Michelle Snyder, chief operating officer at the agency, will step down after staying on a year longer than she intended to assist with the rollout of healthcare.gov, the federal portal for health insurance, the Hill reported Monday.
Snyder was named by contractors in testimony before a congressional panel as a key figure responsible for forging ahead with the Oct. 1 launch of the website, despite signs the system hadn't been adequately tested.
Officials from the Department of Health and Human Services and CMS disputed that scenario, saying the contractors were to blame for website problems.
Republican and some Democratic lawmakers had called on the Obama administration to clean house at the Health and Human Services agency because of the botched launch.
Snyder is the second CMS official to leave, although no one has been fired, the Hill said. In November, Tony Trenkle, who was the chief information officer for CMS, announced he was leaving the agency for the private sector.