1. Utilization of radiologic services in different payment systems and patient populations.
2. Anderson CA, Beebe M, Dalton JA, et al.Current procedural terminology: CPT 2002Chicago, Ill: American Medical Association, 2001.
3. Centers for Medicare and Medicaid Services.CMS statistics: Medicare enrollment.Available at:www.cms.hhs.gov/statistics/enrollment.Accessed December 2003.
4. Centers for Medicare and Medicaid Services.Managed care and Medicare Advantage reports, files, and data.Available at:www.cms.hhs.gov/healthplans/reportfilesdata.Accessed September 2003.
5. The Effect of Imaging Guidelines on the Number and Quality of Outpatient Radiographic Examinations