Meet The Team

Executive Management / Physician Leadership

Leadership can be hard to define and it means different things to different people. Our leaders set direction and help themselves and others to do the right thing to move forward. To do this they create an inspiring vision, and then motivate and inspire others to reach that vision.

Mark R. Bell, M.D., FACEP

President
Mark R. Bell, M.D., F.A.C.E.P. is a graduate from the Chicago Medical School. His undergraduate training was at Westmont College, in Santa Barbara, California. Mark completed residency in Emergency Medicine at University California at Irvine in 1996 and is a fellow of the American College of Emergency Physicians. Following residency, Dr. Bell went into private practice in the South Bay of Los Angeles and soon partnered with Dr. Irv Edwards at Emergent Medical Associates. Through a dedication to quality, service, and efficient patient care, their emergency department management company grew from 5,000 patient visits per year, to more than 700,000 over the next decade. Mark is also the President and co-founder of IAMG Hospitalists, a hospitalist company based in Los Angeles, Managing Partner of Avanti Hospitals, and President of Pipeline, a hospital management consulting firm. He sits on various boards including the Marconi Foundation, Huntington Beach Hospital, and Goals for Life.

Dr. Bell’s expertise is particularly strong in emergency department and in-patient efficiencies, customer service, paramedic outreach, strategic planning, and business development. He spends much of his time teaching physicians the skills required to succeed in administrative management and leadership. He has published on many topics, including pediatric cardiology, nutrition, and emergency medicine reimbursement, and frequently lectures on subjects most interesting to him such as The History of Nuclear Biological and Chemical Warfare, EMTALA, the Field Management of the Unknown Overdose, and the effect of efficient hospital care on morbidity and mortality. Dr. Bell is an active and entrepreneurial physician, hospital advocate, and represents his colleagues in issues on a regional and national level. When he’s not working, Dr. Bell enjoys surfing, cycling, and traveling with his family. He’s married to Dr. Camela Ott, and has two children Luke and Dominic.

Irv Edwards, M.D., FACEP

Principal
Dr. Irv Edwards obtained his Bachelor's Degree from McGill University and his Medical Degree from the University of Calgary in Alberta, Canada. He came to Los Angeles to pursue his interest in Emergency Medicine and interned at Los Angeles County Hospital. After his internship, Dr. Edwards completed his residency in Emergency Medicine at Harbor UCLA Medical Center.

Following his residency, Dr. Edwards pursued private practice at a variety of hospital sites in Los Angeles and Orange Counties including Chino Valley Medical Center, Encino-Tarzana Regional Medical Center, La Palma Intercommunity Hospital, Mission Community Hospital, Montclair Hospital Medical Center, Olympia Medical Center, Sherman Oaks Hospital, and Valley Presbyterian Hospital. He was the Director of Performance Improvement at Mission Community Hospital from 1998 – 2003 and he currently serves as the Director of Case Management at Mission Community Hospital and as the Chief of Staff at Chino Valley Medical Center. He is the Director of Emergency Services at Chino Valley Medical Center, Encino-Tarzana Regional Medical Center, Mission Community Hospital, and Montclair Hospital Medical Center.

In 1989, Dr. Edwards founded Emergent Medical Associates and has served as its President since inception. Since 2001, Dr. Edwards has been a dedicated member of CAL/ACEP and he currently sits on their Executive Board. He served as its President from 2005-2006.

G. Scott Brewster, M.D., FACEP

Chief Medical Officer
Dr. G. Scott Brewster received his undergraduate training at UC Santa Barbara. He graduated with his medical degree from Northwestern University in Chicago. In 1995 he returned to his native Southern California where he completed both an Internal Medicine and Emergency Medicine Residency at UCLA Medical Center. His final year he acted as Chief Resident for the UCLA/OVMC Residency Program. He is Board Certified in Internal Medicine and Emergency Medicine.

In 2000 he joined the Emergency Department faculty at Olive View - UCLA Medical Center where he served as an Assistant Clinical Professor, UCLA School of Medicine. He was the Director of Critical Care and Director of Medical Student Education. In 2001 he joined the Emergency Department Faculty at Cedars-Sinai Medical Center where he continued his administrative and academic pursuits. He joined EMA in 2003, becoming the Medical Director at the Providence Tarzana Emergency Department. He spent several years as the Director of Recruiting before moving into his current position as the Chief Medical Officer at IAMG.

Murlikrishna Kannan, M.D. FRCA

Managing Director
Currently serving as the Regional Director of Anesthesia at IAMG • Residency Trained at Seth GS Medical College and KEM Hospital, Mumbai, India • Previously served as the Director of Regional Anesthesia for Mt. Sinai Centre in Miami

Ari L. Nagler

Chief Executive Officer
Ari Nagler has spent the last two decades building high-performing teams and efficient companies in healthcare, service, retail and hi-tech. He's a previous business owner and M&A executive having closed over 50 transactions for himself and his clients. He possessess a B.S. degree with emphasis in Management and Organizational Development, from Cornell University.

Eugene Veksler

Chief Financial Officer
A member of IAMG management team since 2019, Eugene Veksler has oversight responsibilities for the finance function. Prior to joining IAMG staff, Eugene held various financial positions within Eisner Health, StarPoint Properties, The Walt Disney Company, and The Clorox Company. He holds a BS degree in Business Administration from the University of Southern California. Eugene graduated from a Health Care Executive Program at UCLA in 2013 and is scheduled to graduate from a Business Analytics Program at Harvard University by 2020.

Responsible for leading and managing all aspects of analytical reporting, project management and corporate initiatives • Previous experience in multi-national public and private organizations, leading financial operations on several continents • B.A. in Business Economics from UC Santa Barbara, M.B.A. in Finance from University of Colorado, Boulder.

Shannon Bonness, M.D.

Medical Director – Surgery Centers
Doctor Shannon Bonness attended Arizona State University for undergrad, studying Dietetics. Afterward, she received her medical degree from University of Nebraska College of Medicine. She completed her residency at the University of Nebraska Medical Center and has been practicing anesthesiology since 1992.

Magdalena Tesmer, M.D.

Medical Director - Sherman Oaks And Encino Hospital Medical Centers
Dr. Magdalena Tesmer received her a BS in Biology and minor in Psychology from the University of California, Irvine. Afterwards, she received her medical degree from Western University of Health Sciences. She then completed her residency at the University of Mississippi in 2015 and has been practicing anesthesiology in California since. In her spare time, she loves to dance, specifically country line dancing and latin dancing.

Vijaya Dukle, M.D.

Medical Director – Suburban Community Hospital
Doctor Vijaya Dukle attended T. N. Medical College, India. She completed her residency at BYL Nair Hospital, India and has been practicing anesthesiology since 1992.

Shruti Jayaram, M.D.

Medical Director – Suburban Community Hospital
Doctor Shruthi Jayaram, attended medical school at Ramaiah Medical College, India. She completed her residency at Temple University and has been practicing anesthesiology since 1999.

Brent Fox, M.D.

Medical Director – Roxborough Memorial Hospital
Doctor Brent Fox attended the University of Washington for undergrad, studying Zoology. Afterward, he received his medical degree from George Washington University School of Medicine. He completed his residency at Medical College of Virginia, Richmond and has been practicing anesthesiology since 1987.

Dominic Nguyen, D.O.

Medical Director - Chino Valley Medical Center & Montclair Hospital Medical Center
Doctor Dominic Nguyen attended the University of California, Berkley for undergrad, studying Biology. Afterward, he received his medical degree from the Western University of Health Science. He completed his residency at University California, Los Angeles and has been practicing anesthesiology since 2002.

Michael Christensen, D.O.

Medical Director – Corona Regional Medical Center
Dr. Michael Christensen studied Biology at Dixie State College and received his medical degree from Arizona College of Osteopathic Medicine. He completed his residency at the University of Kansas School of Medicine and has been practicing Anesthesiology since 2017. He loves to play sports including golf, tennis, baseball, and racquetball as well as spend time with his family outdoors in Southern Utah. Some fun facts about Dr. Christensen are that he lived in Chile for two years as a missionary and he is an Eagle Scout.