Hello dear student, 
I would like to tell you that the cutoff varies every year. It depends on lots of factors like difficulty level of paper and number of students. It will be different for Government, Private and Deemed medical colleges. Also, it will differ you applying from All India quota 15% or State quota 85%. Cut off of state quota is usually lower than all India quota. Now in each of this quote, it's further divided into categories like OPEN/SC/ST/OBC
SRM is a  private medical college. To get admission in this colleges you need to score 550+ in NEET.

I hope this was helpful

Best wishes