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

Jawaharlal Nehru Medical College

Amrita Institute of Medical Sciences

KIMS, Telangana

K.S. Hegde Medical Academy

MGM 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