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
  • 382 Reviews
  • 994 Comments
  • 5
10/20/2026

Dr. Orrin Troum is my favorite doctor!

Providence Patient
  • 5
10/19/2026

Dr. Troum is knowledgeable, compassionate and takes a proactive approach to addressing and solving issues. He is a wonderful doctor and I am glad to have him on my healthcare team.

Providence Patient
  • 5
10/13/2026

Very good listening and diligent in finding results

Providence Patient
  • 5
10/13/2026

Ive been seeing dr troum for 30 years, he's a wonderful caring thought full doctor. I wish I could say this about all my doctors.

Providence Patient
  • 5
10/09/2026

This provider goes above and beyond to give the best care and listen to the patient

Providence Patient
  • 5
10/09/2026

Everything was fantastic. Dr Troum and his team are wonderful.

Providence Patient
  • 5
10/08/2026

Dr. Has always been the most supportive Doctor I have ever worked with. I have recommended him in the past and I will continue to recommend him to anyone who I feel could benefit from him. I do not mind driving two hours to my appointments to see him, my health is very important to him and I appreciate that. I believe he is probably the best in the business!!!

Providence Patient
  • 5
10/08/2026

Thank you Dr. Troum.

Providence Patient
  • 5
10/05/2026

Dr Troum provides the absolute best healthcare. He's extremely professional, very thorough & a thought leader in rheumatology.

Providence Patient
  • 4.94
10/04/2026

Dr Trump is very good as a Dr and knows how to make the patient feel better

Providence Patient