The music director, 72, was hospitalised on Friday after he complained of breathlessness. Raja said Ilayaraja was undergoing normal tests at the hospital and it was nothing serious.
"He was suffering from breathlessness on Friday so we admitted him to the hospital. This morning he got discharged. He already left to compose for an untitled movie," Raja told PTI.
Earlier, Ilayaraja's nephew actor-director Venkat Prabhu assured fans that the music director was doing fine.
"For all isaignani fans and well wishers out there!! Raja pa is absolutely fine!! Just a general check up and few tests! He is back home today," Prabhu posted on twitter.
He is credited for integrating folk and international sensibilities in South Indian music.
He has won four National Film Awards; three for Best Music Direction and one for Best Background Score. In 2010, he was awarded with Padma Bhushan. He most recently composed music in Amitabh Bachchan starrer "Shamitabh".
