Lt. Gov. Anthony Brown gave an update on fixes to the state's health exchange, but could not commit to saying the site would be fixed by the deadline. (Algerina Perna/Baltimore Sun video)

Gov. Martin O'Malley acknowledged for the first time Thursday that he briefly considered delaying the Oct. 1 launch of the state's health insurance exchange when staff members raised concerns about potential problems.

The anticipated glitches turned out to be major problems as the Maryland exchange, designed to provide one-stop shopping for the 800,000 uninsured Marylanders, experienced one of the nation's most troubled launches.

State officials and private contractors have been working to correct the site, and O'Malley said Thursday that three major fixes remain to be done and reiterated that they would be completed by "mid-December."

He declined to set a specific date, but Nina Smith, the governor's spokeswoman, said he considers mid-December to be a window from the 10th to the 20th..

In a pledge akin to one made at the federal level, O'Malley said in November that officials expected to have the exchange running smoothly for most users by mid-December. The work involved fixing nine major problems with the site. He said he expects one to be completed by Monday and the remaining two as soon as possible.

"Is it perfect? No. Is it functional? Yes," the governor said during a news conference.

O'Malley likened the technical fixes to "changing the tires on a moving car, changing the engine on a moving car" and he said that the short-term goal was "not perfection, but functionality."

O'Malley downplayed the significance of the concerns raised before the launch, saying the broad, systemic problems would not have become evident until after the site had gone live.

"At the time, some people said, 'We're worried this, that and the other might not be in place.' We had passed every test. If we hadn't launched, we would have found out now" about the problems, he said. "I've got a six-month window that I wasn't going to piddle away for two months waiting for everyone to be perfectly content that everything was perfect."

The governor and Lt. Gov. Anthony Brown, O'Malley's point man on the Affordable Care Act in Maryland, have begun regular media availabilities to answer questions about fixes to the website and their involvement.

They said they've been getting regular updates from exchange officials on their progress, which aimed to smooth the process for users who have complained about freezing screens, error messages and other problems.

Brown said earlier this week that about 22,000 Marylanders have obtained coverage through the exchange as of Dec. 7. That includes about 5,200 in private plans and about 17,000 low-income adults eligible for Medicaid under an expansion of that program.

O'Malley said the state still aims to sign up 150,000 people in private plans by March 31, the deadline for Americans to enroll or face penalties.

"We have had a rocky first half," the governor said, "but we hope to make up as much as we can in the second half."

Brown also reiterated that the state considers the end of open enrollment as its deadline to get people coverage.

"The end game here is the end of March," Brown said.

The federal site appears largely fixed and enrolling people at a much faster clip. But the state site, while signing people up at a faster rate, is still falling below expectations.

The governor said Thursday that five of the nine problems had been fixed. In another, officials simplified a process. And another problem that created nonsensical responses to whether enrollees could qualify for a health care subsidy was expected to be repaired before Monday.

O'Malley said the remaining issues involve screen freezes that have prevented potential health care enrollees from moving through the site. O'Malley called them "the toughest to get to the bottom of" and said that technicians were expected to start testing possible solutions soon.

The governor said he was hopeful that the state could get the site functional enough to begin aggressively marketing the exchange. The call center still gets overwhelmed by calls, and O'Malley said the state may have to hire more people to deal with them.