Hello Aspirant,
See this is the first time when AIIMS is going to conduct its admission through NEET score so it is quite difficult to predict an exact cut-off marks or rank for it. However it is one of top most known GMC of India therefore cut-off will also go quite higher, so with General category if you are scoring 650 marks or more then you might be in the safer side to get seat in AIIMS. Also in all AIIMS seats are filled only through All India Quota conducted by DGHS on the behalf of MCC. AIIMS do not take part in state counselling so they have no state quota.
If you want to take admission in AIIMS Nagpur then you have to take it through All India Counselling either you belongs to Maharashtra or any other state.
To have a list of all those colleges which you can get based upon your marks, category, and state you can use NEET College Predictor:-
https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer
I hope this information helps you.
Good Luck!!
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