In 2013, 65% of health center patients were insured (Figure 3) – 41% by Medicaid, 14% by private insurance, 8% by Medicare, and 2% by other public insurance. By 2015, 76% of health center patients had coverage – an increase of 11 percentage points. About half were covered by Medicaid, 17% by private insurance, 9% by Medicare, and 1% by other public insurance. These increases in coverage coincided with implementation of the ACA insurance expansions, which began January 1, 2014. The increased share of patients with Medicaid reflects the low-income communities served by health centers. The potential for gains in private insurance in these communities is more limited because of the high concentration of poverty and the fact that individuals with income below 100% FPL are not eligible for subsidies to purchase coverage in the ACA marketplaces.