You  haven't mentioned the Category your son belongs to. Nevertheless, with an All India Rank of 193905, he can get into Deemed Universities like:

Chettinad Academy of Research and Education

Sri Ram Chandra Institute of Higher Education

Sri Sathya Sai Medical College

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. The annual fees might be around 22,00,000Rs per annum including the miscellaneous charges. 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