Table 2.

Factors Used in Estimating the Productivity of Providers Who Were Missing Productivity Data

	Median Visits (M in Equation (2))		% in Generalist Specialties (p in Equation (2))
	Rural	Urban	Rural	Urban	% Active (a in equations (2))
Family physicians	80	72	32.1*	17.1*	94.7
General internists	55	60	9.7*	9.7*	94.7
General pediatricians	83	75	5.3*	5.3*	94.7
Nurse practitioners	58	45	37.8	31.1	98.1
Physician assistants	70	75	71.2	54.7	95.4

^*For MDs with no known specialty data only. Those MDs with known generalist specialty but no productivity information are assumed to be 100 percent generalists.