> > > > Dr. Dennis O'Brien, MD
Dr. Dennis Kevin O'Brien MD is a male Neurologist, has 16 years of experience and practices in Neurology.
Dr. Dennis O'Brien has 5 office locations.
821 N 27th St
Billings, MT 59101

Phone Number
Locations and availability (5)
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

  • Currently 1 of 4 stars
Patient comments (0)

The overall average patient rating of Dr. Dennis O'Brien is Poor. Dr. O'Brien has been reviewed by 2 patients who have provided 0 comments. The rating is 1 out of 4 stars.

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


  • Spanish

Similar doctors nearby

Dr. Dale Peterson

43 years experience
Billings, MT

Dr. Steven Arbogast

6 years experience
Billings, MT

Dr. Thais Weibel

16 years experience
Billings, MT

Dr. Mary Gaddy

30 years experience
Billings, MT

Dr. Jeffrey Mosser

33 years experience
Billings, MT

Dr. Arturo Echeverri

Billings, MT
Search All Similar Doctors
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.