(CNSNews.com) – Sen. Charles Grassley (R-Iowa) is asking Dr. Donald Berwick, who now heads the federal Centers for Medicare and Medicaid Services, to disclose any conflicts of interest arising between his new role and his old one as the CEO of the Institute for Healthcare Improvement (IHI).

In a July 29 letter, Grassley -- the ranking Republican on the Senate Finance Committee -- asked Berwick to honor promises he made to Grassley while his nomination was still pending in the Senate. Berwick was recess-appointed by President Obama on July 7 while Congress was on its July 4 break.)

Now that Berwick has been recess-appointed, Grassley wants the doctor – who defends health care rationing and has praised Britain’s government-run National Health Service – to keep his promise and allow the Senate to examine the books of IHI, as well as the list of donors it gave to the Internal Revenue Service...