The Implications of Regional Variations in Medicare Spending. Part 1: The Content, Quality, and Accessibility of Care

Figure 4. Utilization is summarized as unadjusted average annual per capita spending on physician services (using standardized
national prices, as described in the Methods section). *Categories defined by using the Berenson–Eggers type of service classification
scheme.
Utilization of physician services across quintiles of spending for the Medicare Current Beneficiary Survey cohort, 1992–1996.
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Ann Intern Med
February 18, 2003
vol. 138
no. 4
273-287