Written and maintained by CASRAI Editorial Board
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General information only, not medical or operational advice.
Short answer: what is a DMAT?
A Disaster Medical Assistance Team (DMAT) is a federal rapid-response medical team within the National Disaster Medical System (NDMS). According to the Administration for Strategic Preparedness and Response (ASPR), DMATs provide medical care when public health and medical emergencies overwhelm state, local, tribal or territorial resources. A DMAT arrives with enough supplies and equipment to sustain itself for 72 hours, and it deploys only after a request routed through the state.
Definition and scope
ASPR states that NDMS is made up of four specialty team types: DMATs, Trauma and Critical Care Teams (TCCTs), Disaster Mortuary Operational Response Teams (DMORTs) and National Veterinary Response Teams (NVRTs). The DMAT is the team type built to deliver rapid-response medical care.
A DMAT combines clinical and non-clinical staff. ASPR lists physicians, medical officers and advanced clinicians on the clinical side, and command and control staff, safety specialists and logistical specialists on the non-clinical side. ASPR TRACIE describes DMATs as composed of professional and para-professional medical personnel, supported by pharmacists and by logistical and administrative staff, and available for disasters or special events.
How a DMAT is requested and deployed
NDMS is request-driven. ASPR’s “Calling on NDMS” guidance sets out the pathway:
- Local authorities make a request for NDMS assistance through the state.
- A state, tribal or territorial authority can have its request facilitated by an ASPR Regional Administrator or Regional Emergency Coordinator.
- Separately, federal agencies may request NDMS services in support of special activities and events, under memoranda of understanding.
Under Emergency Support Function 8 (ESF-8), ASPR describes NDMS as offering patient care, patient movement and definitive care, supplementing health and medical systems and response capabilities. Team members are federal intermittent employees: not full-time or part-time federal staff, and not volunteers. ASPR says they work frequently in austere conditions.
NDMS teams compared: what ASPR says each brings
The table covers only the supply statements that ASPR makes on its “Calling on NDMS” page.
| Team type | Primary role (ASPR) | Supply statement (ASPR) |
|---|---|---|
| DMAT | Rapid-response medical care when local capacity is overwhelmed | Sufficient supplies and equipment to sustain themselves for 72 hours |
| NVRT | Veterinary response | Backed by a cache of equipment, supplies and pharmaceuticals |
| DMORT | Mortuary response, including Disaster Portable Morgue Units | May deploy with a Disaster Portable Morgue Unit (DPMU) |
The contrast is the useful part. A DMAT’s stated supply concept is a self-sustainment window of 72 hours. ASPR does not describe a DMAT as a standing stockroom for the host facility.
Where it matters for labs, clinics and supply decisions
ASPR’s 72-hour figure describes how long the team can sustain itself. It is a statement about the team’s own needs, so a DMAT’s arrival should not be read as a replacement for local stock. For planners at hospitals, clinics and healthcare coalitions, the figure is a reminder that resupply and logistics for any longer deployment must be arranged by someone. DMATs include logistical specialists for this reason, according to ASPR.
For the local side of that planning, see disaster relief medical supply cache planning and medical supply logistics. For the command structure a hospital uses during an incident, see hospital incident command system. Related federal frameworks are covered in the Hospital Preparedness Program and Section 1135 waivers in a declared emergency.
Common misunderstandings
“DMATs are volunteers.”
ASPR states that each team member is a federal intermittent employee.
“A DMAT can deploy on its own.”
Per ASPR, local authorities request NDMS assistance through the state. Federal agencies can request services for special events through MOUs.
“DMAT is the whole of NDMS.”
NDMS has four specialty team types. The DMAT is one of them.
“72 hours means the host is covered for 72 hours.”
The ASPR statement is about the team sustaining itself, not about supplying the host facility.
FAQ
What is a DMAT?
A DMAT is a Disaster Medical Assistance Team: a federal rapid-response medical team under NDMS that provides care when public health and medical emergencies overwhelm state, local, tribal or territorial resources (ASPR).
Who can request a DMAT?
Local authorities request NDMS assistance through the state. ASPR Regional Administrators or Regional Emergency Coordinators can facilitate a request from a state, tribal or territorial authority. Federal agencies may request NDMS services for special activities and events.
How long can a DMAT sustain itself?
ASPR states that DMATs carry sufficient supplies and equipment to sustain themselves for a period of 72 hours.
Sources
- ASPR, “DMAT: Disaster Medical Assistance Teams” (NDMS teams), aspr.gov, checked 2026-10-30.
- ASPR, “Calling on NDMS”, aspr.gov, checked 2026-10-30.
- ASPR TRACIE, “Disaster Medical Assistance Teams (DMAT)”, asprtracie.hhs.gov, checked 2026-10-30.
