Jiun Yoon, MD

Primary specialty

Allergy & Immunology PhysicianTaxonomy code 207K00000X

License

0101246979 Issued in VA

Practice address

20955 Professional PLZ Ste 300
Ashburn, VA 20147

Phone

(571) 246-6323

Fax

(888) 823-5456

NPI assigned

Oct 12, 2005

Last updated

Jan 20, 2026By the provider in NPPES

Sex

Male

Sole proprietor

Yes

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Enrolled in VA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Allergy/Immunology

Education

Drexel University College of Medicine, 2001

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Interoperability endpoints

• FHIR API: https://fhir4.healow.com/fhir/r4/ABICBD/Endpoint/ABICBD

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Ashburn Allergy, PLLC

  • Allergy & Immunology Physician
  • Ashburn, VA
  • NPI 1174039770
  Medicare reassignment Authorized official

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1129075200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1768867200000",
    "number": "1548258783",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "20955 PROFESSIONAL PLZ STE 300",
            "city": "ASHBURN",
            "state": "VA",
            "postal_code": "201473405",
            "telephone_number": "571-246-6323",
            "fax_number": "888-823-5456"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "20955 PROFESSIONAL PLZ STE 300",
            "city": "ASHBURN",
            "state": "VA",
            "postal_code": "20147",
            "telephone_number": "571-246-6323",
            "fax_number": "888-823-5456"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "YOON",
        "first_name": "JIUN",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2005-10-12",
        "last_updated": "2026-01-20",
        "certification_date": "2026-01-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207K00000X",
            "taxonomy_group": "",
            "desc": "Allergy & Immunology",
            "state": "VA",
            "license": "0101246979",
            "primary": true
        },
        {
            "code": "207K00000X",
            "taxonomy_group": "",
            "desc": "Allergy & Immunology",
            "state": "DC",
            "license": "MD038548",
            "primary": false
        },
        {
            "code": "207K00000X",
            "taxonomy_group": "",
            "desc": "Allergy & Immunology",
            "state": "MD",
            "license": "D70246",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Samantha Ahreum Yi
• Matthew Yim, DACHM, LAC
• Ryan James Yingling
• Hiyab Goitom Yohannes, NP
• Hazel Yoon
• Nevin Malak Younan
• Mykeisha L Young, DPT
• Sura Younus
• Youreyedoctor P.C.
• Jayamole Zachariah

• Allergy & Immunology Physician in Ashburn, VA
• Providers in Ashburn, VA by specialty
• Allergy & Immunology Physician in Virginia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 20, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.