This is the biggest Starfleet Medical Ship the Mercy Class Crusier large enough to treat 150 crewmen and 200 wounded. Even the entire ships crew compliments is 1015 of the (original standard). This type of starship is armed with phasers and torpedoes also includes 5x shuttle bays for EVAC and emergency uses. It is really the Starfleet's biggest Hospital ship ever designed.
USS MERCY NCC-555792
MERCY CLASS CRUSIER