Hello, 

The NEET requires a minimum percentile score i.e. a qualifying score for  the admission process. The minimum percentile score of General/ Open Category is 50th Percentile score for the admission process. A percentile score is calculated on the basis of your performance with respect to the performance of the other candidates who have appeared for the exam. 

If we talk about minimum marks required in NEET, then a score of 550 and above will have a higher chance of admission in MBBS through the All India Quota as well as State Quota. 

Good Luck.