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

Chettinad Academy of Research and Education

Aarupadai Veedu Medical College and Hospital

Vinayaka Missions Medical College

Sri Lakshmi Narayana Institute of Medical Science

Sree Balaji Medical College

Paediatrics:

BLDE University

Dr.D.Y.Patil Medical College

VMKV Medical College

Meenakshi Medical College

Now 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