Monday is the final day to sign up for health coverage, avoiding a tax penalty. But so far, the official website has frozen up twice, locking out those trying to sign up last-minute.
White House spokesman Jay Carney says a tech team is working on it.
“There are currently 100,000 people on the system who are enrolling and there is no problem for them to enroll,” says Carney.
1.2 million people had visited healthcare.gov as of noon.
Earlier Monday, people trying to log on were told the site was "currently unavailable." The website was brought back online for several hours before locking people out a second time.
The issue only affects those trying to create new accounts. People with existing accounts can continue to work on their applications.
Online issues may be sending more people to local insurance providers.
In Omaha, employees at Blue Cross and Blue Shield of Nebraska were also busier than usual. Company spokesman Andy Williams said Monday that a waiting area for customers was filling up fast.
The White House says they are on track to sign up roughly 6.5 million people through federal and state online marketplaces. That lands right in the middle of their $6 million revised goal, and their original goal of $7 million.