For more than 30 years, Dr. LeSon has provided medical care to patients in Garden Grove and surrounding communities. His practice includes allergy, asthma, sinus, and respiratory care, internal medicine, and acute care.

His approach is based on listening to patients, understanding the factors contributing to their health concerns, and developing practical, evidence-based treatment plans tailored to each individual.

Areas of Care

• Allergy, Asthma & Respiratory Care: Evaluation and treatment of asthma, allergies, chronic sinus and nasal conditions, and related immune disorders.
• Internal Medicine & Primary Care: Medical care for adults and children, including preventive care and management of chronic conditions.
• Nutrition & Wellness: Evidence-based nutrition counseling, sports medicine, and women’s health.
• Acute Care: Wide experience in emergency and urgent care medicine.

Education & Public Health

Dr. LeSon’s medical practice is informed by a background that includes engineering, medicine, and public health. He holds an engineering degree and advanced degrees in public health from the University of Illinois. His academic training included environmental and occupational health, biostatistics, and epidemiology. His clinical training included internal medicine, asthma, allergy, rhinology, and clinical laboratory immunology.

His research on the health effects of secondhand smoke and asthma contributed to the growing body of evidence regarding environmental tobacco smoke and helped inform California’s development of smoke-free workplace legislation, including AB13.

Outside of Medicine

Dr. LeSon has a longstanding interest in teaching, physical activity, and the outdoors. He has participated in solo wilderness expeditions and has taught emergency survival skills and wilderness first aid.

He is also a dual-certified wrestling and judo coach and has spent many years teaching and mentoring young people. He homeschooled his children and continues to value education, discipline, curiosity, and lifelong learning. He continues to support their dream and their academic path at Brown, Cornell, Tufts, and Vanderbilt University.

“Gratitude, humility, and curiosity are the foundations of a fulfilling life.”

Patient Care

Dr. LeSon believes that good medical care begins with listening and taking the time to understand each patient. Whether treating allergies and respiratory conditions, managing ongoing medical concerns, or providing primary and acute care, his goal is to provide thoughtful, evidence-based care appropriate to each patient’s needs.

Education

• Medical School: Kirksville College of Osteopathic Medicine
• Postgraduate (Obstetrics-Gynecology): Columbus-Cabrini Hospital, Northwestern University
• Postgraduate (Occupational Medicine): Memorial Hospital, Columbia University School of Public Health
• Residency (Internal Medicine): Carney Hospital, Boston University
• Fellowship (Allergy and Clinical Immunology): University of California Davis Medical Center
• Fellowship (Clinical and Laboratory Immunology): University of California Irvine Medical Center

Professional Memberships & Affiliations

• American Academy of Allergy, Asthma, and Immunology (AAAAI)
• American College of Allergy, Asthma, and Immunology (ACAAI)
• California Society of Allergy, Asthma, and Immunology (CSAAI)
• American Osteopathic Association (AOA)
• American College of Osteopathic Internists (ACOI)

If you want to see some of the medical treatments that Dr. LeSon treats, see below some more pages.