15 Minutes ’til 50 Patients: A 2016 Model That Still Sets the Standard for MCI Readiness

In early exercises at two California hospitals, staff raced across campus to gather equipment and open surge areas after a mass‑casualty notification. It took them up to an hour to get organized, long after the first patients would have arrived. That gap between plan and performance became the catalyst for a simple but powerful idea: hospitals must be ready to receive at least 50 patients within 15 minutes of notification.

From that insight, the “15 Minutes ‘til 50 Patients” programme was born. Developed in 2016 by emergency management and ED teams at Providence Little Company of Mary Medical Center Torrance and Henry Mayo Newhall Memorial Hospital, under the leadership of Christopher Riccardi and Bradford Baldridge, MD, it was designed to close exactly that gap.

The model is deliberately simple, practical, and free: a written mass casualty incident (MCI) response plan that other hospitals can adapt with minimal effort. “Find‑and‑replace. Put your hospital name here, and you’re good to go.” Today, an estimated 600+ hospitals across the United States use some version of this approach, and it continues to be promoted in 2026 as a benchmark for MCI readiness.

The core idea: be ready before the patients arrive

The model is built around four essential elements that every hospital needs in a surge:

• Staff – people must know exactly where to go and what to do.

• Stuff – supplies and equipment must be ready to deploy immediately.

• Space – an additional area must be able to absorb a sudden influx of patients.

• Systems – roles, communication, and processes must tie everything together.

Hospitals pre‑define:

• Where a surge treatment area will be established (often outside the ED).

• What equipment and supplies are needed and where they are stored.

• Which departments and roles are responsible for what when a disaster is declared.

When an incident is triggered, leadership activates a command centre; pharmacy, radiology, laboratory, blood bank, trauma teams, chaplains, case managers and others move into predefined roles. The existing ED keeps functioning; the new “ED surge unit” handles the influx under clear guidance. The aim: keep the chaos outside and manage patient throughput under control.

The programme has been stress‑tested in more than 150 drills, typically simulating at least 100 patients. As the developer puts it: “The only way to test the system is to stress the system.” Over time, the model has proved scalable, from children’s hospitals and trauma centres to community hospitals, health centres and long‑term care facilities.

An important addition in paediatric settings is family reunification. In Orange County, California, all 28 school districts and 26 hospitals participate in a coordinated effort that uses school nurses to help identify students, access emergency contacts, and reconnect children with families after an incident.

What this means for hospital leaders

There are two points that stand out for hospitals working on emergency preparedness:

1. Simple, reusable templates can spread quickly if they are practical and free.
   The “15 ’til 50” model is not exotic. It is a clear, written plan with job action sheets, department responsibilities, and implementation guidance that can be adapted to local staffing patterns, physical layout, and legal frameworks. That simplicity is precisely why it has been adopted so widely.

2. The real question is not whether there is a plan, but whether it works in the first 15 minutes.
   If an emergency department received a call that 40–60 casualties would arrive within 20 minutes, what exactly would happen in those first 15 minutes?

   • Who decides to open a surge area, and where is it?

   • Which staff are called, and how are they notified?

   • What equipment is moved, by whom, and from where?

   • How is command established, and how is information shared across departments?

If the answers are vague, or if this sequence has never been tested under pressure, the plan may look good on paper but fail when it the actual situation happems.

At (Be) Ready, we often see hospitals with detailed contingency plans that have never been tested in a realistic, time‑constrained scenario. Our work focuses on turning those documents into operational routines: clarifying roles, pre‑positioning resources, designing simple job action sheets, and then stress‑testing the system through tabletop and functional exercises that mirror the intensity of a real incident.

The “15 Minutes ’til 50 Patients” model is a strong example of how a focused, practical approach can raise baseline readiness across many institutions. The challenge for each hospital is to adapt such models to its own context and then drill them until the first 15 minutes run on autopilot.