Mobile Medical Unit 4-077 was a mobile hospital of the Corellian Defense Force.
In 1 ABY, the unit was stationed in the Corellian wilderness for a big training exercise. During this exercise, criminal lowlifes repeatedly tried to steal their medical supplies. When a crate of ion beamers was stolen by smugglers, the unit scraped money out of their orotay-filter replenishment fund and hired a group of spacers to find the smugglers, retrieve the crate and destroy their base.
The Mobile Medical Unit 4-077 was mentioned in the 2003 video game Star Wars Galaxies: An Empire Divided, a massively multiplayer online role-playing game developed by Sony Online Entertainment and published by LucasArts, prior to its closure on December 15, 2011. The Mobile Medical Unit 4-077 was mentioned in a mission called "Mobile Hospital Has Smuggler Problem" available on mission terminals on Corellia.
The Mobile Medical Unit 4-077 is has a parallel with the 4077th Mobile Army Surgical Hospital, the setting of the novel, movie, and television series M*A*S*H.