ObamaCare and Medicaid

Federal Poverty level. https://aspe.hhs.gov/2017-poverty-guidelines#threshholds

1.  Non-expansion medicaid state (usually red states)

Income < 100% federal poverty level => Medicaid.

Income > 100% poverty level but < 400% of poverty level => ObamaCare with subsidy

Income > 400% poverty level => Obama Care without subsidy. 

2. In blue states (CA, NY etc)

the 100% federal poverty level is increased to 138% federal poverty level.  

So if your come is < 138% of FPL, you go to medicaid. 

etc. etc.