Obama will be joined during the event by people who have already enrolled in insurance programs through the new exchanges. The administration has not said how many people have enrolled during the first three weeks of sign-ups.
The Health and Human Services Department reported Sunday that it "is bringing in some of the best and brightest from both inside and outside government to ... help improve HealthCare.gov. We're also putting in place tools and processes to aggressively monitor and identify parts of HealthCare.gov where individuals are encountering errors or having difficulty using the site, so we can prioritize and fix them."
Administration officials initially blamed a high volume of interest from ordinary Americans for the frozen screens that many people encountered. Since then, they have also acknowledged problems with software and some elements of the system's design.
The officials said technology experts from inside and outside the government are being brought in to work on the glitches, though they did not say how many workers were being added.
Officials did say staffing has been increased at call centers by about 50 percent. As problems persist on the federally run website, the administration is encouraging more people to sign up for insurance over the phone.
The officials would not discuss the health insurance rollout by name and were granted anonymity.
Despite the widespread problems, the White House has yet to fully explain what went wrong with the online system consumers were supposed to use to sign up for coverage.
Interest in the insurance markets appears to continue to be high. Officials said about 19 million people have visited HealthCare.gov as of Friday night.
Americans seeking health coverage through the legislation must fill out applications before selecting a specific plan. The forms require personal information, including income figures that are used to calculate any subsidies the applicant may qualify for. More than one person can be included on an application.
An internal memo obtained by The Associated Press showed that the administration projected nearly a half million people would enroll for the insurance markets during the first month.
Officials say they expect enrollments to be heavier toward the end of the six-month sign up window.
Problems with the rollout were largely overshadowed by Republican efforts to force changes to the health care law in exchange for funding the government. That effort failed and the government reopened last week with "Obamacare" intact.
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Associated Press writer Ricardo Alonso-Zaldivar contributed to this report.
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Follow Julie Pace at http://twitter.com/jpaceDC