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About

Ashburn Allergy, PLLC is a pediatric and adult allergy, asthma, and immunology clinic based in Ashburn, VA ( Loudoun County) with three offices in the area. Key points relevant to successful allergy treatment in VA: - Services: Comprehensive allergy evaluation and treatment for food and environmental allergies, asthma testing, and personalized care plans using current evidence-based guidelines. - Team: Board-certified allergist/immunologist (Jiun Yoon, MD) plus skilled nurses and medical assistants. - Patient focus: Serves all ages; aims to involve patients in their care and tailor plans to individual needs. - Accessibility: In-network with many major insurers; electronic medical records for secure, efficient care; appointments and contact info available. - Contact: (571) 246-6323 for scheduling and insurance details. - Location: HQ at 20955 Professional Plaza, Suite 300, Ashburn, VA 20147, with additional offices in the area. Note: The clinic emphasizes evidence-based testing and personalized treatment to manage allergies and asthma effectively in Virginia. If your goal is treatment specifically in Herndon, VA, you may want to contact Ashburn Allergy to confirm nearest location or consider proximity within the greater Northern Virginia area.

Clinic Type

Allergy and Immunology

Address

Ashburn, VA (Loudoun County area)

Phone

246‑6323 during regular business hours

Email

info@ashburnallergy.com

Opening Hours

Regular business hours (not specified)

Services Offered

  • allergy treatment
  • asthma testing
  • immunology
  • pediatric allergy
  • adult allergy
  • environmental allergy
  • food allergy
  • testing and evaluation
  • care planning
  • board-certified allergy doctor
  • allergy and immunology clinic

Technology & Equipment

  • state-of-the-art testing
  • evidence-based guidelines
  • online ZocDoc scheduling
  • Healow platform
  • various online testimonials/reviews

Team

  • Dr. Yoon, Board-certified allergist/immunologist — Board-certified pediatric and adult allergist/immunologist

Insurance & Payment

Notice: One of our vendors was impacted by a security incident, which affected some of our patients’ or their primary insured’s protected health information. Learn more.

Languages Spoken

  • English

FAQs

What services does Ashburn Allergy offer?

Allergy, asthma, and immunology evaluation and treatment for both pediatric and adult patients.

Social Media

Photos

What Patients Say

Overall sentiment across review platforms: mixed

  • Zocdoc (Allergy Partners Herndon-Reston): 4.83 out of 5 stars (53 reviews)
  • Healthgrades (Dr. Ngoc Vu): 3.3 out of 5 stars (26 reviews)
  • US News & World Report (Dr. Ngoc Vu): 5 out of 5 stars (aggregated) (116 reviews (aggregated))
  • WebMD (Dr. Ngoc Vu): 5 out of 5 stars (10 reviews)
  • FindaTopDoc (Dr. Ngoc Vu): 4 out of 5 stars (20 reviews)

Patients praise

  • Patients often describe doctors as thorough and knowledgeable in allergy and immunology
  • Many appreciate clear explanations of conditions, treatment plans, and use of visual aids for education
  • Clinical approach is frequently noted as data-driven and investigative
  • Staff are often praised for being friendly, accommodating, and warm
  • Successful long-term management of allergies and asthma, with some patients citing life-changing results from treatments like allergy shots

Common complaints

  • Reports of long wait times for appointments
  • Occasional dissatisfaction with bedside manner or communication style
  • Frustration regarding specific practice policies or scheduling issues
  • Some allegations of poor service or communication in specific instances

"For the first time in years, I can enjoy the seasons again without the constant struggle that used to affect my quality of life. The entire staff is warm, welcoming, and incredibly thorough."

Allergy Partners of Herndon-Reston Review

"I was on time for my follow up. She was an hour late. They tried to put me in exam room even though she still had two, 2! Other patients before me... Bedside manner ZERO."

Healthgrades Review of Dr. Ngoc Vu

Synthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].

Information sourced from the clinic's website as of July 11, 2026.

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