Jockey Quayde Krogh was dislodged when his mount Dubai Jorge charged in the enclosure prior to the start of Race 3 at Nowra on Sunday.
Quayde is conscious but is experiencing pain to his ribs and is undergoing medical assessment.
[Update at 3:45pm Sunday]: Quayde will be transported to hospital for further assessment with the race club awaiting arrival of a second ambulance on course.