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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- Currently 1 of 4 stars
The overall average patient rating of Dr. Dennis O'Brien is Poor.
Specialties & Research
Dr. Dennis O'Brien, MD is board certified in Neurology.
- He has special expertise in 5 areas:
- Blood Disorders
- Electromyography (EMG)
- Gastrointestinal Cancer
- Lung Cancer
- Movement Disorders
Education & Awards
Dr. O'Brien graduated from University of Arizona, Tucson.
Dr. O'Brien has 3 hospital affiliations:
- Northwestern Lake Forest Hospital
- Deaconess Billings Clinic
- Stillwater Community Hospital
Accepted Insurance Plans
Dr. O'Brien accepts these health insurances in at least one office:
- Great-West Healthcare - 3 plans
- Cigna - 2 plans
- Aetna - 1 plan
- Humana - 3 plans
- Blue Cross Blue Shield of Montana - 10 plans
Similar doctors nearby
- Additional Information
- Where does Dr. Dennis K. O'Brien practice?
Dr. Dennis O'Brien practices Neurology near Billings, MT.
Additional practice locations include: Wilmette, IL and Evanston, IL.
See Billings Neurologists.