Systematic review addressing nurse practitioner reimbursement policy: Part one of a four-part series on critical topics identified by the 2015 nurse practitioner research agenda.

Background And Purpose: The growth and sustainability of nurse practitioners (NPs) requires transparent, fair and equitable reimbursement policies. Complicating this issue is variation in reimbursement policy within and across federal, state, and other payers. Even with explicit regulations, there remain questions on how reimbursement policies are covertly operationalized in practice. This systematic review aims to identify knowledge gaps related to reimbursement policy issues and outlines recommendations for further research.

Methods: Eight major databases were searched using terms including "nurse practitioner," "reimbursement," "policy," and "research," limited to the United States and inclusive of December 2006-September 2017. Articles meeting the inclusion criteria were analyzed for themes and gaps.

Conclusion: The final review includes 17 articles identifying themes including state-determined Medicaid reimbursement and scope of practice legislation shapes NP clinical practice; NPs as identified primary care providers: credentialing and contracting; reimbursement parity; and "incident to" billing. Moreover, there is evidence of discriminatory policies that disadvantage NPs and limit their access to patients, direct billing, and direct reimbursement.

Implications For Practice: Future research needs to focus on outcomes of discriminatory, as well as supportive, reimbursement policies in organizations, and their influence on patient access and quality care.