Alden: Whereabouts in are you from? gabapentin 800 mg Twelve percent of the uninsured knew that the marketplaces would open on Oct. 1, just three days from now. An additional 14 percent guessed that it would start sometime in 2013 or 2014. The majority, though -- and this held true for the general population as well -- just didn't know when the programs kick in, or declined to guess.