About
Dr. John P. O'Connor is a board-licensed internal medicine physician who has practiced on the east end of Suffolk County, Long Island, for more than 15 years. He earned his Bachelor of Science in Biology from the State University of New York at Binghamton in 1992. He then completed his Doctorate of Medicine at Ross University School of Medicine in Dominica, West Indies, in 1997. His internship and internal medicine residency both took place at Saint Agnes Healthcare in Baltimore, MD, finishing in 2000.
Dr. O'Connor holds hospital affiliation with Peconic Bay Medical Center, where he served as Vice Chief of Medicine from 2007 to 2011. He has served as Medical Director at Acadia Center for Nursing and Rehabilitation since 2009. He belongs to the American College of Physicians and the American Medical Association. His clinical focus spans diabetes, hypertension, elevated cholesterol, cardiovascular disease, and vascular disease. He brings a warm, individualized approach to every visit, including a touch of humor and even background music in his office.
Education & Training
Undergraduate
State University of New York at Binghamton, Bachelor of Science, Biology 1992
Medical School
Ross University School of Medicine, Dominica, West Indies, Doctorate of Medicine 1997
Residency
Internal Medicine, Saint Agnes Healthcare, Baltimore, MD 1998-2000
Additional Training
Internship: Saint Agnes Healthcare, Baltimore, MD 1997-1998
Conditions Treated
Who is Dr. O'Connor right for?
Dr. O'Connor is a strong fit for adults managing chronic conditions such as diabetes, hypertension, high cholesterol, or cardiovascular and vascular disease. Patients who want a physician focused on prevention and long-term health will find his emphasis on "health span" particularly valuable. He also serves members' dependents ages 18 to 26, making him a good choice for families. Patients who appreciate a warm, communicative doctor with a personalized approach will feel at home in his practice.
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Frequently Asked Questions
Dr. O'Connor focuses on diabetes, hypertension, elevated cholesterol, cardiovascular disease, and vascular disease. He also provides comprehensive preventive care and manages a wide range of primary care concerns. His goal is to help patients add more healthy, disease-free years to their lives.
Dr. O'Connor grounds his practice in empathy, compassion, and open communication. He takes a highly individualized approach, spending meaningful time with each patient to address both acute and chronic concerns. His office has a distinctly welcoming atmosphere, with friendly staff, a touch of humor, and even background music.
Dr. O'Connor earned his medical degree from Ross University School of Medicine in Dominica, West Indies, in 1997. He completed both his internship and his internal medicine residency at Saint Agnes Healthcare in Baltimore, MD, finishing his residency in 2000.
Dr. O'Connor holds affiliation with Peconic Bay Medical Center in Long Island. He served as Vice Chief of Medicine there from 2007 to 2011. He also serves as Medical Director at Acadia Center for Nursing and Rehabilitation, a role he has held since 2009.
Dr. O'Connor has practiced internal medicine on the east end of Suffolk County, Long Island, for more than 15 years. He serves patients from Calverton, Riverhead, Miller Place, Rocky Point, Sound Beach, and surrounding communities.
Dr. O'Connor is a member of the American College of Physicians and the American Medical Association. These memberships reflect his commitment to staying current with advances in internal medicine and primary care.
Yes, prevention is a central part of Dr. O'Connor's practice. He emphasizes the concept of health span — helping patients increase the number of healthier, disease-free years in their lives. His MDVIP membership includes comprehensive advanced health screenings and diagnostic tests designed to catch problems early.
Yes. Dr. O'Connor extends care to members' dependents ages 18 to 26. This benefit does not include the annual MDVIP Wellness Program, but it does allow young adults in a member's household to see Dr. O'Connor for primary care needs.
Doctor profile last updated June 8, 2026