> > > > Dr. Dennis O'Brien, MD
Dr. Dennis Sean O'Brien MD is a male General Practitioner, has 30 years of experience and practices in Internal Medicine and General Practice.
Dr. Dennis O'Brien has 2 office locations.
403 Lake Ave
Saint James, NY 11780

Phone Number
Locations and availability (2)
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).

Learn more about Dr. Dennis O'Brien:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

  • Currently 3.5 of 4 stars
Patient comments (3)

The overall average patient rating of Dr. Dennis O'Brien is Excellent. Dr. O'Brien has been reviewed by 7 patients who have provided 3 comments. The rating is 3.5 out of 4 stars.

Patient Ratings
Ease of Appointment 3.2
  • Currently 3.2 of 4 stars
Promptness 3.0
  • Currently 3 of 4 stars
Courteous Staff 2.6
  • Currently 2.6 of 4 stars
Accurate Diagnosis 3.0
  • Currently 3 of 4 stars
Bedside Manner 3.0
  • Currently 3 of 4 stars
Spends Time with Me 3.0
  • Currently 3 of 4 stars
Follows Up After Visit 3.0
  • Currently 3 of 4 stars

Specialties & Research

Dr. Dennis O'Brien, MD is board certified in Internal Medicine.

  • He has special expertise in 1 area:
  • Flu (Human Influenza)

Education & Awards

Dr. O'Brien graduated from Universite De Bordeaux Ii.


Dr. O'Brien has 1 hospital affiliations:

  • St Catherine Of Siena Medical Center 

Accepted Insurance Plans

Dr. O'Brien accepts these health insurances in at least one office:

  • United Healthcare - 16 plans
  • Great-West Healthcare - 2 plans
  • Empire Blue Cross Blue Shield - 15 plans
  • Unicare - 5 plans
  • Oxford Health Plans - 3 plans
  • Cigna - 12 plans
  • Capital District Physicians Health Plan - 7 plans
  • Aetna - 3 plans


  • French

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Additional Information
Where does Dr. Dennis S. O'Brien practice?
Dr. Dennis O'Brien practices Internal Medicine and General Practice near Saint James, NY.
See Saint James Internists and Saint James General Practitioners.