The 2014 OIG Work Plan includes the following: 

Policies and Practices. We will determine the impact of subordinate facilities in hospitals billing Medicare as being hospital based (provider based) and the extent to which such facilities meet CMS’s criteria. Context—Provider-based status allows a subordinate facility to bill as part of the main provider. Provider-based status

The 2014 OIG Work Plan includes the following:

Quality of Care and Safety. We will determine how hospitals assess medical staff candidates prior to granting initial privileges, including verification of credentials and review of the National Practitioner Databank. Context—Hospitals that participate in Medicare must have an organized medical staff that periodically appraises its members (42