The 23-year-old singer, who made it to the final 12 contestants in the 2008 season of the reality television show when David Cook eventually won, has been hospitalised in Los Angeles ever since the incident on Wednesday.
According to TMZ, Epperson broke her jaw, pelvis, nine ribs and multiple vertebrae in the crash. She has also suffered injuries to her lung, spleen and kidney.
A spokesperson for Epperson said that she is surrounded by her family and that doctors say she will make a full recovery.
Two days before Epperson first auditioned for American Idol, her father was killed in a car accident.
After taking part in the competition, Epperson moved to Atlanta and landed a role in the musical Hair Show alongside Chaka Khan. She is now believed to be working on a new album and has become the protégé of Kenneth "Babyface" Edmonds.
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Watch Asia'h Epperson's first American Idol audition below: