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In January, Minneapolis-based UnitedHealthcare (UHC) placed the imaging community on notice by revealing that it will require freestanding outpatient facilities and physician offices that perform a host of diagnostic imaging services to meet accreditation standards-developed by the American College of Radiology (ACR) in Reston, VA, and the more than 22 sponsoring organizations of the Intersocietal Accreditation Commission (IAC)-by March 1, 2008, or forego reimbursement.