Meet Exer’s Doctors

Dr. Brian Harris

Site Medical Director, Rolling Hills Estates &

Growing up in a military family, Dr. Harris enjoyed a global upbringing. He obtained his medical degree from UC San Diego School of Medicine and successfully completed an Emergency Medicine Residency. Notably, during his college years, Dr. Harris professionally competed at the Olympic Distance Triathlon. He’s been a lifeguard, paramedic and ER doctor. At Exer, he finds great satisfaction in providing exceptional healthcare to patients who genuinely appreciate it. Outside of his professional commitments, Dr. Harris relaxes by hiking, going on runs with his four-legged companion, and surfing.

Dr. Cameron Araghi

Site Medical Director, Santa Monica – Wilshire Blvd &

Dr. Araghi, a Los Angeles native, earned his undergraduate degree from UC Santa Cruz and went on to graduate from Chicago Medical School. He successfully completed his Emergency Medicine Residency at Harbor UCLA. Driven by a desire to make a meaningful impact and help his community, he found his calling in healthcare. Working at Exer brings him immense satisfaction as he can attend to patients with higher acuity levels and proactively prevent emergency department visits. During his leisure time, Dr. Araghi plays soccer and relishes spending time with his wife.

Dr. Maryann Trephan

Site Medical Director, Westlake Village &

Dr. Trephan, born and raised in Covina, California, obtained her medical degree from Jefferson Medical College before embarking on an accomplished journey in the field of medicine. She completed an Emergency Medicine Residency and a Pediatric Emergency Medicine Fellowship. Throughout her 27 years of experience, she has honed her expertise in emergency medicine as well as pediatric emergency medicine. The inspiration to pursue a healthcare career stemmed from her mother, who served as a physician herself. Driven by a deep sense of connection to the community, she joined Exer Westlake Village. Her children were raised in Westlake Village and attended school there. When not engaged in her medical duties, Dr. Trephan enjoys gardening and fun-filled family vacations.

Dr. David Loya

Site Medical Director, Oxnard &

Dr. Mai Lai

Site Medical Director, Torrance – PCH &

Dr. Lai, a Los Angeles native, has been practicing as a board-certified emergency medicine physician in Southern California since 2005. She obtained her bachelor’s degree from UCLA and her medical degree from Michigan State University, where she also completed her Emergency Medicine Residency. Throughout her education and training, she had the opportunity to travel across the United States. During this time, she witnessed the resilience and kindness that emerged from the tragic events of 9/11, which further solidified her commitment to pursuing a career in emergency medicine. During her leisure time, she enjoys exploring different parts of the world, hiking in national parks, swimming with manatees, and scuba diving with hammerhead sharks.

Dr. Kent Shoji

Site Medical Director, Playa Vista &

Dr. Shoji, hails from the San Fernando Valley, possesses extensive expertise in emergency medicine and has made significant contributions to urgent care. He earned his medical degree from the Medical College of Wisconsin, and completed his residency in Emergency Medicine. He is an ER-board certified physician and has served as an ABEM examiner since 1984, actively contributing to the certification of emergency medicine practitioners. His instrumental role in establishing one of the earliest Emergency Medicine Residency Programs at Harbor-UCLA Medical Center highlights his commitment to shaping the future of the field. Throughout his remarkable 37-year career, he has demonstrated unwavering dedication to teaching, mentoring, and ensuring the proficiency of emergency physicians. Beyond his professional accomplishments, Dr. Shoji leads a vibrant personal life with diverse interests such as home repair, fishing, travel, art history, and a passion for auto racing.

Dr. Jeffrey Laterreur

Site Medical Director, Huntington Beach &

Dr. Laterreur, a native of southern California, holds an undergraduate degree from UC Irvine and a medical degree from the American University Medical School. He specializes in Primary Medicine with a subspecialty in Emergency Medicine. Prior to pursuing medicine, he worked as a Commercial Real Estate Broker for the world’s largest brokerage firm. Dr. Laterreur joined Exer for its patient-centered approach to healthcare and the freedom to practice medicine his way. During his free time, he enjoys spending quality time with his family at the beach.

Dr. David Zohrabian

Site Medical Director, Tarzana &

Dr. Zohrabian once thought he’d be an astronaut, but luckily redirected his passion towards medicine and the pursuit of improving human health. He obtained an undergraduate degree in Microbiology from UC San Diego and then went on to earn his medical degree from Chicago Medical School. Dr. Zohrabian completed his residency in Emergency Medicine at The Brooklyn Hospital Center. Alongside his expertise in Emergency Medicine, he possesses an impressive background in biological studies, particularly focusing on the advancements and innovations in longevity. Outside of his medical endeavors, he finds joy in gardening and skiing, while cherishing quality time with his wife and three wonderful daughters.

Dr. Brian Webb

Site Medical Director, Sherman Oaks &

Dr. Cory Spurlock

Chief Medical Officer, Irvine &

Dr. Zacary Schwarzkopf

Site Medical Director, Silver Lake &

Dr. Schwarzkopf, a Los Angeles native, was initially led to medical school on a dare from his friends, and they couldn’t have anticipated the passion he would have for medicine. He completed his undergraduate degree at the University of California, Santa Barbara and went on to receive his medical degree at the Medical College of Wisconsin. He completed his residency in Emergency Medicine from Hahnemann University Hospital. After considering pediatric care, one chaotic night shift in the ER changed everything for him. He has since devoted his career to emergency medicine. In his free time he enjoys exploring new places, playing board games, and cheering on LA sports teams.

Dr. Abel Ramos

Site Medical Director, Northridge & West Hills &

Dr. Rosanne Kay

Site Medical Director, Manhattan Beach &

Dr. Kay attended the Mercer University School of Medicine, and completed her emergency medicine residency at the University of Florida. She has been practicing emergency medicine just shy of 30 years. Her dedication to her patients is evident in the multiple leadership roles she has held over the years, including being a board examiner for the American Board of Emergency Medicine and Chairman of the Department of Medicine and Emergency Department Medical Director for Marina Del Rey Hospital. Dr. Kay currently resides in the South Bay with her husband and two children. When she’s not working, Dr. Kay enjoys playing gold, tennis, and taking family vacations.

Dr. Kelly Katzberg

Site Medical Director, Stevenson Ranch &

Dr. Katzberg, originally from Riverside, California holds a medical degree from the University of Southern California. She completed her residency at USC Emergency Medicine and a fellowship in Forensic Emergency Medicine. Driven by her passion for helping others and teaching, she pursued a career in medicine. At Exer, she loves the meaningful interactions she can have with patients. When not working, Dr. Katzberg enjoys reading, hiking, and watching movies.

Dr. David Kalmanson

Site Medical Director, Westwood &

Dr. Kalmanson, born and raised in Santa Monica, is an Emergency Medicine Board Certified physician. He earned his medical degree from UCLA Medical School and completed his residency at Harbor UCLA Medical Center. The pivotal moment that ignited his passion for medicine occurred when he was just 15 years old, witnessing a motorcycle accident and the helplessness of the bystanders. Driven by the desire to intervene and make a difference, he committed himself to a career in emergency medicine that transcended borders, enabling him to become fluent in French and Spanish. His patient-care philosophy revolves around a simple yet profound approach: listen attentively, conduct thorough examinations, educate patients, and extend unwavering compassion. When he’s not working, Dr. Kalmanson cherishes precious moments with his family, cooking, and nurturing his green thumb in the garden.

Dr. Patricia Gillis

Site Medical Director, Newbury Park &

Originally from the San Fernando Valley, Dr. Gillis’ journey into the medical field began during her college years, where she found her true passion. She earned her medical degree from Loma Linda University School of Medicine, and later completed her Emergency Residency at Harbor-UCLA Medical Center. Dr. Gillis also dedicated her time to valuable medical volunteer work, undertaking missions in both Kenya and Guatemala. When not immersed in her medical pursuits, she enjoys outdoor winter and summer sports, and finding solace in the pages of the newest National Geographic magazine.

Dr. Robin Kaminsky

Site Medical Director, Marina Del Rey &

Dr. Kaminsky, hailing from San Antonio, Texas, is an Emergency Medicine Board Certified physician. She obtained her bachelor’s degree from Stanford University and pursued her Medical degree at Colorado School of Medicine. Her residency in Emergency Medicine was completed at Harbor-UCLA. From a young age, Dr. Kaminsky aspired to become a physician, driven by her desire to provide compassionate medical care to her patients. At Exer, she appreciates the opportunity to administer the type of healthcare she would want her own family and friends to experience. During her downtime, you can find Dr. Kaminsky cycling, birding, or hiking.

Dr. Donald Dawes

Site Medical Director, Camarillo &

Dr. Dawes, a Northern Virginia native, is an accomplished board-certified emergency physician with over 23 years of experience in the healthcare industry. He earned his undergraduate degree in engineering from Cornell University and medical degree from Duke University. Prior to joining Exer, he served as a tactical physician on the California SWAT team. He continues to be a consultant for TASER International and has become one of the world’s experts on the medical effects of TASER weapons—publishing a book, dozens of papers and lecturing globally on the subject. Dr. Dawes is also in his 17th year as a reserve officer with the Santa Barbara Police Department, and previously served as an Emergency Medicine Physician at Lompoc Valley Medical Center. When he’s not working, he enjoys spending time with his family and pets, and riding horses in Wyoming during the summer months.

Dr. Leif Lunsford

Site Medical Director, Culver City – 8985 Venice Blvd &

From his first emergency room rotation while at UC Davis medical school, Dr. Lunsford knew the fast-paced, action-oriented physicality of the ER was exactly what he wanted to do. He completed his residency at USC Emergency Medicine. Several years later, he made an impactful connection with the founders of Exer Urgent Care. Dr. Lunsford was a key contributor to the care model and high standards that the company is known for today. When he’s not working, he swims, loves to travel (has two Grand Canyon Rim-To-Rim hikes under his belt), snowboard, and improve his cooking skills.

Dr. Michael Pham

Site Medical Director, Calabasas – Agoura Rd &

Dr. Pham, hailing from Northridge, graduated from the American University of the Caribbean School of Medicine and completed his residency at Mercy Hospital in Pennsylvania. He earned an electrical engineering degree from UCLA before pursuing medicine. Driven by his passion for improving people’s lives, he pursued a career in medicine. Dr. Pham chose to work at Exer for its excellent support system and reputation as a fast-growing company. During his leisure time, he enjoys listening to music, watching movies, and working on his backyard.

Dr. Britt Durham

Site Medical Director, Redondo Beach &

Dr. Durham, a proud local of the San Fernando Valley, was propelled towards the medical field by a deep desire to contribute to something greater than himself. He obtained his bachelor’s degree from Cal State Northridge and pursued his Medical degree at UCLA. Driven by his passion for Emergency Medicine, he completed his residency at Texas Tech University. Remarkably, during his time in college, he also served as a physician in Guatemala, further expanding his medical experiences and global perspective. Opting to join Exer, Dr. Durham was drawn to the opportunity to be part of a local team while benefiting from a culture that nurtures innovation and imagination. Dr. Durham finds enjoyment and relaxation by engaging in his diverse hobbies, including playing music, flying planes, surfing, and golfing.

Dr. Alireza Raboubi

Site Medical Director, Costa Mesa &

Dr. Raboubi, a native of Woodland Hills, earned his medical degree from Ross University School of Medicine and completed his residency at the Medical College of Wisconsin. Dr. Raboubi’s passion for helping others was ignited at the age of 9 when he assisted in caring for his grandmother. This desire to make an impact continued into adulthood and he started a math tutoring company to assist those struggling in the sciences. Later he practiced behavioral therapy. He joined Exer because of its high acuity urgent care, and ability to provide emergency department-level care in a comfortable environment. During his free time, Dr. Raboubi enjoys spending quality time with his wife and three children, practicing taekwondo, and enjoying the outdoors.

Dr. Asbasia Mikhail

Site Medical Director, Pasadena – East Del Mar Blvd & La Canada Flintridge &

Dr. Mikhail, originally from Cairo, Egypt, moved to the U.S. in the early ‘70s with her family. She received her undergraduate degree from the University of Southern California and her graduate degree from Wake Forest University School of Medicine. She completed her residency at the King Drew Emergency Medicine Program and a Fellowship in Forensic Emergency Medicine. Besides leading as Site Director at Exer Pasadena and La Canada Flintridge, she stays on the cutting edge of emergency medicine while serving as the Medical Director for Huntington Urgent Care Medical Group (HUCMG). Dr. Mikhail is also fluent in English, Spanish, and Arabic. When not practicing medicine, she keeps busy with traveling, cooking, dancing, and staying fit.

Our Team