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

Selected: Up Next:

Orrin M. Troum, MD
Rheumatology

Selected: Up Next:

Rheumatology
01 / 02

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
  • 931 Comments
  • 5
07/13/2026

Dr. Troum is the best in his field.

Providence Patient
  • 5
07/13/2026

Since I started seeing Dr Troum, his advice, treatments and referrals have completely improved my health. I will forever be grateful that my knee surgeon referred me to him

Providence Patient
  • 5
07/11/2026

I've been Dr. Troum's patient for 20 plus years. Initially for rheumatoid arthritis and now for my prolia shots. He is absolutely the best. I've been in remission for the arthritis for about 15 years.

Providence Patient
  • 5
07/02/2026

He's one of the best doctors I've ever seen, which I believe says it all. I'm usually nervous before a doctor visit but not with Dr. Troum, even if he had to drain fluid from my knee (which I didn't need this visit.)

Providence Patient
  • 5
06/29/2026

Dr. Troum is a wonderful rheumatologist!

Providence Patient
  • 5
06/28/2026

Excellent

Providence Patient
  • 5
06/28/2026

I've been seeing Dr Troum for decades and the care I receive is exceptional. He remembers me, allocates the time required and is someone who cares about my well being. Terrific doctor.

Providence Patient
  • 5
06/26/2026

Dr Troum and his team and nurse are excellent !!!!!!!

Providence Patient
  • 5
06/26/2026

Always exemplary service!

Providence Patient
  • 5
06/23/2026

Dr Troum is a extremely caring individual who listens. His care keeps out of severe pain.

Providence Patient