You haven't mentioned your Category. Neverthless, in 2018 under State Quota the cut offs for various Categories for Madras Medical College have been as follows:

General Category: 548

OBC: 499

SC: 380

ST: 308

Now this is 2018 data. Cut offs change every year and are dependant on various factors such as no.of candidates appearing for the exam, no,of candidates qualified, top NEET score and difficulty of the exam. Since 2018, 2019 cut offs increased by 15 marks. And Tamilnadu cut offs increased by 70-100 marks.

Dear aspirant, as you have not mentioned your category here so the cutoff rank for NEET in 2019 UR category was 1586 for madras medical college. For the cut off for other categories as well you may refer to the link below:

https://medicine.careers360.com/articles/neet-cutoff-tamil-nadu

Hope it helps.

All the best:)