Naval Medical Center San Diego (NMCSD), also known as Bob Wilson Naval Hospital and informally referred to as "Balboa Hospital", or "The Pink Palace" (because the stucco of the first buildings that were constructed was pinkish in color), is a technologically advanced Navy medical treatment facility. Located within the grounds of Balboa Park in San Diego, the hospital has played a role in the history of San Diego for more than 100 years. The goal has remained constant, to provide the finest medical care in a family-centered care environment to operational forces, their families, and veterans. Organizationally, the hospital is first and foremost a military command.

USNS Mercy (T-AH-19) is the lead ship of her class of hospital ships in non-commissioned service with the United States Navy. Her sister ship is USNS Comfort (T-AH-20). She is the third US Navy ship to be named for the virtue mercy. In accordance with the Geneva Conventions, Mercy and her crew do not carry any offensive weapons, though defensive weapons are available.