Nurse practitioner patient care patterns and practice characteristics : understanding the role of state scope-of-practice policies

Abstract

Introduction: The U.S. is faced with a primary care (PC) workforce shortage; an estimated 43 percent of the population has unmet health care needs and 18.2 percent of the adult population lacks a usual source of care (USC) provider. The workforce shortage limits even those with a USC from receiving the full scope of recommended clinical services. One promising solution is reforming scope-of-practice (SOP) policies for PC nurse practitioners (NPs). Objectives: The primary objective of this dissertation was to assess the impact of NP SOP policy implementation on NP practice patterns and patient access to PC by evaluating NP time spent delivering patient care, NP role as USC providers, patient travel times, and appointment availability. Methods: The studies discussed in this dissertation leveraged cross-sectional data from the National Sample Survey of Nurse Practitioners (NSSNP), time-series data from the Medical Expenditure Panel Survey (MEPS), and the Nurse Practitioner Professional Practice Index (NPPPI) to quantify variations in state policy environments. We used generalized mixed effects models to examine relationships in the cross-sectional data analyses and two-way fixed effect models to evaluate longitudinal data. Results: Our analyses revealed several key findings: NP SOP policies do impact the percentage of time NPs spend providing direct patient care; the NP workforce role as USC providers has increased as SOP policies have changed; states with supportive reimbursement policies have more NPs working as USC providers; and states with fewer NP supervision requirements have shorter patient travel times to USC providers. Conclusion: The U.S. health care system must continue to evolve to address the growing demand for PC services. While strategies to increase the supply of PC providers may be an effective long-term solution, our findings suggest that NP SOP reform may be a viable and complementary strategy to increasing the capacity of the PC workforce, providing more immediate relief.