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

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 Benchmark Hospitalists, a hospitalist company based in Los Angeles 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.

Val M. Warhaft, M.D., ABEM

Dr. Val Warhaft received his Doctorate of Medicine from the University of Calgary, Alberta, Canada in 1977. His internship was completed at USC Medical Center, followed by a residency in Emergency Medicine at Harbor-UCLA Medical Center. Dr. Warhaft is Board Certified by the American Board of Emergency Medicine and has been a Fellow of the American College of Emergency Medicine since 1982. He has been affiliated with and privileged at facilities such as Memorial Medical Center of Long Beach, Cedar's Sinai Medical Center, Daniel Freeman Memorial Hospital, South Bay Medical Center, Mission Community Hospital, and Medical Center of North Hollywood.

In addition to having chaired or participated on several hospital committees, Dr. Warhaft has served as the director of the Department of Emergency Medicine at Mission Community Hospital of Panorama City, Medical Center of North Hollywood, and South Bay Hospital. His areas of expertise include quality assurance, risk management, emergency department systems and operations. Dr. Warhaft oversees special projects for EMA, and is focused on quality and length of stay improvement at EMA Facilities.

Irv Edwards, M.D., FACEP

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.

Muhammad Anwar, M.D.

Medical Director
Dr. Anwar earned his medical degree at Dow Medical College in Karachi, Pakistan; an internship and residency in internal medicine at Metropolitan Hospital in New York as the chief resident, and fellowship in pulmonary and critical care medicine at the New York Medical College in Valhalla, New York. Dr. Anwar is currently the chief medical officer at Encino Medical Center in Encino; Sherman Oaks Hospital Medical Center in Sherman Oaks, and member of the Pulmonary and Critical Care/Sleep Medicine Mid-Valley Pulmonary Medical Group in Sherman Oaks. He is board certified in Internal Medicine, Pulmonary & Critical Care, and Sleep Medicine. Since inception, he has been Benchmark’s medical director.

Scott Enderby DO, MMM, FACP

Chief Medical Officer
Dr. Scott F. Enderby earned his medical degree from the University of New England in Maine and did his undergraduate education at the University of Denver. Scott completed his Internal Medicine residency training at Kaiser San Francisco. Dr. Enderby has more than 20 years experience as a practicing Hospitalist as well as extensive training in Medical administration and leadership. Scott is a Senior Fellow in Hospital Medicine and a Fellow in the American College of Physicians. He obtained his Masters In Medical Management from the University of Southern California Marshall School of Business and was the previous founder/owner of Bay Area Hospitalist Associates where he developed a highly-integrated team that provided transitional care across the health care continuum including Intensivist, Hospitalists and Post-Acute care providers.

Dr. Enderby’s professional passions are in establishing highly functional, integrated teams and empowering them with the tools to delivery the best care possible to the patients we are privileged to serve.

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 Benchmark Hospitalists management team since 2019, Eugene Veksler has oversight responsibilities for the finance function. Prior to joining Benchmark Hospitalists 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.