Under the Medicare Improvements for Patients and Providers Act of 2008 (MIPPA), all Medicare suppliers of the technical component of advanced imaging services have until by January 1, 2012 to become accredited by an accreditation organization designated by the Secretary of Health and Human Services . This includes physicians, non-physician practitioners, and physician and non-physician organizations paid for the technical component of advanced imaging services under the Medicare Physician Fee Schedule. 

Advanced diagnostic imaging procedures include diagnostic magnetic resonance imaging (MRI), computed tomography (CT), and nuclear medicine imaging such as positron emission tomography (PET).

CMS has named the American College of Radiology (ACR), the Intersocietal Accreditation Commission (IAC), and The Joint Commission (TJC) as the accrediting organizations.