title: Who provides care to Medicare beneficiaries and what settings do they use?
abstract: BACKGROUND
  Concerns have been expressed that the physician workforce is unprepared for the explosion in the number of older persons in America. As a step toward informing these discussions, this article will describe how Medicare beneficiaries currently access physician services.
  
  
  METHODS
  This study is a descriptive analysis of the physician services used by Medicare beneficiaries. The Medicare Beneficiary Survey (MCBS) data from 1998 are used for the analysis. The locations of service delivery were compared among family physicians, general internists, and geriatricians.
  
  
  RESULTS
  The physician office was the most common site of service, comprising 49% of all provider claims. General internists (20.1% of office claims) and family physicians (18.6% of office claims) were the most common providers. Family physicians spent the largest proportion of their time in the office (77%), general internists were the most likely provider to see patients in the hospital (19%), and geriatricians were the most likely to see patients in the nursing home (27%) and at home (1.7%).
  
  
  CONCLUSIONS
  Office-based care by general internists and family physicians constitute a major infrastructure element in the delivery of care to Medicare beneficiaries. The practices of geriatric medicine physicians are more heavily weighted toward the nursing home setting.
authors.affiliation: Department of Family & Community Medicine, University of California, Davis, Sacramento 95819, USA. george.xakellis@ucdmc.ucdavis.edu
authors.forename: George C
authors.initials: GC
authors.lastname: Xakellis
mesh_terms: D000368:Aged; D005194:Family Practice / Q000706:statistics & numerical data; D005260:Female; D005853:Geriatrics / Q000706:statistics & numerical data; D019538:Health Care Surveys; D006299:Health Services for the Aged / Q000706:statistics & numerical data / Q000600:supply & distribution*; D006760:Hospitalization; D006801:Humans; D007345:Insurance Claim Review; D007388:Internal Medicine / Q000706:statistics & numerical data; D008297:Male; D006278:Medicare / Q000706:statistics & numerical data*; D009735:Nursing Homes; D009819:Office Visits; D011157:Population Dynamics; D011320:Primary Health Care / Q000706:statistics & numerical data*; D011795:Surveys and Questionnaires; D014481:United States