Thien Long, LLC

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

D0063163 Issued in MD

Legal business name

THIEN LONG, LLC

Practice address

4 Professional Dr Ste 133
Gaithersburg, MD 20879-3426

Phone

(301) 974-9625

NPI assigned

Aug 2, 2011

Organization subpart

No

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

Authorized official

Name

Stephen NguyenNPI 1265596050

Title

Physician

Phone

(301) 569-6176

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in DC

Enrollment records 1

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• Stephen T. Nguyen, M.D.

  • Internal Medicine Physician
  • Gaithersburg, MD
  • NPI 1265596050

  DC

  Medicare reassignment Authorized official

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

{
    "created_epoch": "1312243200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1755129600000",
    "number": "1174801609",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4 PROFESSIONAL DR",
            "address_2": "SUITE 133",
            "city": "GAITHERSBURG",
            "state": "MD",
            "postal_code": "208793407",
            "telephone_number": "301-974-9625"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4 PROFESSIONAL DR STE 133",
            "city": "GAITHERSBURG",
            "state": "MD",
            "postal_code": "208793426",
            "telephone_number": "301-974-9625"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "THIEN LONG, LLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2011-08-02",
        "last_updated": "2025-08-14",
        "certification_date": "2025-08-14",
        "status": "A",
        "authorized_official_last_name": "NGUYEN",
        "authorized_official_first_name": "STEPHEN",
        "authorized_official_title_or_position": "PHYSICIAN",
        "authorized_official_telephone_number": "301-569-6176"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Internal Medicine",
            "state": "MD",
            "license": "D0063163",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Internal Medicine Physician in Gaithersburg, MD
• Providers in Gaithersburg, MD by specialty
• Internal Medicine Physician in Maryland

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 14, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.