Opioid Prescribing by Nurse Practitioners in Medicare Part D: Impact of State Scope of Practice Legislation.

Many state legislatures restrict nurse practitioner (NP) scope of practice as a way of addressing patient safety concerns. The purpose of this study was to investigate the influence of state NP scope of practice laws on the prescription of oxycodone and hydrocodone containing medications by NP and MD/DO/PA prescribers to Medicare Part D beneficiaries. Using the Medicare Part D public use file, we analyzed oxycodone and hydrocodone containing prescriptions per Medicare Part D beneficiary by prescriber type, NP state scope of practice, and geographic variables. Our results demonstrate that the state scope of practice variable had the same effect, in identical direction and significance, on NP opioid prescribing patterns as it had on MD/DO/PA prescribers, a group to whom NP scope of practice laws do not apply. Thus, scope of practice in this study was not an exclusive predictor of NP practice and prescribing.