Medicare and Medicaid chief Dr. Mark McClellan intends to resign, The Dallas Morning News reported Sunday. An announcement could come as early as Tuesday, the paper reported.

McClellan, a physician and economist, was one of President Bush's economic advisers and served as the Food and Drug Administration commissioner before he was tapped in 2004 to administer the government's health programs for the elderly and impoverished.

Christina Pearson, a spokeswoman for the Health and Human Services Department, had no comment on the report when contacted Sunday by The Associated Press. McClellan's personal spokesman, Jeff Nelligan, told the AP that he had not heard that McClellan would be resigning and said that rumors of such changes were common.

McClellan holds a medical degree from the Harvard-Massachusetts Institute of Technology Division of Health Sciences and Technology and a Ph.D. in economics from MIT.

Stepping down will allow him to spend more time with his wife and young twin daughters, though he will probably pursue work in academia or the private sector, the Morning News reported.

McClellan is former White House press secretary Scott McClellan's older brother. His mother, Carole Keeton Strayhorn, is the Texas comptroller and is running for governor as an independent.