Allergy Asthma & Sinus Center | Leesburg | Sterling | Purcellville VA
Allergy and Immunology • Leesburg, VA
Clinic Type
Allergy and Immunology
Address
—
Phone
(703) 726-9720
safa@novaadvertising.com
Opening Hours
Not published — contact the clinic to confirm hours.
Website
Services Offered
Insurance & Payment
—
Languages Spoken
—
Social Media
Photos








What Patients Say
Overall sentiment across review platforms: mixed
- WebMD: 1 out of 5 (on WebMD) (1)
- Yelp/MapQuest: 2 out of 5 (on Yelp/MapQuest) (1)
Patients praise
- compassionate and knowledgeable physicians
- effective treatment plans for allergies, asthma, and skin conditions
- staff described as friendly and welcoming in many instances
- thorough explanations of testing procedures and results
Common complaints
- perceived "weaselly" or "shady" business practices related to billing for forms and phone consultations
- reports of unreturned phone calls
- unfriendly interactions with staff regarding scheduling errors
"The quality of care is fine and acceptable, but the business practices that we always felt were weaselly have turned shady. We've been coming here for years... and were always frustrated that we had to pay each school year for the doctor's signature on the required school forms. It got worse now when we were forced to pay a second co-pay for the allergist to share the lab results of a blood test over the phone."
— Patient review on LocalityBiz"Doesn't return phone calls. Unsure why they would want to do business."
— Patient review on WebMD"Dr. Thai has been a delight to work with over the last several years. With her guidance she has coached me on controlling my asthma and breathing issues. I believe she gets as much pleasure out of my improvement as I do!"
— Patient review on LocalityBizSynthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].
In the News
- Allergy Asthma & Sinus Center | Leesburg | Sterling | Purcellville VA — Jun 17, 2024
- Contact Us | Allergy, Asthma & Sinus Center | Leesburg | Sterling | Purcellville VA — Jun 25, 2024
- Allergist Leesburg VA | Allergy, Asthma & Sinus Center — Nov 20, 2025
- About | Allergy Asthma & Sinus Center | Leesburg VA — Nov 7, 2025
Information sourced from the clinic's website as of July 11, 2026.
More allergy and immunology clinics in Leesburg
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Ashburn Allergy, PLLC is a pediatric and adult allergy, asthma, and immunology clinic based in Ashburn, VA (Loudoun County). They treat all ages with evidence-based testing and personalized care plans. Key details relevant to your Leesburg search: - Location: Headquarters in Ashburn, VA; three office locations in the United States (all in Ashburn, VA area). - Services: Allergy and immunology care for food and environmental allergies, asthma testing and management; family-friendly clinic; electronic medical records; in-network with major insurances. - Team: Board-certified allergist/immunologist (Jiun Yoon, MD) plus nurses and medical staff. - Contact: Phone (571) 246-6323; emails info@ashburnallergy.com. - Availability: Appointments offered; hours and notices/updates available on their site. Note: The website does not list Leesburg-specific offices or physicians; closest location appears to be Ashburn, VA. If you need an allergist specifically in Leesburg, you may want to contact them to confirm if they serve Leesburg patients or to get recommendations for nearby Leesburg-area providers.
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