Background: Washington State experienced the first major outbreak of COVID-19 in the United States and despite a significant number of cases, has seen a relatively low death rate per million population compared to other states with major outbreaks and has seen a substantial decrease in the projections for healthcare utilization, i.e. “flattening the curve”. This consensus report seeks to identify the key factors contributing to the effective health system disaster response in western WA. Methods: A multidisciplinary, expert panel including individuals and organizations who were integral to managing the public health and emergency healthcare system response were engaged in a consensus process to identify the key themes and lessons learned and develop recommendations for ongoing management of the COVID-19 pandemic. Results: Six key themes were identified including: early communication and coordination among stakeholders; regional coordination of the healthcare system response; rapid development and access to viral testing; proactive management of long-term care & skilled nursing facilities; proactive management of vulnerable populations; and effective physical distancing in the community. Conclusions: Based on the lessons learned in each of the areas identified by the panel, 11 recommendations are provided to support the healthcare system disaster response in managing future outbreaks.