Callers to the HealthCare.gov service center on Saturday morning got a recorded message saying "don't worry" — if they'd called and left their phone number before the deadline, they'll get a call back and still can enroll for 2018.
HealthCare.gov issued similar extensions previously under the Obama administration. Although the deadline has passed for most consumers in the 39 states served by HealthCare.gov, several states running their own enrollment websites have longer deadlines.
Also, longer sign-up periods are available on HealthCare.gov for people in special circumstances, including those affected by this year's hurricanes. The HealthCare.gov call center is at 800-318-2596.