beneficiaries). Each links to its anchor city page.
| County | Medicare beneficiaries | Medicare Advantage share | Dual-eligible | Residents 65+ | Shortage designations |
|---|---|---|---|---|---|
| Montgomery County | 194,919 | 23.2% | 23,079 | 175,080 | 5 |
| Baltimore County | 172,866 | 26.2% | 22,976 | 150,859 | 3 |
| Prince George's County | 152,516 | 32.3% | 19,487 | 138,054 | 4 |
| Anne Arundel County | 107,973 | 20.6% | 9,206 | 91,932 | 1 |
| Baltimore city | 103,071 | 37.3% | 31,357 | 86,161 | 19 |
| Howard County | 57,628 | 20.3% | 6,047 | 49,360 | 0 |
| Harford County | 55,933 | 24.8% | 5,176 | 44,548 | 1 |
| Frederick County | 52,499 | 20.7% | 4,772 | 42,039 | 2 |
| Carroll County | 37,730 | 20.3% | 2,905 | 30,667 | 1 |
| Washington County | 33,887 | 25% | 5,308 | 27,598 | 3 |
| Charles County | 28,788 | 25.8% | 3,232 | 22,108 | 1 |
| Wicomico County | 21,933 | 26.4% | 3,762 | 16,868 | 2 |
| Cecil County | 21,790 | 21.7% | 2,720 | 17,411 | 2 |
| St. Mary's County | 19,820 | 18.1% | 2,309 | 15,711 | 1 |
| Calvert County | 19,018 | 15.9% | 1,615 | 14,914 | 1 |
| Allegany County | 17,350 | 17.8% | 3,380 | 14,200 | 2 |
| Worcester County | 17,023 | 25.2% | 1,639 | 15,019 | 1 |
| Queen Anne's County | 12,859 | 17.3% | 883 | 10,311 | 1 |
| Talbot County | 12,314 | 15.6% | 1,106 | 11,060 | 0 |
| Dorchester County | 8,939 | 25.6% | 1,720 | 7,354 | 1 |
| Garrett County | 7,741 | 23.2% | 1,152 | 6,790 | 2 |
| Caroline County | 7,464 | 23.1% | 1,244 | 5,719 | 2 |
| Kent County | 6,414 | 17.4% | 680 | 5,178 | 1 |
| Somerset County | 5,464 | 29.2% | 1,161 | 4,278 | 1 |
Statewide, 25.3% 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. Maryland is one of a handful of states with a Medigap birthday rule: for the 30 days starting on your birthday each year, you can switch to a plan with equal or lesser benefits, from any insurer, with no medical underwriting (effective July 1, 2023), and the state also requires insurers that sell Plan A to people 65+ to offer it to under-65 disabled beneficiaries on a guaranteed-issue basis. About 9% of Maryland seniors live below the poverty line, the group most likely to qualify for unclaimed help: the SPDAP drug-premium subsidy, federal Extra Help, and the Medicare Savings Programs, which the Maryland Department of Health runs with income and asset limits. For the full rundown, sources included, see our Maryland patient advocacy hub.
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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.