What patients are saying
Overall rating
4.84
Average wait time
4.96
Bedside manner
4.85
“We love it, very good experience, everyone was nice and friendly and very professional, starting from the front desk ladies to Dr. Yoo and nurse that worked with him! They treated my daughter so nice, we felt they paid attention to our concerns and answered all our questions regarding my daughter’s symptoms and explained us everything regarding to her testing and next steps! ”
Hazel G.March 30, 2026
“I didn’t wait a second in the lobby, they brought me back after signing in right away. The MA and PA took detailed notes before the doctor came in. We all agreed on a plan for my care, and that allergy test panel was the quickest, easiest, painless process EVER!”
Initials hiddenMarch 25, 2026
About Dr. Jiun Yoon
**PLEASE EXPECT A PHONE CALL FROM THE PRACTICE TO CONFIRM INSURANCE INFORMATION UPON BOOKING**
*YOU MUST BE OFF ANY ANTIHISTAMINE MEDICATIONS FOR AT LEAST 7 DAYS BEFORE YOUR APPOINTMENT!*
Jiun Yoon, MD started Ashburn Allergy, PLLC, after eleven years of government service and six years in a private practice. During his distinguished military career, Dr. Yoon served as a Brigade Surgeon, staff internist, and Chief of the Allergy and Immunology service at Eisenhower Army Medical Center; including a deployment in support of Operation Iraqi Freedom. After completing his active duty service, he practiced at the Fort Belvoir Community Hospital and also trained future allergists at the Walter Reed National Military Medical Center. Prior to starting Ashburn Allergy, Dr. Yoon served as the lead physician for a large group allergy practice.
He completed his undergraduate degree at the Univ. of Michigan and earned his Doctor of Medicine from the Drexel Univ. College of Medicine. He completed his residency in Internal Medicine at Tripler Army Medical Center and fellowship in Allergy and Immunology at the prestigious Walter Reed Army Medical Center. He is board certified in Allergy/Immunology.
Dr. Yoon has been elected as a fellow of the American Academy (AAAAI) and the American College (ACAAAI) of Allergy Asthma and Immunology; as well as the American College of Physicians (ACP).
His approach to patient care incorporates many aspects of the core Army values including integrity, duty, honor, and respect to provide the highest quality care for patients of all ages.
Dr. Yoon grew up in the Washington, DC area and currently resides in Ashburn, VA with his wife and two children. He enjoys playing and watching a variety of sports, especially the Michigan Wolverines. Go Blue!!
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In-network insurances
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Medicare
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Office location
Education and background
Practice names
Hospital affiliations
- Inova Fair Oaks Hospital
- Inova Fairfax Hospital
- Inova Loudoun Hospital
Board certifications
- American Board of Allergy and Immunology
Education and training
- Medical School - Drexel University, Doctor of Medicine
- University of Michigan (Bachelor’s)
- Tripler Army Medical Center, Internship in Internal Medicine
- Tripler Army Medical Center, Residency in Internal Medicine
- Walter Reed Army Medical Center, Fellowship in Allergy and Immunology
Professional memberships
- American College of Allergy, Asthma & Immunology
- American Academy of Allergy, Asthma & Immunology
Awards and publications
- Castle Connolly Top Doctor
Languages spoken
- English
Provider's gender
Male
NPI number
1548258783
Patient reviews
All reviews have been submitted by patients after interacting with the practice.
Overall rating
4.84
Wait time
4.96
Bedside manner
4.85
Your trust is our top concern, so providers can't pay to alter or remove reviews. We also don't publish reviews that contain any private patient health information. Learn more here
492 reviews
Most relevant
Grateful for Dr. Yoon and his team. He helped advised a plan for my baby girls eczema and I couldn’t be more thankful.
June 6, 2025Naomi J.Verified patient
As a healthcare professional and as a mother, I would recommend Dr. Yoon in a heartbeat to anyone that needs an allergist.
July 16, 2024Trenton N.Verified patient
super friendly with my young son. No waiting time, clear directions and was great with my kid. Nothing better!
August 6, 2024Alden Y.Verified patient
Great experience! I look forward to my treatment plan with Dr. Yoon!
January 25, 2026Jeremy H.Verified patient
I called Dr. Yoon the day after the appointment. He was immediately available and answered all my questions.
August 21, 2024David S.Verified patient
Dr and staff extremely professional ,very congenial and willing to listen to all pts issues and treat accordingly .
September 20, 2023Patricia M.Verified patient
We had a great experience! The staff and doctor were friendly, efficient and extremely knowledgeable. Highly recommend!
January 5, 2023Cailin S.Verified patient
The staff was extremely communicative and kind. The doctor is very knowledgeable and helpful!
More than 1 year agoInitials hidden
Awesome! Dr. Yoon is very knowledgeable and passionate. Very nice, helpful and beautiful staff. Will definitely recommend.
May 5, 2021Dondra M.Verified patient
Great experience, kind staff. Very efficient, informative and respectful
October 6, 2025Brittany M.Verified patient
Very knowledgeable and amazing bedside manner. Friendly and knowledgeable staff as well. Would definitely visit him again.
November 19, 2018William B.Verified patient
Dr. Yoon was friendly and took time to answer all of my questions regarding my child, who has a food allergy.
July 18, 2023Caiden E.Verified patient
Super nice and friendly — and the office staff even knew my copay status for any lab work they drew, that was a first!
September 9, 2020Jessica P.Verified patient
This was a fantastic experience - especially considering that I received allergy testing. I highly recommend them.
February 8, 2022Mariah D.Verified patient
Dr. Yoon was knowledgeable, professional, and has a heart of a teacher. I would recommend him to family and friends.
More than 1 year agoRyan B.Verified patientVideo visit
Great experience all around! Friendly staff, knowledgeable people, and no wait time.
January 30, 2025Michael S.Verified patient
Great experience. Good times. I feel very comfortable at this office.
Less than 1 year agoInitials hidden
No wait time at all, very nice office staff. He was honest, thorough and pleasant to deal with. Highly recommended.
More than 1 year agoInitials hidden
Dr. Yoon and the nurse were both thorough and took time answering my questions.
March 4, 2025Gina Y.Verified patient
Very thorough and my condition was well explained and recommended follow-on appreciated.
October 30, 2024Timothy B.Verified patient
Doctor Yoon is highly knowledgeable and professional. Loved the way he explained everything in laymen’s terms.
December 6, 2021Anna K.Verified patient
Happy with the visit and information shared. Waiting for test results and follow-up call.
September 11, 2024Alexander B.Verified patient
Excellent doctor, very knowledgeable and helpful, I highly recommend him if you need to see an allergist!
More than 1 year agoMiranda P.Verified patient
This doctor is very kind and gentle. Understands patient concerns and gives advice appropriately.
February 21, 2024Shabana S.Verified patient
Very informational, very helpful. I was desperate and with the modifications the allergies will start decreasing.
More than 1 year agoGabriela M.Verified patient
Dr. Yoon and his staff were excellent - informative, efficient and thorough. I would absolutely recommend him.
More than 1 year agoMolly D.Verified patient
Dr Yoon and his staff are extremely friendly, accommodating and professional. I am enjoying my care here. - CW
August 3, 2018Initials hidden
This doctor and his staff are amazing. They made me feel heard and explained everything thoroughly.
February 21, 2023Liss R.Verified patient
The doctor is great with kids!! He did great with our 3 year old. He is very knowledgeable.
January 16, 2024Amelia S.Verified patient
I found the best allergy specialist (Jiun Yoon, MD) so, I don't need to worry about my allergy anymore!
July 22, 2020Yoonhwa J.Verified patient
Dr. Yoon was incredibly informative, helpful, and transparent regarding cost. I highly recommend him!
July 26, 2019Alan W.Verified patient
Straight up told me he couldnt help me. Had an attitude and was very just unpleasant
More than 1 year agoInitials hidden
Dr was great explaining my concerns.
Office staff was also great friendly and had no wait time.
December 29, 2021Tony A.Verified patient
Great doctor!! He listens, provides great details, and explains the treatment plan.
August 30, 2023Tarah S.Verified patient
Did not feel rushed during the appointment. Thoughtfully and thoroughly answered my questions.
April 10, 2017Initials hidden
Very personable and helpful. He explained fully when I asked questions. Very helpful doctor
January 7, 2020Amanda M.Verified patient
Checkin was quick and paperless. Their use of technology made the entire process seamless.
More than 1 year agoInitials hidden
Dr. Yoon is extremely knowledgable with a great bedside manner.
November 14, 2024Edward B.Verified patient
He is an excellent doctor!
Very informative and detailed.
Would definitely recommend him
August 3, 2013Isabella M.Verified patient
Very professional, pleasant and listened to my concerns. Good communicator.
September 11, 2023Sandra H.Verified patient
Great doctor, friendly staff, zero waiting time! What else can you ask for?
September 11, 2023Dinah A.Verified patient
Dr. Yoon is the best Doctor ever seen before.
He so nice and very kind and helpful.
November 15, 2021Yu M.Verified patient
I found the office very organized, leveraging digital check-ins. Great care team.
More than 1 year agoSridhar V.Verified patient
Seems like a good doctor who was straight-forward with me. I'd likely return again.
July 25, 2016Paul Z.Verified patient
Very knowledgeable and very nice ,staff as well very nice and very professional
April 15, 2020Tyisha B.Verified patient
All the staff are very nice and Dr Yoon is very professional and informative
More than 1 year agoCeren C.Verified patient
Dr. Yoon is amazing. Provided great advice & recommendations
March 12, 2024Jannette F.Verified patient
Very friendly and thorough. Would definitely go back if needed!
More than 1 year agoInitials hidden
He seemed very knowledgeable and gave great suggestions. Thanks
June 11, 2023Rachel L.Verified patient
Very friendly and took the time to explain everything. Felt very genuine.
September 12, 2018Initials hidden
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How soon can I make an appointment with Dr. Jiun Yoon?
Generally, Dr. Jiun Yoon has appointments available on Zocdoc within 1 week. You can see Dr. Yoon's earliest availability on Zocdoc and make an appointment online.
Is Dr. Jiun Yoon accepting new patients?
Dr. Jiun Yoon generally accepts new patients on Zocdoc. You can see Dr. Yoon's earliest availability on Zocdoc and schedule an appointment online.
Does Dr. Jiun Yoon accept my insurance?
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Can I make an appointment with Dr. Jiun Yoon online?
Yes, you can make an appointment online with Dr. Yoon using Zocdoc. It’s simple, secure, and free.
Which hospital is Dr. Jiun Yoon affiliated with?
Dr. Jiun Yoon is affiliated with Inova Fair Oaks Hospital, Inova Fairfax Hospital, and Inova Loudoun Hospital.
What practice does Dr. Jiun Yoon work with?
Dr. Jiun Yoon works with Ashburn Allergy, PLLC.
Where is Dr. Jiun Yoon's office located?
Dr. Jiun Yoon's office is located at 20955 Professional Plz, Ashburn, VA 20147.
Which board certifications does Dr. Jiun Yoon have?
Dr. Jiun Yoon is certified by American Board of Allergy and Immunology.
What are common reasons for patients to see Dr. Jiun Yoon?
Dr. Jiun Yoon frequently sees patients for Allergy Consultation, Allergy Testing, Asthma, Eczema, and Flu Shot. You can see other visit reasons for Dr. Jiun Yoon on their profile.
What languages does Dr. Jiun Yoon speak?
Dr. Jiun Yoon speaks English.
How do patients rate Dr. Jiun Yoon in reviews?
492 patients have reviewed Dr. Jiun Yoon. The overall rating for this doctor is 4.84/5. They have a 4.85/5 rating for bedside manner and a 4.96/5 rating for wait time. You can read individual reviews and ratings on their profile.