ASHBURN ALLERGY, PLLC
NPI 1174039770
Allergy & Immunology in Ashburn, VA

Q: What is Ashburn Allergy, PLLC's NPI number?

The NPI number for Ashburn Allergy, PLLC is 1174039770. It was assigned to this organization in the NPPES registry on December 18, 2017.

Q: What is Ashburn Allergy, PLLC's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Active since December 18, 2017

20955 PROFESSIONAL PLZ STE 300, ASHBURN, VA 20147(571) 246-6323(888) 823-5456 Get Directions Write a Review

NPPES record last updated: August 24, 2018. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 24, 2018, Apr 27, 2018, Feb 13, 2018 and 1 more (4 updates tracked since 2017).

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About Ashburn Allergy, Pllc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ASHBURN ALLERGY, PLLC (NPI 1174039770) is a healthcare organization registered as an allergy & immunology in Ashburn, Virginia and active in the NPI registry since December 2017. The organization lists Jiun Yoon, Physician, as its authorized official.

NPPES Registry Identity

NPI1174039770

Entity TypeOrganization

Primary Taxonomy207K00000X

Legal Business NameASHBURN ALLERGY, PLLC

Location Address20955 PROFESSIONAL PLZ STE 300Ashburn, VA 20147

Mailing Address20955 Professional Plz Ste 300Ashburn, VA 20147-3405 · (571) 246-6323

Phone(571) 246-6323

Fax(888) 823-5456

Organization SubpartNo

Authorized OfficialJiun YoonPhysician · (571) 246-6323

Enumeration DateDecember 18, 2017

Last NPPES UpdateAugust 24, 20184 updates tracked since enumeration

✔ NPI 1174039770 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians

Taxonomy Code207K00000X

Definition

An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.

20955 PROFESSIONAL PLZ STE 300, Ashburn, VA 20147

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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ashburn Allergy, Pllc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Ashburn Allergy, PLLC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Jiun Yoon, MD

Allergy/Immunology

NPI 1548258783

20955 PROFESSIONAL PLZ STE 300
Ashburn, VA 20147

(571) 246-6323

✔ PECOS✔ Accepts MedicareSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ashburn Allergy, PLLC's NPI number?

The NPI number for Ashburn Allergy, PLLC is 1174039770. It was assigned to this organization in the NPPES registry on December 18, 2017.

Where is Ashburn Allergy, PLLC located?

Ashburn Allergy, PLLC is located at 20955 Professional Plz Ste 300, Ashburn, VA 20147. The listed phone number is (571) 246-6323.

What is Ashburn Allergy, PLLC's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Is Ashburn Allergy, PLLC enrolled in Medicare?

Yes. Ashburn Allergy, PLLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Ashburn Allergy, PLLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Allergy/Immunology) reassigns their Medicare billing to Ashburn Allergy, PLLC. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Ashburn Allergy, PLLC was last updated on August 24, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.