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Surgical Specialist, Orthopaedic Surgeon
31 years of experience
Accepting new patients
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

Patient comments (9)

The overall average patient rating of Dr. Walter O'Brien is Good. Dr. O'Brien has been reviewed by 31 patients who have provided 9 comments. The rating is 3.5 out of 5 stars.

Patient Ratings
Ease of Appointment 3.7
Promptness 3.2
Courteous Staff 3.3
Accurate Diagnosis 3.3
Bedside Manner 2.9
Spends Time with Me 3.0
Follows Up After Visit 2.7

Specialties & Research

  • He has special expertise in 3 areas:
  • Hip Osteoarthritis
  • Knee Osteoarthritis
  • Osteoarthritis (Hand and Wrist)

Education & Awards

Dr. O'Brien graduated from University of Kansas , Kansas City.


Dr. O'Brien has 7 hospital affiliations:

  • St. John's Hospital & Health Center 
  • Centinela Freeman Regional Medical Center-Marina Campus 


  • Spanish

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Additional Information
Dr. Walter Ray O'Brien MD is a male Orthopaedic Surgeon, has 31 years of experience and practices in Orthopaedic Surgery.
Where does Dr. Walter R. O'Brien practice?
Dr. Walter O'Brien has 3 office locations.
Dr. Walter O'Brien practices Orthopaedic Surgery near Los Angeles, CA.
Additional practice locations include: Malibu, CA and Hawthorne, CA.
See Los Angeles Surgeons.