RENEE MONTAGNE, HOST:
Please wait. That's the message millions of Americans got when they tried to shop for health coverage on the federal government's new health insurance website. A series of technological glitches, delays, and crashes kept people from getting to state exchanges, as well.
NPR's Elise Hu reports.
ELISE HU, BYLINE: When Texas insurance agent Travis Middleton tried to log onto healthcare.gov, the new federal site to enroll in health coverage, this is what he encountered.
TRAVIS MIDDLETON: Please wait. We have a lot of visitors on our site right now...
HU: So he waited.
MIDDLETON: (Singing) Doo-doo-doodle-loo-loo, doo, doo doo, doo-doo-doodle-loo-loo...
Uh, just refreshed and we still got the same website note.
HU: He's not alone. The technological system powering the new health care marketplace is the first its kind like this. Nothing similar exists anywhere in the world.
FRANK FEBBRARO: Systems of this scale are very difficult. You know, Facebook wasn't built in a day.
HU: Frank Febbraro is the Chief Technology Officer for the company Phase 2 Technology. He's not working on the marketplace but he's built systems before - for the White House and Homeland Security. Febbraro says this exchange system is particularly hard because it has to fetch data from so many agencies, to find out which plans and tax credits consumers qualify for.
FEBBRARO: So when you have so many people hitting the site all at the same time, each asking a request that is basically unique, you require a lot of horsepower to process all of that for each individual.
HU: So what all's involved: A few things at once. Sixteen states built their own insurance exchange sites. The federal government is running its HealthCare.gov site for states without their own exchanges. And programmers created a massive federal data hub. That hub is the system that computers talk to, to link up with agencies like the IRS, Social Security, and Homeland Security to verify who you are and your income as you sign up for coverage. All of that needs to happen within seconds.
FEBBRARO: It also takes a long time to answer that request. So things start to stack up pretty quick.
HU: But like the Texan, Travis Middleton, a lot of folks didn't even get that far.
MIDDLETON: Ah, we're still blocked out. We can't even log-in at this point.
HU: The system was swamped and the administration blames high traffic for the long wait times and crashes. Marilyn Tavenner heads the agency overseeing the exchange system.
MARILYN TAVENNER: So we did two things. We added capacity and we made some adjustments to the system to handle that. And I think you'll find it much improved today.
HU: But most of the real work of this is in the hands of contracted computer programmers. Frank Febbraro, the tech officer with government experience, says the coders are likely working around the clock.
FEBBRARO: It's such a difficult time. Especially, you know, if you're involved building these systems and the cars screaming down the high way and there's pieces falling off of it. It's really tempting to panic and start making lots of changes and hopes. And the only thing I could recommend is to be calm.
HU: That's the message from the government, too.
TAVENNER: We're in a marathon, not a sprint, and we need your help.
HU: You have until end of March 2014 to enroll. The agency says the sites should be running more smoothly between now and then. Elise Hu, NPR News.