Various studies using data from the Oregon experiment found that emergency room visits, outpatient visits, and hospital stays significantly increased with expanded enrollment, as did adherence to prescription medications. But, there were no improvements in rates of cardiovascular disease or high cholesterol.

The experiment, though, did indicate that the expansion helped improve mental health. Miller, Finkelstein, and Baicker predicted that the mental health gains, including significantly lower rates of depression and financial strain, would have had a positive effect on reducing criminal activity, considering the relationship between mental illness and crime.

However, when they correlated Medicaid enrollment data with criminal cases, charges, and convictions over the same study period, the authors found that enrollment made no difference in a person’s likelihood of interacting with the justice system.
https://www.washingtonexaminer.com/policy/healthcare/3261670/medicaid-enrollment-does-not-reduce-crime-rates-data-shows/