I have been a patient of Doctor Diamond for about nine years and consider him to be one of the most skilled dentist specializing in gum disease. Members of his staff are extremely courteous and professional, making sure the patient feels right at home during office visits. My appreciation of the doctor's skills and staff are not only limited to my words. While living and working abroad, I continued to travel to NYC to visit Doctor Diamond because his abilities and skills are simply that good. Finally and above all, Doctor Greg Diamond is a great guy!.