Most of the people who selected a plan on HealthCare.gov were consumers who were renewing their coverage.
Of the 1,008,218 people who selected a plan in the first two weeks of enrollment, a total of 761,785 were from renewals. The remaining 246,433 were new customers.
The total tally for the first 12 days of enrollment was 53,000 more than the tally during the same period last year, according to officials.
Nearly 12 million people signed up for coverage from a plan sold on HealthCare.gov or one of the state-run Obamacare exchanges during open enrollment last season.
Enrollment in individual health plans continues through Jan. 31. Under the Affordable Care Act, most Americans must have some form of health coverage — such as through a job, Medicare, Medicaid or an individual plan — during the year or face a potential tax penalty.
That mandate to have coverage is expected to stay in effect through 2017, as it will take time for Trump and the Republican Congress to repeal Obamacare, if that's what they end up doing, and replace it with other provisions, as the president-elect has suggested he will.