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The challenge of defining and counting generalist physicians: an analysis of Physician Masterfile data.

K Grumbach, S H Becker, E H Osborn and A B Bindman

Institute for Health Policy Studies, University of California-San Francisco 94143-1364, USA.

OBJECTIVES. The study reviewed methods for measuring the specialty distribution of the US physician workforce. It was hypothesized that current databases and measurement conventions overestimate the number of generalist physicians. METHODS. A descriptive analysis of the American Medical Association (AMA) Physician Masterfile for California was done with different assumptions about the definition of generalists based on primary and secondary specialty information. RESULTS. A rigorous definition of generalist physician that excludes physicians with secondary practices in specialist fields resulted in an estimate of generalist physicians 25% lower than the number estimated by conventional workforce evaluation methods. Physicians who reported practicing in both generalist and specialist fields were more likely to be older, to be international medical school graduates, and to be in solo or duo practice compared with physicians who listed only generalist or specialist fields. CONCLUSIONS. The actual number of generalist physicians in the United States may be less than previously believed. Although the exact magnitude of the "hidden system" of specialists providing primary care is difficult to measure, at least a portion appear to already be counted as generalist physicians by current conventions.

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The scope of the data available in the AMA's Physician Masterfile.

K Kenward
AJPH 1996 86: 1481-1482. [PDF]  

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