Going by previous All India cut offs and your rank you may have decent chances in Dermatology  in Medical Colleges like:

Chettinad Academy of Research and Education

Aarupadai Veedu Medical College

Vinayak Missions Medical College

Sri Lakshmi Narayana Institute of Medical Science

Sree Balaji Medical College and Hospital

Having said that, this is 2019 data and cut offs change every year depending on various factors such as no.of Candidates appearing for the exam, no.of Candidates qualified, difficulty of the exam, and no.of seats available for each specialisation. Please try our College predictor to check the possibility of other specialisations with you rank across India:  https://medicine.careers360.com/neet-pg-all-india-college-predictor