Adiarte enjoyed a glittering career in musicals, including the film adaptations of the Rodgers and Hammerstein shows The King And I and Flower Drum Song.
The Philippines-born actor also appeared on classic television programs like Bonanza, The Brady Bunch and Hawaii Five-O and Kojak in the 1970s. During that decade, he landed his most enduringly popular role as the camp houseboy Ho-Jon on M*A*S*H, which he played from 1972 to 1973.