First and foremost, determine if the doctor (specialist) is in network with your provider (PCP) that you choose. Also make sure they accept the insurance plan you have chosen. Then consider how close the doctor’s office is to your home or workplace. Make sure you visit the office and talk to the staff to determine your compatibility and your comfort with the office dynamic. You can also research physician’s credentials on many websites.
It is up to you to do research and to see if this is what you want.