Meet Our Team

Boris Ratiner,
Boris Ratiner, MD Founder & Director
Dr. Ratiner finished Louisiana State University (LSU) School of Medicine in New Orleans, where he grew up. He then moved to San Francisco, where he finished Internal Medicine Residency

Dr. Ratiner finished Louisiana State University (LSU) School of Medicine in New Orleans, where he grew up. He then moved to San Francisco, where he finished Internal Medicine Residency followed by a Rheumatology Fellowship at University of California San Francisco (UCSF). In August of 1999, Dr. Ratiner took over a highly respected Rheumatology practice in the San Fernando Valley of Los Angeles. Dr. Ratiner is currently a Clinical Instructor of Rheumatology at UCLA and holds a teaching position at the Northridge Hospital Family Practice Residency Program and Cedars Sinai Medical Center. In addition, he is on the board and planning committee of the Arthritis Foundation.

Dr. Ratiner is also a frequent speaker at local hospitals to physicians and at community centers to patients on topics such as osteoarthritis, rheumatoid arthritis, gout, osteoporosis, lupus, and fibromyalgia. Dr. Ratiner has recently authored several book chapters on osteoarthritis and research papers on Hepatitis C arthritis. Dr. Ratiner is also fluent in Russian.

University of California San Francisco (UCSF)

Rheumatology Fellowship 1999, UCSF (Recertified in Rheumatology 2010)

Regular CME attendance, Clinical Instructor of Rheum Cedars/UCLA,MS Ultrasound Course,So Cal Rheum Society lectures,Tarzana Hospital Noon Conferences,Monthly Journal Club Cedars/UCLA,Weekly Journal Updates Review,Yearly Lupus Review Course at ACR,Yearly Rheumatoid Arthritis Therapy Update at ACR,Yearly attendance at American College of Rheum meetings

Clinical Instructor, UCLA Staff Physician at Northridge Family Practice Residency Staff Physician at West Hills Medical Center Staff Physician at Cedar-Sinai Providence Tarzana

Jenny S. Oh,
Jenny S. Oh, MD Staff Physician
Dr. Oh grew up on the East coast. She received her Bachelor’s degree from Tufts University and earned her medical degree from State University of New York at Buffalo.

Dr. Ratiner finished Louisiana State University (LSU) School of Medicine in New Orleans, where he grew up. He then moved to San Francisco, where he finished Internal Medicine Residency followed by a Rheumatology Fellowship at University of California San Francisco (UCSF). In August of 1999, Dr. Ratiner took over a highly respected Rheumatology practice in the San Fernando Valley of Los Angeles. Dr. Ratiner is currently a Clinical Instructor of Rheumatology at UCLA and holds a teaching position at the Northridge Hospital Family Practice Residency Program and Cedars Sinai Medical Center. In addition, he is on the board and planning committee of the Arthritis Foundation.

Dr. Ratiner is also a frequent speaker at local hospitals to physicians and at community centers to patients on topics such as osteoarthritis, rheumatoid arthritis, gout, osteoporosis, lupus, and fibromyalgia. Dr. Ratiner has recently authored several book chapters on osteoarthritis and research papers on Hepatitis C arthritis. Dr. Ratiner is also fluent in Russian.

University of California San Francisco (UCSF)

Rheumatology Fellowship 1999, UCSF (Recertified in Rheumatology 2010)

Regular CME attendance, Clinical Instructor of Rheum Cedars/UCLA,MS Ultrasound Course,So Cal Rheum Society lectures,Tarzana Hospital Noon Conferences,Monthly Journal Club Cedars/UCLA,Weekly Journal Updates Review,Yearly Lupus Review Course at ACR,Yearly Rheumatoid Arthritis Therapy Update at ACR,Yearly attendance at American College of Rheum meetings

Clinical Instructor, UCLA Staff Physician at Northridge Family Practice Residency Staff Physician at West Hills Medical Center Staff Physician at Cedar-Sinai Providence Tarzana

Adam Kreitenberg,
Adam Kreitenberg, MD Staff Physician
Born and raised in Southern California, Dr. Kreitenberg received his Bachelor of Science (B.S.) from the University of California, Los Angeles (UCLA) in the field of Physiological Sciences.

Dr. Ratiner finished Louisiana State University (LSU) School of Medicine in New Orleans, where he grew up. He then moved to San Francisco, where he finished Internal Medicine Residency followed by a Rheumatology Fellowship at University of California San Francisco (UCSF). In August of 1999, Dr. Ratiner took over a highly respected Rheumatology practice in the San Fernando Valley of Los Angeles. Dr. Ratiner is currently a Clinical Instructor of Rheumatology at UCLA and holds a teaching position at the Northridge Hospital Family Practice Residency Program and Cedars Sinai Medical Center. In addition, he is on the board and planning committee of the Arthritis Foundation.

Dr. Ratiner is also a frequent speaker at local hospitals to physicians and at community centers to patients on topics such as osteoarthritis, rheumatoid arthritis, gout, osteoporosis, lupus, and fibromyalgia. Dr. Ratiner has recently authored several book chapters on osteoarthritis and research papers on Hepatitis C arthritis. Dr. Ratiner is also fluent in Russian.

University of California San Francisco (UCSF)

Rheumatology Fellowship 1999, UCSF (Recertified in Rheumatology 2010)

Regular CME attendance, Clinical Instructor of Rheum Cedars/UCLA,MS Ultrasound Course,So Cal Rheum Society lectures,Tarzana Hospital Noon Conferences,Monthly Journal Club Cedars/UCLA,Weekly Journal Updates Review,Yearly Lupus Review Course at ACR,Yearly Rheumatoid Arthritis Therapy Update at ACR,Yearly attendance at American College of Rheum meetings

Clinical Instructor, UCLA Staff Physician at Northridge Family Practice Residency Staff Physician at West Hills Medical Center Staff Physician at Cedar-Sinai Providence Tarzana

Larisa Magid
Larisa Magid Physician Assistant
Larisa Magid received her degree in Microbiology from Odessa State University in Ukraine where she grew up.

Dr. Ratiner finished Louisiana State University (LSU) School of Medicine in New Orleans, where he grew up. He then moved to San Francisco, where he finished Internal Medicine Residency followed by a Rheumatology Fellowship at University of California San Francisco (UCSF). In August of 1999, Dr. Ratiner took over a highly respected Rheumatology practice in the San Fernando Valley of Los Angeles. Dr. Ratiner is currently a Clinical Instructor of Rheumatology at UCLA and holds a teaching position at the Northridge Hospital Family Practice Residency Program and Cedars Sinai Medical Center. In addition, he is on the board and planning committee of the Arthritis Foundation.

Dr. Ratiner is also a frequent speaker at local hospitals to physicians and at community centers to patients on topics such as osteoarthritis, rheumatoid arthritis, gout, osteoporosis, lupus, and fibromyalgia. Dr. Ratiner has recently authored several book chapters on osteoarthritis and research papers on Hepatitis C arthritis. Dr. Ratiner is also fluent in Russian.

University of California San Francisco (UCSF)

Rheumatology Fellowship 1999, UCSF (Recertified in Rheumatology 2010)

Regular CME attendance, Clinical Instructor of Rheum Cedars/UCLA,MS Ultrasound Course,So Cal Rheum Society lectures,Tarzana Hospital Noon Conferences,Monthly Journal Club Cedars/UCLA,Weekly Journal Updates Review,Yearly Lupus Review Course at ACR,Yearly Rheumatoid Arthritis Therapy Update at ACR,Yearly attendance at American College of Rheum meetings

Clinical Instructor, UCLA Staff Physician at Northridge Family Practice Residency Staff Physician at West Hills Medical Center Staff Physician at Cedar-Sinai Providence Tarzana

About Us

Rheumatology Therapeutics Medical Center is a comprehensive center, located in the Los Angeles area, that specializes in the treatment of diseases that affect joints, muscles, and bones. Many of these diseases also involve the immune system.

Our center is staffed by medical doctors board certified in Rheumatology and Internal Medicine and by allied health professionals that are experienced and caring. By offering on-site Rheumatology Consultative Services, X-ray, DEXA, MRI, Laboratory, Physical and Occupational Therapy, Clinical Trials, and Infusion Services we make your total care convenient for you.

RTMC is located in San Fernando Valley of Los Angeles. The center is only two blocks east of Reseda Blvd., on the corner of Ventura Blvd. and Avenida Hacienda, south side of Ventura Blvd. The center is also across the street from Providence Cedars-Sinai Tarzana Hospital, a leading hospitals in Los Angeles.