Dr Andrey Popykin specializes in adult internal medicine and he spends time listening to you and discussing your situation with as much detail as you want. That is, in my opinion, an extremely important quality for a doctor. He has been my primary care physician for several years. Dr Popykin does not hesitate to refer you to the best specialists that he knows of. Those that I have been referred to are: Dr Mark Chastain, skin specialist; Dr Brion Lock, lung specialist; Dr Suku George, gastroenterology; Dr Howard Borger, ophthalmology; and Dr Robert Halpern, retinopathy. From my perspective as a professional biologist, my assessment of my treatments from Dr Popykin and all of these doctors is «two thumbs up.» All are excellent in my opinion.