Hello

Cutoff varies from year to year depending on various factors such as the difficulty level of the exam, the number of candidates appearing in the exam, etc. 

Last year NEET cut off marks required for admission to Madras Medical College for the open category was 548.

Also, you can use the NEET College Predictor Tool to check your chances of admission in colleges based on your score

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https://medicine.careers360.com/neet-college-predictor