Some states appear to have more Medicaid participants than they do individuals who meet the program’s income eligibility requirements.

Or so suggests a new study from the National Bureau of Economic Research.

According to the study, an analysis of nine states that expanded their Medicaid program under the Affordable Care Act found 800,000 more Medicaid participants than it did individuals who meet Medicaid’s income eligibility criteria.

The study acknowledges that the actual numbers may not be as great because some people qualify for Medicaid based on disabilities and factors other than income.

Learn more in the National Bureau of Economic Research report “Medicaid Coverage across the Income Distribution under the Affordable Care Act.”