Marilyn Tavenner, administrator of the Centers for Medicare and Medicaid Services, pauses while testifying on Capitol Hill in Washington on Tuesday, Oct. 29, 2013, before the House Ways and Means Committee on the implementation of the Affordable Care Act. (AP Photo/J. Scott Applewhite)

Photo by: J. Scott Applewhite

Marilyn Tavenner, administrator of the Centers for Medicare and Medicaid Services, pauses while testifying on Capitol Hill in Washington on Tuesday, Oct. 29, 2013, before the House Ways and Means Committee on the implementation of the Affordable Care Act. (AP Photo/J. Scott Applewhite)