WASHINGTON -- WASHINGTON (AP) — It should be working well by the end of November. That's the Obama administration's rough timetable for completing a long list of fixes to HealthCare.gov, the new, trouble-plagued website for uninsured Americans to get coverage.

Summarizing a week's worth of intensive diagnostics, the administration acknowledged Friday the site has dozens of complex problems and tapped a private company to oversee fixes.

Jeffrey Zients, a management consultant brought in by the White House to assess the extent of problems, told reporters his review found dozens of issues across the entire system. The site is made up of layers of components that are meant to interact in real time with consumers, government agencies and insurance company computers.

It will take a lot of work, but "HealthCare.gov is fixable," Zients declared.

The vast majority of the issues will be resolved by the end of November, he asserted, and there will be many fewer screen freezes. He stopped short of saying problems will completely vanish.

The troubles have been nightmarish for the White House, which had promoted enrollment to be as simple as making a purchase on Amazon.com. This week, President Barack Obama declared himself frustrated by the setbacks while still trumpeting the benefits of the health care law and encouraging consumers to apply by phone if the website proved a hindrance.

In his weekly radio and internet address Saturday, Obama vowed that "in the coming weeks, we are going to get it working as smoothly as it's supposed to." In the meantime, he encouraged the public to call 1-800-318-2596 or visit LocalHelp.HealthCare.gov.

"We're only a few weeks into a six-month open enrollment period, and everyone who wants insurance through the marketplace will get it," he said.

As part of its effort to repair the system, the administration said it is promoting one of the website contractors, a subsidiary of the nation's largest health insurance company, to take on the role of "general contractor" shepherding the fixes.

Quality Software Services Inc. — owned by a unit of UnitedHealth Group— was responsible for two components of the government's online insurance system. One is the data hub, a linchpin that works relatively well, and the other is an accounts registration feature that initially froze and caused many problems.

HealthCare.gov was supposed to be the online portal for uninsured Americans to get coverage under Obama's health care law. Envisioned as the equivalent of Amazon.com for health insurance, it became a huge bottleneck immediately upon launch Oct. 1. The flop turned into an embarrassment for Obama and will likely end up as a case study of how government technology programs can go awry.

The briefing from Zients came a day after executives of QSSI and the other major contractor, CGI Federal, told Congress that the government didn't fully test the system and ordered up last-minute changes that contributed to logjams. Next week, Health and Human Services Secretary Kathleen Sebelius is scheduled to testify.

Visiting a community health center on Friday in Austin, Texas, Sebelius said that "in an ideal world there would have been a lot more testing" but added that her department had little flexibility to postpone the launch against the backdrop of Washington's unforgiving politics. House Republicans trying to defund the nation's health insurance program precipitated a government shutdown.

In the Republican address, Rep. Fred Upton of Michigan, the chairman of the House Energy and Commerce Committee, asked whether the problems evident now foreshadowed future troubles with the health care law.

"In a few short months, families across the country will be subject to penalties under the law's individual mandate," he said. "How can the administration punish innocent Americans by forcing them to buy a product many cannot afford, from a system that does not work?

Zients gave some new details about the extent of the problems, but administration officials are still refusing to release any numbers on how many people have successfully enrolled. Although 700,000 have applied for coverage through the new online markets, it's believed only a fraction of that number actually managed to sign up. Before the website went live, an administration estimate projected nearly 500,000 people would sign up in October alone.

The marketplaces are the gateway to obtaining health insurance under the new health care law, which requires most Americans to have coverage by Jan. 1. Middle-class people who don't have insurance on the job can purchase a private plan with new tax credits to make the premiums more affordable. Low-income people will be steered to an expanded version of Medicaid in states that agree to extend the safety net program.

The federal government is running the insurance markets or taking the lead in 36 states. The rest were set up by states themselves.

Consumers have until Dec. 15 to sign up for coverage to take effect Jan. 1. Under the law, pre-existing medical conditions will no longer be a barrier. But the markets also need lots of young, healthy customers to keep premiums affordable. Open enrollment season extends until Mar. 31.

Zients said almost daily fixes are already having an impact. For example, more than 90 percent of users can now complete one of the first steps, creating an account.

But the application process, which involves submitting and verifying personal information and income details, remains "volatile," he said. At one point, as few as one-third of users were getting through that part.

Zients said there are two big categories of problems. Performance issues involve the speed and reliability of the website. Functional issues are bugs that keep the software from working as intended. Among the high-priority issues is that insurers are getting enrollments with incomplete, incorrect or duplicative information.

___

Online:

Obama's address: http://www.whitehouse.gov

Republican address: http://www.gop.gov

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  • 1912

    Former President Theodore Roosevelt champions national health insurance as he unsuccessfully tries to ride his progressive Bull Moose Party back to the White House. (Photo by Topical Press Agency/Getty Images)

  • 1935

    President Franklin D. Roosevelt favors creating national health insurance amid the Great Depression but decides to push for Social Security first. (Photo by Keystone/Getty Images)

  • 1942

    Roosevelt establishes wage and price controls during World War II. Businesses can't attract workers with higher pay so they compete through added benefits, including health insurance, which grows into a workplace perk. (Photo by Hulton Archive/Getty Images)

  • 1945

    President Harry Truman calls on Congress to create a national insurance program for those who pay voluntary fees. The American Medical Association denounces the idea as "socialized medicine" and it goes nowhere. (Photo by Keystone/Getty Images)

  • 1960

    John F. Kennedy makes health care a major campaign issue but as president can't get a plan for the elderly through Congress. (Photo by Keystone/Getty Images)

  • 1965

    President Lyndon B. Johnson's legendary arm-twisting and a Congress dominated by his fellow Democrats lead to creation of two landmark government health programs: Medicare for the elderly and Medicaid for the poor. (AFP/AFP/Getty Images)

  • 1974

    President Richard Nixon wants to require employers to cover their workers and create federal subsidies to help everyone else buy private insurance. The Watergate scandal intervenes. (Photo by Keystone/Getty Images)

  • 1976

    President Jimmy Carter pushes a mandatory national health plan, but economic recession helps push it aside. (Photo by Central Press/Getty Images)

  • 1986

    President Ronald Reagan signs COBRA, a requirement that employers let former workers stay on the company health plan for 18 months after leaving a job, with workers bearing the cost. (MIKE SARGENT/AFP/Getty Images)

  • 1988

    Congress expands Medicare by adding a prescription drug benefit and catastrophic care coverage. It doesn't last long. Barraged by protests from older Americans upset about paying a tax to finance the additional coverage, Congress repeals the law the next year. (TIM SLOAN/AFP/Getty Images)

  • 1993

    President Bill Clinton puts first lady Hillary Rodham Clinton in charge of developing what becomes a 1,300-page plan for universal coverage. It requires businesses to cover their workers and mandates that everyone have health insurance. The plan meets Republican opposition, divides Democrats and comes under a firestorm of lobbying from businesses and the health care industry. It dies in the Senate. (PAUL J. RICHARDS/AFP/Getty Images)

  • 1997

    Clinton signs bipartisan legislation creating a state-federal program to provide coverage for millions of children in families of modest means whose incomes are too high to qualify for Medicaid. (JAMAL A. WILSON/AFP/Getty Images)

  • 2003

    President George W. Bush persuades Congress to add prescription drug coverage to Medicare in a major expansion of the program for older people. (STEPHEN JAFFE/AFP/Getty Images)

  • 2008

    Hillary Rodham Clinton promotes a sweeping health care plan in her bid for the Democratic presidential nomination. She loses to Obama, who has a less comprehensive plan. (PAUL RICHARDS/AFP/Getty Images)

  • 2009

    President Barack Obama and the Democratic-controlled Congress spend an intense year ironing out legislation to require most companies to cover their workers; mandate that everyone have coverage or pay a fine; require insurance companies to accept all comers, regardless of any pre-existing conditions; and assist people who can't afford insurance. (Alex Wong/Getty Images)

  • 2010

    With no Republican support, Congress passes the measure, designed to extend health care coverage to more than 30 million uninsured people. Republican opponents scorned the law as "Obamacare." (Mark Wilson/Getty Images)

  • 2012

    On a campaign tour in the Midwest, Obama himself embraces the term "Obamacare" and says the law shows "I do care." (BRENDAN SMIALOWSKI/AFP/Getty Images)