Dr Nader is the best doctor I have ever had in DC area. He is very sharp knowing what is wrong with me and give me the correct information. Last year I was suffering droziness and memory lost. I saw a few doctors in clinic that charge patients membership fee. They bounced me back and forth, treated me like I was having allergies. But end up my situation was getting worse. I gave up that fancy clinic and went back to Dr. Nader,he suggested that I have sleeping apnea. End up he is right. I was diagnosed with sleep apnea after went through a sleeping test. I am very greatful that he knows my issue and give me correct direction.Thank you. Dr. Nader.