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
  • 429 Reviews
  • 715 Comments
  • 5
06/10/2025

I was very pleased with the attention to detail and concern for my well being

Providence Patient
  • 5
06/10/2025

Outstanding

Providence Patient
  • 5
06/08/2025

Best!!!

Providence Patient
  • 5
06/07/2025

Empathetic and knowledgeable.

Providence Patient
  • 5
06/06/2025

Always get the best care from this provider

Providence Patient
  • 5
06/02/2025

My experience with this care provider has been excellent every time. I feel very fortunate to have access to such exceptional health care especially as I age and require more medical expertise and services

Providence Patient
  • 5
06/02/2025

Always attentive and understanding Knows about my condition n answers all questions

Providence Patient
  • 4.94
06/02/2025

Excellent first visit. Impressed with the courtesy, professionalism and warm of the entire office but especially. Dr. Toum. He made me feel welcomed and respected. The staff is friendly and helpful. Not to mention his knowledge of rheumatology. Dr. Toum even decorates his office with weekly live flowers in every room!

Providence Patient
  • 5
06/01/2025

Very good service,polite.

Providence Patient
  • 5
06/01/2025

Dr Troum was one of the best Doctors I have ever seen. This was my first appt. And I am so happy to be under his care.

Providence Patient