You haven't mentioned your Category. Nevetheless, in 2019, under All India Quota, the cut offs for Doon Medical College under various Categories have been as follows:

General Category: 599

SC:492

ST:470

So with a score of 587, for a seat in DMC if you belong to General Category is tad difficult. But if you belong to Reserved Categories, you do have decent chances. Having said that, this is based on 2019 data and cut offs change every year. Cut offs change every year depending on various factors such as no.of Candidates appearing for the exam, no.of Candidates qualified, top NEET score and difficulty of the exam. For a complete list of colleges that you may have a shot at, please use our College predictor: https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer