HHS' Agency for Healthcare Research and Quality released its 2016 National Healthcare Quality and Disparities Report consisting of data from 2014 to 2015. In the report, the agency measured U.S. healthcare quality on a quartile scale.
These 12 states ranked in the lowest quartile for healthcare, ordered alphabetically:
Arkansas
Indiana
Kentucky
Louisiana
Mississippi
Nevada
New Mexico
Oklahoma
Oregon
Texas
West Virginia
Wyoming
Note: U.S. Territory Puerto Rico was included on the chart but was unranked because of missing data.