Dr. Louis Avvento
750 Old Country Road, Riverhead, NY 11901
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About the Business

Welcome to Dr. Louis Avvento's Practice
Located at 750 Old Country Road in Riverhead, New York, Dr. Louis Avvento's practice is dedicated to providing exceptional medical care with a focus on oncology, hematology, and palliative care. Dr. Avvento, a highly respected and board-certified physician in Internal Medicine, Hematology, Medical Oncology, and Palliative Care, brings decades of experience and compassion to his patients.
Dr. Avvento's journey in medicine began with a degree from the University of Rome in 1981. He completed his residency at Jamaica Hospital in Queens, where he developed a profound interest in oncology, inspired by the challenges and opportunities to innovate in patient care. His commitment to revolutionizing cancer treatment led him to further specialize through a fellowship in Hematology and Oncology at Stony Brook University.
Since founding his private practice in Riverhead, Dr. Avvento has grown his team from a small staff of three to a dedicated group of forty-five oncology professionals, all committed to providing convenient and comfortable care for patients on the East End of Long Island. His pioneering efforts in the region have set new standards for patient care.
In addition to his practice, Dr. Avvento has served as the Medical Director of East End Hospice in Westhampton, NY since 1990 and has held key positions at Peconic Bay Medical Center and Southampton Hospital. He played a pivotal role in establishing the Palliative Care Fellowship at Southampton Hospital and has contributed to the certification of numerous healthcare professionals in palliative care.
Dr. Avvento's excellence has been recognized with numerous accolades, including being named among the “Best Doctors on Long Island” by Newsday and “Best Doctors” by New York Magazine. His dedication to patient-centered care has earned him the Patients' Choice Award and Compassionate Doctor Recognition multiple times.
With a commitment to both innovation and compassionate care, Dr. Louis Avvento continues to make a significant impact on the lives of his patients and the broader medical community. For more information or to schedule an appointment, please contact our office. We look forward to serving you with the highest level of medical expertise and compassion.
Reviews
"Dr Avvento has been my doctor since 1998. He is a very kind , caring and very knowledgable doctor. He and his staff do not rush you when you are seeing them. You may ask whatever questions you would like. The group that does the bloodwork is also very gentle with you. The practice overall is ver friendly and there to help."
"Literally impossible for me to express with words what Dr. Avvento has done for me when I was first diagnosed with stage IV Non- Hodgkin's lymphoma in September 1999 when he was in Southampton, East End Hematology & Oncology. After being in remission for a quarter of a century I was blessed once again to be cured by Dr. Avvento. I was so very impressed with everyone, Drs, nurses, receptionists and any clinic that I was sent to on Long Island that is affiliated with New York Cancer & Blood. Not only because of how they treated me..... but the healing affect it had on my soul to see the interaction and kindness towards each other. My thoughts are that love and healing go hand in hand and that it's contagious! God bless you all! Frank Smith....9/30/54 (Lol.... Last name & DOB)"
"The Riverhead facility is so professional and welcoming as well. , I have had many phlebotomies since I was diagnosed years ago and nothing compares to the care and impeccable treatment I have received here. The place is luminous and immaculate.The nurses are skilled and friendly, there is absolutely no discomfort during the treatment and the environment generates relaxation and well being .Also Dr Avvento’s P.A has always been present, attentive, very clear in her explanations and a keen listener. I really feel I am in the best of hands every time I enter this facility, Many thanks."
"As a 5 year cancer survivor, I am fully confident in Dr. Avvento. He really cares about his patients and is experienced, knowledgeable, thorough, and altogether professional. I traveled from FL specifically to have an appointment with him. He is truly a fine doctor and a credit to the profession."
"Dr. Avvento and his staff are Great!!!! I have never had an appointment where he wasn't prepared with all tests and info since the previous appointment. He explains everything so you can understand it and he answers all questions so you fully understand what is going on. His staff is friendly and pleasant, they make you feel comfortable and at ease. I am extremely happy that my Surgeon recommended Dr Avvento"
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