This Mass Fatality Management Guide for Healthcare Entities was created to aid partners in the development of a detailed plan to manage a surge of fatalities. It was constructed to facilitate the creation of a well organized, realistic plan that supports mass fatality surge, to include the clear delineation of the transition from normal to disaster operations. The scope of the Mass Fatality Management Guide for Healthcare Entities includes guidance for hospitals, medical clinics, and SNFs located in Los Angeles County to effectively manage mass fatality operations within their scope as a healthcare partner. This guide includes directions for mass fatality plan development and successful activation, operation, and demobilization strategies for partners within Los Angeles County. As such, the guide seeks to provide a framework for mass fatality management during large-scale disasters (e.g., earthquakes); smaller, more localized incidents (e.g., explosion, shooting); as well as long-term events, (e.g., widespread disease outbreaks). Partners should modify practices identified herein based on the unique attributes of their facility and the availability of local resources. Special consideration has been given to the identification of scalable tiered plan activation requirements; methods and considerations for expedited decedent processing; and coordination with family assistance/information resources (e.g., Family Assistance Centers, and Family Information Centers). The guide development included a robust Project Oversight Group, to include disaster planners for hospitals, medical clinics, and Skilled Nursing Facilities (SNFs); mental/behavioral health; jurisdictional emergency management; law enforcement; and other healthcare providers. The scope of the guide was further enhanced to include lessons learned and best practices from disasters that have occurred.