151.0 per 100K
662:1 · 603 providers
New Jersey 106.8 · US 119.6
Medicare-enrolled: 57% (CMS Doctors & Clinicians, August 2026)
HRSA AHRF benchmark: 373 (2023 data, AHRF 2024-2025)
Find primary care physicians in Mercer County →Ltrl Health Data
Mercer County, NJ
Healthcare providers per resident, insurance coverage and preventive care, with state and US comparisons.
Population 399,289 (Census, 2025)Provider data: NPPES, September 2026FIPS 34021
Healthcare providers
Dentists
86.2 per 100K
1,161:1 · 344 providers
New Jersey 91.9 · US 80.5
Medicare-enrolled: 1% (CMS Doctors & Clinicians, August 2026)
HRSA AHRF benchmark: 319 (2024 data, AHRF 2024-2025)
Find dentists in Mercer County →Mental health providers
447.3 per 100K
224:1 · 1,786 providers
New Jersey 372.2 · US 396.3
Medicare-enrolled: 20% (CMS Doctors & Clinicians, August 2026)
Find mental health providers in Mercer County →Other primary care providers
152.8 per 100K
655:1 · 610 providers
New Jersey 130.7 · US 169.7
Medicare-enrolled: 58% (CMS Doctors & Clinicians, August 2026)
Find other primary care providers in Mercer County →Primary care physicians
| Measure | Providers | Per 100,000 | Residents per provider | New Jersey | US | Trend |
|---|---|---|---|---|---|---|
| Dentists Medicare-enrolled: 1% (CMS Doctors & Clinicians, August 2026) HRSA AHRF benchmark: 319 (2024 data, AHRF 2024-2025) Find dentists in Mercer County → | 344 | 86.2 | 1,161:1 | 91.9 | 80.5 | |
| Mental health providers Medicare-enrolled: 20% (CMS Doctors & Clinicians, August 2026) Find mental health providers in Mercer County → | 1,786 | 447.3 | 224:1 | 372.2 | 396.3 | |
| Other primary care providers Medicare-enrolled: 58% (CMS Doctors & Clinicians, August 2026) Find other primary care providers in Mercer County → | 610 | 152.8 | 655:1 | 130.7 | 169.7 | |
| Primary care physicians Medicare-enrolled: 57% (CMS Doctors & Clinicians, August 2026) HRSA AHRF benchmark: 373 (2023 data, AHRF 2024-2025) Find primary care physicians in Mercer County → | 603 | 151.0 | 662:1 | 106.8 | 119.6 |
Trend: June 2021 to September 2026. State and US figures are pooled (total providers ÷ total population) for the same period.
Coverage and preventive care
Flu vaccinations54.0%
New Jersey 50.0% · US 44.0% · CMS Office of Minority Health, Mapping Medicare Disparities Tool, 2023
New Jersey 35.0% · US 36.0% · CMS Office of Minority Health, Mapping Medicare Disparities Tool, 2023
New Jersey 3,143 · US 2,769 · CMS Office of Minority Health, Mapping Medicare Disparities Tool, 2023
New Jersey 9.0% · US — · U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE), 2024
New Jersey 10.7% · US — · U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE), 2024
New Jersey 4.5% · US — · U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE), 2024
| Measure | Mercer County | New Jersey | US | Source |
|---|---|---|---|---|
| Flu vaccinations | 54.0% | 50.0% | 44.0% | CMS Office of Minority Health, Mapping Medicare Disparities Tool, 2023 |
| Mammography screening | 35.0% | 35.0% | 36.0% | CMS Office of Minority Health, Mapping Medicare Disparities Tool, 2023 |
| Preventable hospital stays | 3,069 | 3,143 | 2,769 | CMS Office of Minority Health, Mapping Medicare Disparities Tool, 2023 |
| Uninsured (under 65) | 9.4% | 9.0% | — | U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE), 2024 |
| Uninsured adults (18–64) | 11.2% | 10.7% | — | U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE), 2024 |
| Uninsured children (under 19) | 4.5% | 4.5% | — | U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE), 2024 |
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Ltrl Health Data. Mercer County, NJ: healthcare providers and access. Data as of September 2026. https://ltrl.com/research/workforce/new-jersey/mercer-county
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Registered, not necessarily practicing. Provider counts come from the national provider registry (NPPES): active individual clinicians, counted once under their primary specialty at their practice-location county. Some registered clinicians are retired or see few patients. Counts under 10, or places with fewer than 10,000 residents, are flagged and left out of rankings. Nothing is estimated or imputed. Methodology
Sources: NPPES (CMS), September 2026; Census population estimates; Census SAHIE; CMS Mapping Medicare Disparities. Ltrl is not affiliated with County Health Rankings & Roadmaps.