The required cutoff changes each year. In recent years, the required cutoff for general, OBC, SC category students were 647, 1516, and 8657.
If you really want to get selected at AIIMS Bhopal, attend all the counseling rounds. You can get admission with as much as 700 for UR, in the third round. Also, there is spot counseling. Ranks vary a lot in these. Even with a rank of 1500, you can get a UR seat.