title: Changes in procedure volume and service provider distribution among radiologists and nonradiologists in dual-energy x-ray absorptiometry between 1996 and 2002.
abstract: OBJECTIVE
  To determine changes in the number of dual-energy x-ray absorptiometry (DEXA) procedures performed in the United States, as well as changes in the relative number of procedures performed by radiologists and nonradiologists.
  
  
  METHODS
  The two major Current Procedural Terminology, Fourth Edition, codes for DEXA scans were selected from the national Medicare Part B databases from 1996 through 2002 (the most recent). The total number of scans done on Medicare patients, as well as the percentages performed by radiologists and nonradiologists, were tabulated.
  
  
  RESULTS
  In 1996, a total of 501,505 DEXA scans were performed among all Medicare patients. Of these, 30% were performed by radiologists. In 2002, there were 2,195,548 DEXA scans performed among all Medicare patients, of which radiologists performed 45%.
  
  
  CONCLUSIONS
  Between 1996 and 2002, the number of DEXA scans performed on all Medicare patients increased by more than fourfold. In the same population, the percentage of scans performed by radiologists increased from less than one-third to almost one-half. Consequently, radiologists are steadily gaining market share of this procedure in the Medicare population.
authors.affiliation: Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania 19107, USA. charles.intenzo@jefferson.edu
authors.forename: Charles M
authors.initials: CM
authors.lastname: Intenzo
authors.forename: Laurence
authors.initials: L
authors.lastname: Parker
authors.forename: Vijay M
authors.initials: VM
authors.lastname: Rao
authors.forename: David C
authors.initials: DC
authors.lastname: Levin
mesh_terms: D015502:Absorptiometry, Photon / Q000706:statistics & numerical data / Q000639:trends*; D006282:Health Personnel / Q000706:statistics & numerical data; D006801:Humans; D011871:Radiology / Q000639:trends*; D014481:United States