Orrin Troum MD

Orrin Troum, MD

Rheumatology

Accepting New Patients

About Orrin Troum, MD  

Double certified by the American Board of Internal Medicine in Rheumatology and Internal Medicine, Orrin M. Troum, MD, is a Clinical Professor of Medicine and Voluntary Faculty Member of the Division of Rheumatology at the Keck School of Medicine-University of Southern California.   

Dr. Troum completed his medical training at the Universidad Autonoma de Guadalajara in Mexico. He completed his internship and residency at the LAC & USC Medical Center in Los Angeles, California, and is a Fellow Master American College of Rheumatologh.

Dr. Troum pioneered the Extremity MRI in the United States for evaluation, clinical decision process, and outcome for inflammatory arthritis patients. Also, he is a recent Past President of The International Society for Musculoskeletal Imaging in Rheumatology (ISEMIR).   

Dr. Troum has served on the Arthritis Foundation by being a member of their Board of Directors, Medical & Scientific Committee, and most recently the Advocacy and Public Policy Committee. He joined The Doctors of St. John’s Medical Group in 2014 and is a member of their Board of Directors.  

Dr. Troum has published several articles, including one on the short-term changes on MRI predicting long-term changes on radiography in rheumatoid arthritis, which is an analysis by an OMERACT Task Force of pooled data from four randomized controlled trials. Another article examines the validity of the rheumatoid arthritis magnetic resonance imaging score according to the OMERACT filter-a systematic literature review.  

Dr. Troum enjoys working with his patients. That may be why they say he is knowledgeable, pleasant, respectful, and extremely thorough.  

Dr Troum is a knowledgeable and empathic doctor. He is very conscientious. I have always had superior experiences with him as my doctor.

Real Patient
Orrin Troum

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Orrin M. Troum, MD
Rheumatology

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Rheumatology
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Medical Service

Rheumatology

Locations

2336 Santa Monica Blvd., Suite 207,
Santa Monica, CA 90404

Education

Medical School
Universidad Autonoma de Guadalajara, Mexico
1979

Internship
LAC – USC Medical Center, Los Angeles, CA
1981

Residency
LAC – USC Medical Center, Los Angeles, CA
1983

Fellowship
LAC – USC Medical Center, Los Angeles, CA
1985

Languages

Spanish

child checkup

Reviews

At Providence, we’re dedicated to providing you quality, personalized health care. We are constantly striving to optimize your experience.

As part of ensuring you have a positive experience with Providence, our online provider directory includes ratings and patient comments for select providers. More about our survey.

  • 5
  • 392 Reviews
  • 741 Comments
  • 5
08/10/2025

Dr Troum is the best he takes time and listens to what you have to say Then he speaks to you explains what you asked or clarify what needs to be addressed If every doctor was like Dr Troum it would be a better world He cares gif his patients

Providence Patient
  • 5
08/09/2025

Provider has a specialty and my good memory of past visit brought me again to see him, and he was excellent in communication broadly and per my specific issues.

Providence Patient
  • 5
08/01/2025

The best arthritis md and staff ever, the overall staff is outstanding. Very knowledgeable, understanding and friendly provider.

Providence Patient
  • 4.94
08/01/2025

Thoughtful, kind, problem-solver

Providence Patient
  • 5
08/01/2025

Dr Troum is very kind and very helpful.

Providence Patient
  • 5
07/31/2025

Great provider. I trust Dr Troum more than any other provider I have worked with.

Providence Patient
  • 5
07/31/2025

Dr. Troum is a very special mans so kind, sweet, understanding,,explains everything and is so easy to talk to. So lucky he is my doctor.

Providence Patient
  • 5
07/30/2025

Excellent doctor and staff

Providence Patient
  • 5
07/24/2025

Extremely generous with his time and depth of knowledge.

Providence Patient
  • 4.94
07/21/2025

Dr. Troum is very thorough, listens carefully to your answers, fully addresses concerns and questions, and makes sure that you are following through with medical treatments.

Providence Patient