Robert Altman, the caustic and irreverent satirist behind ``M-A-S-H,'' ``Nashville'' and ``The Player'' who made a career out of bucking Hollywood management and story conventions, died at a Los Angeles Hospital, his Sandcastle 5 Productions Company said Tuesday. He was 81.

The director died Monday night, Joshua Astrachan, a producer at Altman's Sandcastle 5 Productions in New York City, told The Associated Press.

The cause of death wasn't disclosed.