Learn about the doctors that power the next generation of urgent care clinics.

Walk into any Exer clinic any day of the week to have a physical exam. All Exer Urgent Care locations offer a full range of examinations to fit your needs.

Our Team

Our team of medical and healthcare experts help us serve more communities across Southern California.

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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.
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Dr. Rafael Montalvo
Site Medical Director, Porter Ranch &
Dr. Montalvo, hailing from Denver, Colorado, embarked on an exciting professional journey before finding his calling as a physician. He obtained his Mechanical Engineering degree from the Colorado School of Mines and worked as a Mechanical Engineer, an Elementary Math and Science teacher, and served as a Student Activities Director at John Jay College of Criminal Justice. He later pursued his medical education at the Latinamerican School of Medicine in La Habana, Cuba. Driven by a desire to blend his scientific knowledge with his passion for education and aiding others, he transitioned to the medical field. After completing his residency in UCLA Santa Monica Family Medicine, he embarked on a fulfilling career as a physician. When not tending to patients, he finds solace by the poolside, indulging in the soothing melodies of Latin jazz.
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Dr. Cameron Araghi
Site Medical Director, Santa Monica &
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.
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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.
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Dr. David Loya
Site Medical Director, Oxnard &
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Dr. Nazita Adili-Khams
Site Medical Director, Rancho Santa Margarita &
Dr. Khams, originally from Mashhad, Iran, pursued her educational journey across continents. She obtained her undergraduate degree from the University of Ottawa and ventured to Hungary to earn her Medical degree from Debrecen Medical School. Driven by a lifelong aspiration to become a physician, her passion for the healthcare industry stemmed from the desire to tackle challenges and deliver exceptional, compassionate healthcare within her community. It was her brother who first introduced her to Exer, as he had been a patient and spoke highly of his experience with the organization. Beyond her medical responsibilities, Dr. Khams finds joy in activities such as running, cooking, and traveling, which help her unwind and find inspiration.
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All Exer doctors are
Board certified emergency room doctors
Highly skilled professionals
Committed to improving the urgent care experience
We’re actively recruiting medical and healthcare experts to join us!
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Exer Urgent Care offers advanced care for everyday emergencies
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