On January 1, 2010, the State Health Plan joined BlueCross fully insured groups that require certain advanced imaging services be precertified by National Imaging Associates (NIA) when performed and billed in an outpatient or office location. On behalf of BlueCross, NIA handles precertification for certain imaging services. NIA is an independent company. For additional information on this new requirement, review the State Health Plan New Precertification Procedures. Here are National Imaging Associates reference materials: