Federal investment in emergency preparedness has increased notably since the 9/11 attacks, yet it is unclear if and how US hospital readiness has changed in the 20 years since then. In particular, understanding effective aspects of hospital emergency management programs is essential to improve healthcare systems’ readiness for future disasters. The authors of this article examined the state of US hospital emergency management, focusing on the following question: During the COVID-19 pandemic, what aspects of hospital emergency management, including program components and organizational characteristics, were most effective in supporting and improving emergency preparedness and response? We conducted semistructured interviews of emergency managers and leaders at 12 urban and rural hospitals across the country. Through qualitative analysis of content derived from examination of transcripts from our interviews, we identified 7 dimensions of effective healthcare emergency management: (1) identify capable leaders; (2) assure robust institutional support; (3) design effective, tiered communications systems; (4) embrace the hospital incident command system to delineate roles and responsibilities; (5) actively promote collaboration and team building; (6) appreciate the necessity of training and exercises; and (7) balance structure and flexibility. These dimensions represent the unique and critical intersection of organizational factors and emergency management program characteristics at the core of hospital emergency preparedness and response. Extending these findings, we provide several recommendations for hospitals to better develop and sustain what we call a response culture in supporting effective emergency management.