Dr. Dennis O'Brien MD

Primary Location for Dr. O'Brien

Board Certification, Specialty and Expertise

Dr. Dennis O'Brien identified specializing in Internal MedicineInternal Medicine
A personal physician who provides long term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults, and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections, and diseases affecting the heart, blood, kidneys, joints, and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine which incorporates an understanding of disease prevention, wellness, substance abuse, mental health, and effective treatment of common problems of the eyes, ear, skin, nervous system, and reproductive organs.. He obtained board certification from The American Board of Internal Medicine for Internal Medicine.

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Hospital Affiliations

A hospital affiliation covers any doctor who has an affiliation, association or admitting privilege with a hospital. A doctor's particular affiliation to a specific hospital can translate to the overall quality of that provider.

Dr. O'Brien is affiliated with 1 hospital:

St. Catherine of Siena Medical Center
50 Route 25A
Smithtown, NY

License

Dr. Dennis O'Brien has been confirmed to have a license in New York

Aliases

Patients may also know Dr. Dennis O'Brien MD as:

• Dennis S O'Brien
• D O'Brien

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