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Provider Distribution Changes in Dual-Energy X-Ray Absorptiometry in the Medicare Population Over the Past Decade
Charles M Intenzo1, Laurence Parker1, David C Levin1
1Department of Radiology, Thomas Jefferson University, Philadelphia, PA, USA.
Summary
Radiologists are increasingly performing dual-energy X-ray absorptiometry (DXA) scans for Medicare patients, gaining market share from nonimaging specialists. Despite an overall decline in DXA utilization, radiologists now significantly lead in performing these bone density tests.
Area of Science:
- Radiology
- Medical Imaging
- Health Services Research
Background:
- Dual-energy X-ray absorptiometry (DXA) is a key imaging procedure for bone density assessment.
- Both radiologists and nonimaging physicians perform DXA scans in the United States.
- The Medicare population is the primary demographic for DXA imaging.
Purpose of the Study:
- To compare the distribution of DXA scan providers between radiologists and nonimaging physicians.
- To analyze trends in DXA utilization and provider market share within the Medicare population from 2003 to 2013.
Main Methods:
- Utilized Current Procedural Terminology, Fourth Edition (CPT) codes for DXA scans.
- Obtained data from the CMS Physician Supplier Procedure Summary Master Files (2003-2013).
- Tabulated DXA procedure volumes and calculated utilization rates for radiologists and nonradiologists.
Main Results:
- Total DXA scans for Medicare patients decreased by 2% between 2003 and 2013.
- Radiologist-performed DXA scans increased by 25% during the study period.
- Nonimaging specialists experienced a corresponding decline in DXA utilization, losing market share to radiologists.
Conclusions:
- Radiologists have significantly increased their market share in performing DXA scans on Medicare patients.
- Despite a slight overall decrease in DXA utilization, radiologists now substantially lead in this imaging area.
- The trend indicates a shift in DXA performance towards specialized radiology providers within the Medicare system.
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