Dear Zoya, we do not have 2019 data yet. Neverthless, in 2018 under State Quota, 541 marks secured a seat in IGIMS. But in 2019 after Round 1, the cut off for OBC  was around 582. Having said that the cut offs change every year depending on various factors such as no.of Candidates appearing for the exam, no.of Candidates qualified, top NEET score and difficulty of the exam. So you should atleast aim for 625 and more to secure a seat in this college under OBC Category.