Tech experts unaffiliated with the site have told CNNMoney there appear to be a variety of hardware, software and security issues with the site.
"From what I can tell as an outsider, it's engineering fundamentals they're getting wrong," said Robin Purohit, CEO of the technology firm Clustrix.
"I think its reasonable to stabilize the patient" by the late-November deadline Health Secretary Kathleen Sebelius set for completion, he added. "Whether it's going to be a pleasant and glitch free experience, I doubt that."
Sebelius said over $174 million has been spent on the site and said she should be held "accountable for the debacle."