Our Team

Michael DeYoung, MD, of LaSara Medical Group with locations in Sawtelle of Los Angeles, Tustin of Orange County, and Encinitas of San Diego, California, was born in Peoria, Illinois, where he attended the nearby University of Illinois for his undergraduate studies. After graduating, he spent two years serving in the Peace Corps, working on a project that brought portable water to the people of Thailand. After returning to the United States, he completed medical school at Georgetown University in Washington, D.C., graduating in 1974.

Dr. DeYoung then moved to California to complete his residency in internal medicine at Cedars-Sinai Medical Center in Los Angeles. After completing the three-year residency, he completed a second residency at Los Angeles County+USC Medical Center, this time studying emergency medicine.

A fellow of the American College of Emergency Physicians, Dr. DeYoung has worked extensively in emergency medicine for over four decades. Now, as the medical director of LaSara Medical Group, with Southern California offices in the Sawtelle neighborhood of Los Angeles as well as Tustin, California, he brings his wealth of experience to his treatment of men’s sexual health, pain management, and aesthetics with a detailed approach perfected by his years of work in emergency medicine.

Lea, is a Nurse Practitioner with an extensive background in critical care. With a focus on high-acuity settings such as Neuro/Trauma and Cardiovascular Intensive Care Units, Lea’s expertise shines as an Extracorporeal Membrane Oxygenation Specialist RN. Moreover, she brings her wealth of experience to collegiate-level nursing education for critical care students.

Lea’s academic journey led her to a Masters of Science in Nursing and Adult/Geriatric Nurse Practitioner Certification from West Coast University’s MSN-AGNP program. During clinical rotations and continued education, her true passion emerged for Obesity and Osteopathic Medicine. Lea’s dedication to obesity and weight loss medicine sets her apart, as she combines her clinical acumen with a compassionate approach to help individuals achieve their health goals in these areas.

Committed to patient education and advocacy, Lea ensures every individual receives optimal care. Beyond her professional dedication, she finds joy in pilates, cherished moments with loved ones, and exploring the captivating Mammoth Mountain through hiking and snowboarding.

Mark is the swiss knife of LaSara Medical Group. He is intimately involved in the beginning stages of becoming a patient and provides educational resources to new patients about all of our treatments. He is well studied and offers a unique outlook on how to best achieve short-term and long-term health goals.

Mark is a graduate of UCLA and further studied at Cal State Fullerton during his time in school. He has management and business operations experience across a variety of industries including medical, cosmetology, and advertising.

Outside of the medical office, Mark feeds his creativity by remodeling interiors of homes in the local area. He is an avid mountain biker, weight lifter, golfer, and tech guy.

Fernando began working in medicine in 2013. For more than 10 years, he has pursued continued education and work experience in Internal Medicine, Pain Management, Occupational Health, Urgent Care, and Urology. As a student of Nursing, he takes pride in developing his medical abilities and will eventually become a Registered Nurse.

Today, Fernando manages the Orange County office of LaSara. He is a true asset to LaSara and to our patients. His passion and knowledge in fitness, diet, pain management, and men’s health has provided him the ability to support LaSara’s patients as they work to make improvements in their own health and life.

Fernando is a proud father of two children. In his free time, you can find him caring for his family, exploring California’s wildlands, playing pickleball, and focusing on his fitness.

Lauren is your dedicated partner to help you transform your health and well-being. Her fervor lies in tailoring comprehensive solutions that transcend mere treatments – she crafts empowering transformations with the support of LaSara’s professional medical team. A compassionate listener, she unravels personal aspirations and specializes in curating the perfect path to vibrant health.

Outside of the office, Lauren is a fitness and health fanatic! She loves to travel with her boyfriend, visit the beautiful California destinations, and live every day to the fullest. She enjoys creating connections with others in her community and growing her life in Southern California.

Viviana began her professional medical journey in 2021, immersing herself in the field as a Medical Assistant and skilled Phlebotomist. Her practical experience encompasses delivering injections, conducting blood draws, and delivering empathetic care to those in need of health support. Her commitment to medicine and patient welfare harmonizes with a vibrant personal life – her true passion is embarking on global escapades with loved ones and cultivating personal growth through invigorating workouts, fostering both physical and mental well-being.

Meet Jessica Hallett, a seasoned professional with more than 20 years of expertise in the medical profession. She is a lead Medical Assistant and Logistic Manager at LaSara Medical Group. With a passion for patient support, Jessica thrives in creating a positive impact on individuals’ well-being. Her dedication extends beyond the workplace, as she actively promotes healthy living and disease prevention in community outreach.

Driven by the philosophy of the power of positive thinking, Jessica firmly believes that cultivating robust relationships forms the bedrock of her success. Her career is a testament to the significance she places on building and nurturing connections. Beyond the office, Jessica finds joy in the company of her grandson and shares adventurous moments hiking or paddleboarding with her loyal canine companion, Helios.