Hospitals in states that chose to take advantage of the Affordable Care Act’s Medicaid expansion option are providing less charity care than hospitals in states that have not expanded their Medicaid programs.
So reports the Colorado Hospital Association after its survey of 465 hospitals in 30 states.
According to the survey, hospitals’ proportion of Medicaid patients increased in states that expanded their Medicaid programs and did not increase in states that did not expand their Medicaid program and uncompensated care fell in states that expanded their Medicaid programs but did not in other states.
Addressing the extent of these changes, the survey found that

The changes seen here are not only distinct, but also substantial. The Medicaid proportion of total charges increased over three percentage points to 18.8 percent in 2014 from 15.3 percent in 2013, representing a 29 percent growth in the volume of Medicaid charges. When compared to the first quarter of 2013, there was a 30 percent drop in average charity care per hospital across expansion states, to $1.9 million from $2.8 million. Similarly, total self-pay charges declined 25 percent in expansion states, bringing its proportion of total charges down to 3.1 percent from 4.7 percent. In contrast, the proportion of Medicare volume shows little variation through first quarter 2014.

Pennsylvania has not yet expanded its Medicaid program but is currently negotiating the terms of doing so with the federal government.
Find the complete Colorado Hospital Association report here.