because your parents have green card, your best option to get them health insurance is through the Medicaid program. only caveat would be, the program is disigned for low income folks. so you need a way to show at least one of your parents are generating income through employment. in the past i have "hired" my mom as domestic helper and no problem getthing them qualified for medicad. the the small amount i paid her, i actually got a tax right off....i know right, only in america :)

with the growing number of nepali parents obtaining green card through the citizenship status of their children, medicaid is the way to go if they aren't over 65 and qualify for medicare. it is such a peace of mind to know that your parents have medical care if/when needed.

good luck to you and let me know if you have any additional questions.