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
  • 423 Reviews
  • 702 Comments
  • 5
05/27/2025

Very caring clinician

Providence Patient
  • 5
05/26/2025

Very thorough questioning on symptoms and concerns

Providence Patient
  • 5
05/19/2025

Dr Troum is very kind very informative and caring doctor. Hi assistant Jose is also very professional and very kind

Providence Patient
  • 5
05/19/2025

Dr. Troum is an excellent physician. He is knowledgeable, patient, thorough and kind. Thank you!

Providence Patient
  • 5
05/19/2025

Excellent communication with patients and spends needed time to explain issues. Will go beyond one area of immediate problem.

Providence Patient
  • 5
05/19/2025

Dr. Troum is an excellent physician. I really appreciated his thoroughness in dealing with my bone density issues. He is thorough and pro-active on my behalf as his patient.

Providence Patient
  • 5
05/18/2025

Very attentive team.Thank you

Providence Patient
  • 5
05/14/2025

My experience with Dr. Orrin Troum is always excellent in every way.

Providence Patient
  • 5
05/11/2025

Great doctor and visit but Dr was an hour late.

Providence Patient
  • 5
05/11/2025

Dr. Troum is a superlative person and physician. He has an excellent mode of interacting with patients and I consistently leave my appointment with greater knowledge of my conditions and a sense of surety that I am receiving top of the line diagnostic and clinical care. I am most fortunate to have Dr. Troum supporting my health.

Providence Patient