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

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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
  • 385 Reviews
  • 904 Comments
  • 5
05/28/2026

Always professional friendly and caring

Providence Patient
  • 5
05/12/2026

Great job of tracking any problems.

Providence Patient
  • 5
05/11/2026

Dr Troum is highly regarded in the field of rheumatology, I did not expect to get in right away with him, but I was surprised and pleased by the immediate response by the receptionist and his staff! I had the most wonderful experience with Dr. Troum, he was thorough in his examination, professional, his demeanor and Holistic and his approach to treatment options for my diagnosis. His professional demeanor and attention to detail are extraordinary. He is the kind of doctor that every patient dreams of, and it should expect , he provides care at the highest quality of care possible.! It is common to see doctors are rushing between patient after patient however, my experience in my appointment was none other than the opposite. He created me with friendly open, strange good eye, contact, and thorough examination and treatment options. I am very glad that I saw Dr. Troum And will continue to call him my favorite doctor!

Providence Patient
  • 5
05/10/2026

I am continually amazed by and grateful for the superlative level of clinical care and caring manner exhibited by Dr. Orrin Troum. His manner is supportive, sincere, and always edifying regarding my conditions. He genuinely seeks information, listens intently, and provides practical guidance which supports my health. He is a remarkable physician.

Providence Patient
  • 5
05/10/2026

The best service

Providence Patient
  • 5
05/09/2026

Wonderful doctor.

Providence Patient
  • 5
05/09/2026

My routine follow-up visits with Dr Troum are always centered around how my Rheumatoid arthritis is affecting my daily routine, have there been any changes, confirming dose and frequency of my medications, review of current lab values and a physical exam. Since Dr Troum Is a team member of The Rheumatology Education Group and I am a retired pharmacist, Dr Troum always makes It a point to Inform me of new therapies and findings with respect to treatment of RA.

Providence Patient
  • 5
05/08/2026

Very good!

Providence Patient
  • 5
05/04/2026

Dr Troum is the Best!

Providence Patient
  • 5
05/02/2026

Doctor Troum is a great doctor.He is the most knowledgeable and caring doctor in my opinion.

Providence Patient