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Hematology Specialist, Oncology Specialist (cancer)
30 years of experience
Accepting new patients
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Patient Reviews

Patient comments (11)

The overall average patient rating of Dr. Louis Avvento is Excellent. Dr. Avvento has been reviewed by 23 patients who have provided 11 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.4
Promptness 4.3
Courteous Staff 4.5
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 4.7
Follows Up After Visit 4.6

Specialties & Research

Dr. Louis Avvento, MD is board certified in Hematology and Medical Oncology.

  • He has special expertise in 13 areas:
  • Acute Myeloid Leukemia
  • Adult T-Cell Leukemia-Lymphoma
  • Breast Cancer
  • Cancer
  • Chronic B-Cell Lymphocytic Leukemia
  • Chronic Myeloid Leukemia
  • Chronic Myelomonocytic Leukemia
  • Deep Vein Thrombosis
  • Hepatitis C
  • Leukemia
  • Lymphoma
  • Metastatic Breast Cancer
  • Palliative Care

Education & Awards

Dr. Avvento graduated from Universita Degli Studi Di Roma La Sapienza (Facolta I), Rome. He has 7 awards.

Newsday "Best Doctors on Long Island" 2008
Peconic Bay Medical Center, Riverhead, NY, "Physician of the Year 2005"
New York Magazine "Best Doctors" 2004/2008
Castle Connolly Top Doctors: New York Metro Area™ (2002 - 2008, 2010 - 2015)
Patients' Choice 5th Anniversary Award (2012)
Patients' Choice Award (2008 - 2012, 2014)
Compassionate Doctor Recognition (2010 - 2012, 2014)


Dr. Avvento has 9 hospital affiliations:

  • Eastern Long Island Hospital 
  • Southampton Hospital 


  • Spanish
  • Italian

> > > > Dr. Louis Avvento, MD

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Additional Information
Dr. Louis J Avvento MD is a male Hematologist, has 30 years of experience and practices in Medical Oncology and Hematology.
Where does Dr. Louis J. Avvento practice?
Dr. Louis Avvento has 2 office locations.
Dr. Louis Avvento practices Medical Oncology and Hematology near Riverhead, NY.
Additional practice locations include: Southampton, NY.
See Riverhead Oncologists and Riverhead Hematologists.