It's a great score. First of all congratulations for your efforts and results.

Stanley medical college had cutoff 576 marks last year for 15% AIQ quota equivalent to AIQ rank of 3520. And Kilpauk GMC had cutoff 565 marks equivalent to AIQ rank of 4909. Don't compare with the marks as the cutoffs have increased way higher this year. But you stand a fair chance in these colleges I guess. 

For further detailed information refer to our site... 

https://medicine.careers360.com/articles/neet-cutoff-tamil-nadu/amp#referrer=https://www.google.com

Best wishes. 

Thank you.