To evaluate content validity and interrater reliability for acuity tools developed for the antepartum and neonatal intensive care unit (NICU) patient population. Study Design and Methods: Antepartum and NICU acuity tools were developed to better evaluate nurse staffi ng assignment equity and patient needs. Following several iterations with staff nurses and nurse leaders, content validity of the acuity tools was established via a panel of experts in each substantive area using the Content Validity Index. The fi nal tools were then evaluated for interrater reliability using Intraclass Correlation. Results: Content validity for the Antepartum Acuity Tool was S-CVI/Ave = 0.87 and for the NICU Acuity Tool was S-CVI/ Ave = 0.98. Interrater Reliability for the Antepartum Acuity tool was ICC = 0.88, and the NICU Acuity Tool was ICC = 0.95. Clinical Implications: These tools have established content validity and interrater reliability and are appropriate for use in the antepartum and NICU settings to determine patient acuity and promote appropriate nurse-to-patient assignments.