For over 30 years, Dr. LeSon has supported Garden Grove families and nearby communities. Specializing in allergy, asthma, sinus care, and internal medicine, Dr. LeSon provides expert care with deep compassion. Building on this commitment, he offers a wide range of expertise to address your family’s evolving health needs.

Comprehensive Medical Expertise

Dr. LeSon offers personalized, root-cause care tailored to each patient, drawing on a broad spectrum of health disciplines. His expertise includes:

• Respiratory & Allergy Care: Advanced treatment for asthma, sinus conditions, rhinology, and immunology.
• Internal Medicine: Comprehensive primary care for both adults and children.
• Holistic Wellness: Evidence-based nutrition consulting, sports medicine, and women’s health.
• Acute Care: Decades of reliable experience in emergency and urgent care medicine.

A Foundation of Innovation and Public Impact

Dr. LeSon’s unique background merges engineering, public health, and advanced medical science—enabling innovative approaches to patient health that few other doctors provide.

• Advanced Education: He holds an engineering degree alongside advanced degrees in public health from the University of Illinois. This background gives him a specialized edge in clinical laboratory immunology, environmental and occupational health, biostatistics, and epidemiology.
• Public Health Legacy: Dr. LeSon’s groundbreaking research on the effects of secondhand smoke on asthma earned widespread acclaim and directly influenced the development of California’s historic smoke-free workplace law (AB 13).

Life Beyond the Clinic

Dr. LeSon sees true health as an adventure. Beyond patient care, he actively pursues a passion for lifelong learning, physical discipline, and exploration.

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

• The Adventurer: He has completed extreme wilderness solo treks and has taught emergency survival skills and wilderness first aid.
• The Coach & Educator: A dual-certified wrestling and judo coach and lifelong educator, he homeschooled his own children, fostering the core values that eventually led them to achieve success at some of the country’s most prestigious universities.

Ready to Welcome Your Family

At the core of his philosophy, Dr. LeSon is dedicated to continuous learning, teaching, and putting patient care first. Whether you face chronic seasonal allergies or are looking for a dedicated family doctor, he is here to guide your wellness journey.

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.