The government released the first of what it said would be weekly snapshots of health insurance sign-ups for the PPACA.

The mistake was unacceptable, Burwell said in a memo sent to her senior managers this week.

The disclosure by HHS that it accidentally added 380,000 people in dental plans to enrollment figures under PPACA provided a new opening for critics.

Without the dental plans, the federal government would have had 6.97 million people with medical insurance under PPACA.

U.S. health officials have reported no technical problems thus far, though some state-run insurance exchanges, including Washington and California, had difficulties.

People buying PPACA plans for 2015 can expect to pay about 3 percent more on average for the cheapest coverage a small increase by historical standards though premium changes vary widely by state.

Organizers are bracing for more skepticism and confusion as the second year of enrollment begins this weekend under the Patient Protection and Affordable Care Act.

The preview feature, added to the governments revamped healthcare.gov website, is intended to ease pressure on the system by allowing curious consumers a look at prices for health plans a week before enrollment begins.