Differences in the number of services provided by nurse practitioners and physicians during primary care visits

Due to differential training, nurse practitioners (NPs) and physicians may provide different quantities of services to patients.

To assess differences in the number of laboratory, imagining, and procedural services provided by primary care NPs and physicians.

Secondary analysis of 2012-2016 National Ambulatory Medical Care Survey (NAMCS), containing 308 NP-only and 73,099 physician-only patient visits, using multivariable regression and propensity score techniques.

On average, primary care visits with NPs versus physicians were associated with 0.521 fewer laboratory (95% CI -0.849, -0.192), and 0.078 fewer imaging services (95% CI -0.103,-0.052). Visits for routine and preventive care with NPs versus physicians were associated with 1.345 fewer laboratory (95% CI -2.037,-0.654), and 0.086 fewer imaging services (95% CI -0.118,-0.054) on average. Primary care visits for new problems with NPs versus physicians were associated with 0.051 fewer imaging services (95% CI -0.094,-0.007) on average.

NPs provide fewer laboratory and imaging services than physicians during primary care visits.