How can you have the right to force someone to work for you? What would you do if someone came to you and said you had to work for them, no matter what? Maybe, as the AVVO category you selected might indicate, you were doctor shopping. Maybe you are on a list of drug-seeking patients? Maybe you are on medicaid? Many doctors do not accept medicaid or other forms of ObamaCare. Maybe they ran your credit rating and did not like it. You say, "no legitimate reason," but you do not know that and, as far as I can see, they do not have to disclose.
We do not have a client/attorney relationship until you make an appointment, we discuss your case face to face, I accept a retainer, and we explictly agree to enter into representation.