This publication establishes doctrinal multiservice tactics, techniques, and procedures (MTTPs) for health service support (HSS) units operating in a chemical, biological, radiological, and nuclear (CBRN) and toxic industrial material (TIM) environment. It is the intent of this document to inform the combatant commanders (CCDRs), joint force commanders (JFCs), joint force medical commanders and medical planners, and component commanders and their staffs on the tools available to provide the best quality of force health protection (FHP) and HSS in a CBRN environment to enhance mission success. This publication bridges the gaps between Service and joint HSS publications.