Individual provider Active NPI

Ji Won Yoon, DDS

  • Endodontics
  • Mill Creek, WA
National Provider Identifier
1275228678
Registry record updated Sep 4, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
EndodonticsTaxonomy code 1223E0200X
License
70131335 Issued in WA
Practice address
15808 Mill Creek Blvd
Mill Creek, WA 98012-1500
Phone
(425) 318-4787
NPI assigned
Apr 11, 2023
Sex
Female
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Sep 4, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
EndodonticsGroup: 193400000X SINGLE SPECIALTY GROUP 1223E0200X 70131335 WA Primary

Addresses

Primary practice location

15808 Mill Creek Blvd
Mill Creek, WA 98012-1500

Mailing address

109 Grasslands LN
Redwood City, CA 94065-7430
Phone (760) 212-9171

Other names 1

  • Dr. Christine Yoon Professional name

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled

NPI Registry JSON

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

{
    "created_epoch": "1681171200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1788480000000",
    "number": "1275228678",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "109 GRASSLANDS LN",
            "city": "REDWOOD CITY",
            "state": "CA",
            "postal_code": "940657430",
            "telephone_number": "760-212-9171"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "15808 MILL CREEK BLVD",
            "city": "MILL CREEK",
            "state": "WA",
            "postal_code": "980121500",
            "telephone_number": "425-318-4787"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "YOON",
        "first_name": "JI WON",
        "name_prefix": "Miss",
        "credential": "DDS",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2023-04-11",
        "last_updated": "2026-09-04",
        "certification_date": "2026-09-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1223E0200X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Dentist, Endodontics",
            "state": "WA",
            "license": "70131335",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "CHRISTINE",
            "last_name": "YOON",
            "prefix": "DR.",
            "credential": "DDS",
            "code": "2",
            "type": "Professional Name"
        }
    ]
}

Other providers in Mill Creek, WA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 4, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.