My father was an excellent doctor, so I have high standards for what I expect from a physician. Although I have been treated by some fine doctors, I would say that Dr. Singer is the best I have ever worked with, and I am a senior citizen with decades of experience with medical care professionals. The main reason is that Dr. Singer is what I consider to be a real scientist. He orders detailed tests, most of which none of my doctors have administered before. Not just made guesses based on likely percentages based on my age, medical history, and a few symptoms, which is what most docs have done. Second, he takes more time than any doctor I have ever worked with to listen and explain. He is patient and good-humored, tolerant of my foibles, and respectful. And he is willing to volunteer when he doesn't know something or when an issue is outside his training or abilities. I would give more stars if I could.