The federal government is due to pay at least 20 contractors more than their original estimates for work on HealthCare.gov and the rollout of ObamaCare, according to an official review released Tuesday. The Department of Health and Human Services inspector general (IG) found that federal contracts on the rollout exceeded $1.7 billion in value. Seven companies are due to receive more than double their initial estimates, the IG report stated. The government was obligated to pay nearly $800 million for 60 contracts related to the federal marketplace as of February 2014. By that time, it had spent nearly $500 million.