A few years back I posted an entry which breaks out the income eligibility thresholds for Medicaid and CHIP in every state. I've reposted an updated version below, which also takes into account Basic Health Plan (BHP) eligibility in Minnesota and New York. This comes directly from the Centers for Medicare & Medicaid. Note the footnotes at the bottom. The pink cells on the right indicate that the state has not yet expanded Medicaid under the ACA (Maine and Virginia have passed but note implemented doing so, while Medicaid expansion is on the ballot in Idaho, Nebraska and Utah this November).
As a reminder, here's the 2018 Federal Poverty Level income chart for every state except Alaska and Hawaii (Alaska is 25% higher, Hawaii is 15% higher):