States say ObamaCare exchanges will be ready on time

Officials in six states told GAO they had struggled with the information technology component of setting up an exchange, citing "compressed timeframes and a lack of clear federal requirements."

Some states said they will have to make changes to their computer systems after the exchanges come online. Exchanges also might not be fully integrated right away with other federal programs, such as food stamps and housing vouchers.

The states have triaged their responsibilities to make sure they are able to accept applicants on Oct. 1.

“This report highlights the complexity states face in setting up exchanges and how (the Centers for Medicare and Medicaid Services’) workload will increase dramatically in getting exchanges off the ground," Sen. Charles GrassleyChuck GrassleyTrump turns up heat on AG Sessions over recusal Overnight Cybersecurity: Senate Judiciary reportedly drops Manafort subpoena | Kushner meets with House Intel | House passes Russia sanctions deal | What to watch at 'hacker summer camp' Manafort agrees to speak with investigators after subpoena MORE said in a statement. "The challenges that need to be overcome by October 1, 2013, remain significant.”

The Health and Human Services Department has spent $3.7 billion so far on grants to the 17 states that are setting up their own exchanges. 

The healthcare law provides an unlimited budget for those grants, and HHS has said it expects to have spent $5.7 billion on grants by the end of next year.

HHS cannot use that money, however, to set up a federally run exchange in the 33 states that opted not to build their own marketplaces.