Frank seemed to have a bad day to write such a review for Dr. Rattan. I have been his patient for a long time and there have been no instances whatsoever of egregious behavior or misconduct. The experience has rather been quite the contrary. Dr Rattan has a very humble demeanor and he shows a sense of utmost respect and sincere concern for his patients. He is wise and has a tenacity for getting answers. His diagnosis have always been accurate and timely. He and his staff are extremely hard working and very helpful. I highly recommend greenbelt endoscopy center and of course Dr. Sushil Rattan!