Dr. David Rivadeneira, MD

In the past months the pain became unbearable to the point I didn't want to eat to avoid additional pain. My PCP recommended me to your office. Your review and explanation of my conditions was detailed and explained in a way I could understand and relate to. You explained what I surgical procedure I would require and that I would not require a bag. I am now 2months later with no eating restrictions, no bag , I go to the bathroom without pain or pressure. and most of all able to eat and Thxs

I first met Dr. Rivadeneira when I was diagnosed with colorectal cancer. It was a very frightening time for me. But, from our first meeting he calmed my fears with his kind and understanding manner. He listened and answered all my questions. I was not his patient. I was his family. He is a learned doctor/surgeon. His impressive C.V. is an understatement. I believe Dr. Rivadeneira's mission is saving lives. He saved both my life and my quality of life.

My experience with Doctor Rivadeneira and his medical staff was exceptional I went to him about a blockage in my colon after completing two colonoscopy’s . He spent the time explaining to me my condition. He even provided me with a drawing showing exactly what his proposal was to correct my situation. His ability to explain and lead in layman’s terms was outstanding. He has a great bedside manner. The doctor and his staff supported me throughout my surgeries. Thank you Dr Rivadeneira

Dr. R walked me through the worst medical experience of my life. He was kind, caring and listened to my concerns. I called him a few times with emergency situation and was called back within minutes.

I can't say enough about my positive experience with Dr. R, the Northwell Health Network and my surgeries and stay at Huntington Hospital. I mysteriously (I didn't rip during child birth, do not have gastric disease such as Crohn's) developed a rectovaginal fistula at the rarest possible spot at sphincter muscle. Doctor's near me, upstate NY, wouldn't even touch me. Dr. R first inserted seton drain to strengthen tissue and then performed fix months later. I am success story. I got my life back!

After a frightening diagnosis of Colon Cancer, I was blessed by being referred to Dr. David Rivadeneira and his awesome team. What can I say? I am a 79 year old woman, not knowing what to expect, and the minute I met Dr. D, I knew all would be well. Everything was explained in detail, and a doctor who was patient and kind, as were all his wonderful team and front office staff. From my family and I, I thank you from the bottom of my heart.

I was taken care of in Dr. Rivadeneira's office in Smithtown. My PCP recommended me Dr. Rivadeneira, and I was very glad that I decided to visit his office. Dr. Rivadeneira is extremely professional, clear with his words and decisions, kind and courteous. I would recommend anyone who needs this type of medical help, to come to Dr. Rivadeneira for a consultation or treatment.