Hospital incident command systems (HICS) were implemented to expand mental and behavioral healthcare (MBHC) services during the COVID-19 pandemic. Data on patient census, nurse vacancies, staff injuries, and staff perceptions were analyzed to quantify issues and track progress toward HICS goals. Data, environment of care, staffing, staff support, staff education, and communication resources were developed. After HICS implementation, 84% of nurses reported confidence in providing care to youth with acute MBHC needs. Nurse leaders should consider HICS for addressing other crises.