title: Forecasting the need for physicians in the United States: the Health Resources and Services Administration's physician requirements model.
abstract: OBJECTIVE
  The Health Resources and Services Administration's Bureau of Health Professions developed a demographic utilization-based model of physician specialty requirements to explore the consequences of a broad range of scenarios pertaining to the nation's health care delivery system on need for physicians.
  
  
  METHODS
  The model uses selected data primarily from the National Center for Health Statistics, the American Medical Association, and the U.S. Bureau of Census. Forecasts are national estimates.
  
  
  METHODS
  Current (1989) utilization rates for ambulatory and inpatient medical specialty services were obtained for the population according to age, gender, race/ethnicity, and insurance status. These rates are used to estimate specialty-specific total service utilization expressed in patient care minutes for future populations and converted to physician requirements by applying per-physician productivity estimates.
  
  
  METHODS
  Secondary data were analyzed and put into matrixes for use in the mainframe computer-based model. Several missing data points, e.g., for HMO-enrolled populations, were extrapolated from available data by the project's contractor.
  
  
  RESULTS
  The authors contend that the Bureau's demographic utilization model represents improvements over other data-driven methodologies that rely on staffing ratios and similar supply-determined bases for estimating requirements. The model's distinct utility rests in offering national-level physician specialty requirements forecasts.
authors.affiliation: Department of Health and Human Services, Bureau of Health Professions, Rockville, MD 20857, USA.
authors.forename: L
authors.initials: L
authors.lastname: Greenberg
authors.forename: J M
authors.initials: JM
authors.lastname: Cultice
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003710:Demography; D005194:Family Practice / Q000639:trends; D005260:Female; D005544:Forecasting; D006301:Health Services Needs and Demand / Q000706:statistics & numerical data / Q000639:trends*; D006302:Health Services Research; D006280:Health Workforce; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008329:Managed Care Programs; D008511:Medicine / Q000639:trends; D008875:Middle Aged; D015233:Models, Statistical; D010820:Physicians / Q000706:statistics & numerical data / Q000600:supply & distribution*; D015203:Reproducibility of Results; D013038:Specialization; D014481:United States; D014488:United States Health Resources and Services Administration