To provide direct and general Health Service Support (HSS) to Marine Forces Reserve in order to sustain the combat effort.
Secondary mission is to provide security for the Shock Trauma Platoons (STP) and Forward Resuscitative Surgical Systems (FRSS).
In 2006 reservists from San Diego H&S Detachment mobilized for combat operations in the Anbar Province of Al Fallujah, Iraq with 1st Battalion-24th Marines, Weapons Company.
These members returned in late March and demobilized while more reservists from the battalion deployed to replace those stationed at TQ and Korean Village.
Regardless of rank and MOS, reservists at 4th medical Battalion continue to move forward and volunteer for deployment.