 [ Symptoms ] i am retired and on medicare but have a dependent adult over 26 son who lives with me and has no health insurance he has been too ill to work for a couple of years and has no insurance since his cobra ended he has several pre existing conditions south carolina did not expand medicaid and ssissdi turned him down can i buy subsidized insurance for him under the aca i file my income tax as head of household and claim him as i support him totally [ Disease ] you can purchase coverage for your son on the exchange that will take effect on january 1 2014 you can access the exchange at healthcare gov your income will determine if he is eligible for a subsidy