girl in field

Dr. Kao is a board certified Allergist/Immunologist with offices in Rockville and Germantown.


The Allergy & Asthma Specialists offer our patients cutting edge medical care, delivered with kindness. We educate our patients--pediatric and adult--so they may learn about their diseases, and understand the potential benefits and risks of different treatments.

We see patients of all ages with allergic rhinitis, asthma, sinusitis, eczema, urticaria (hives), angioedema (swelling), itching, food allergies, drug allergies, bee sting allergies, and immunodeficiencies. We offer the following additional specialized services:

  • Scratch/Prick and Intradermal testing
  • Pulmonary Function testing
  • Patch Testing
  • Laboratory Testing
  • Immunotherapy (Allergy Shots)
  • Rush Immunotherapy (Rapid Desensitization)

We see patients by appointment, and we look forward to helping you.

Leon Kao, M.D.
Board Certified Physicians in Allergy & Immunology