Among the vendors whose ambulatory EHR products received certification were market leaders Allscripts, Cerner Corp., eClinicalWorks LLC, Epic Systems Corp., GE Healthcare, McKesson and Misys Healthcare Systems. Mark Leavitt, chairman of the commission and no relation to the HHS secretary, said that the products were required to meet all of the 250 criteria for ensuring that the tools function as the vendors claim. Although he declined to say whether any products that had been submitted for testing had not met the standards, he said that more than 24 companies had applied for certification. So far, 20 have been certified, but some tests still are under way, Leavitt said.