With about a month left to sign up for 2017 individual health plans on the federal health insurance marketplace, the U.S. Centers for Medicare and Medicaid Services is announcing increasing sign-ups leading up to the deadline. About one month left to sign up for Obamacare plans With about a month left to sign up for 2017 individual health plans on the federal health insurance marketplace, the U.S. Centers for Medicare and Medicaid Services is announcing increasing sign-ups leading up to the deadline.