Dr. LeSon has been practicing medicine and providing care to patients in Garden Grove and the surrounding communities for nearly 30 years. His practice encompasses allergy, asthma, sinus and respiratory care, immunology, internal medicine, and urgent care.
His approach focuses on listening to patients, understanding the factors contributing to their health concerns, and developing practical, evidence-based treatment strategies tailored to each individual.
Care Areas
–Immunologic Disorders: Management of overactive immune systems (e.g., asthma, eczema, rhinitis), autoimmune disorders (e.g., diabetes, rheumatism, lupus), and systemic inflammatory diseases (e.g., atopic dermatitis (eczema), psoriasis, obesity, and metabolic syndrome).
–Allergy, Asthma & Respiratory Care: Diagnosis and treatment of asthma, allergies, chronic nasal and sinus issues, and related immune disorders.
–Internal Medicine & Family Medicine: Providing adult and pediatric primary care, including preventive care and chronic disease management.
–Nutrition & Wellness: Offering evidence-based nutrition counseling, sports medicine, and women’s health services.
–Acute Care: Extensive experience in emergency and urgent care medicine.
Education & Public Health
Dr. LeSon’s medical practice is informed by a background in engineering, medicine, and public health. He holds an engineering degree and multiple graduate degrees in public health from the University of Illinois. His academic training includes aerospace bioengineering, environmental and occupational health, industrial hygiene, and epidemiology. He has received clinical training in internal medicine, asthma and allergy, rhinology, and clinical laboratory immunology.
His research on back pain contributed to the development of a new educational program for occupational low back pain and injury prevention for the National Safety Council.
His work on the health effects of secondhand smoke and asthma has added to the growing body of evidence regarding environmental tobacco smoke and has informed California’s formulation of smoke-free workplace legislation, including AB13.
Outside of Medicine
Dr. LeSon has a long-standing passion for physical activity and the outdoors. During the summers, he has gone on solo wilderness backpacking trips and has taught youth groups emergency survival skills and wilderness first aid.
He is also a double-certified wrestling and judo coach with many years of experience teaching and mentoring young athletes. He homeschooled his children and remains a strong advocate for education, discipline, curiosity, and lifelong learning. He continues to support their dreams and academic journeys at Brown, Cornell, Tufts, and Vanderbilt University.
“Gratitude, humility, and curiosity are the foundation of a meaningful life.”
Care of Patients
“Good medical care starts by listening and taking the time to understand each patient,” Dr. LeSon states. Whether treating allergies and respiratory conditions, managing chronic medical issues, or providing primary and acute care, his goal is to deliver thoughtful, evidence-based care tailored to each patient’s needs.
If you want to see some of the medical treatments that Dr. LeSon treats, see below some more pages.