Gengwen Tian, MD. PH.D

Primary specialty

Pediatric Hematology & Oncology PhysicianTaxonomy code 2080P0207X

License

S9810 Issued in TX

Practice address

6621 Fannin St
Houston, TX 77030-2358

Phone

(832) 824-1000

NPI assigned

Jul 19, 2016

Last updated

Jul 20, 2026By the provider in NPPES

Sex

Female

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

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.

Specialty

Pediatric Medicine

Education

Other, 2011

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Philosophy

State licenses

Interoperability endpoints

• Direct secure messaging: gtian307055@prddirect.texaschildrens.org

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

{
    "created_epoch": "1468886400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1784505600000",
    "number": "1336592815",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "6621 FANNIN ST",
            "city": "HOUSTON",
            "state": "TX",
            "postal_code": "770302303"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "6621 FANNIN ST",
            "city": "HOUSTON",
            "state": "TX",
            "postal_code": "770302358",
            "telephone_number": "832-824-1000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "TIAN",
        "first_name": "GENGWEN",
        "credential": "MD. PH.D",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2016-07-19",
        "last_updated": "2026-07-20",
        "certification_date": "2026-07-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "TX",
            "license": "S9810",
            "primary": false
        },
        {
            "code": "2080P0207X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Pediatric Hematology-Oncology",
            "state": "TX",
            "license": "S9810",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Elizabeth A. Thyssen, D.O.
• Tiamat Enterprises (Caring Senior Service)
• Tiamat Enterprises, Inc. (Caring Senior Service of Houston)
• Tian Shan Acupuncture LLC
• Andrea Tian, MD
• Jihong Anita Tian, N.P.
• Miao Tian
• Christopher A Tiangco, AGPCNP-BC
• Amanda Marie Tibbels, PA
• Rita Fe G Tibbs, MD

• Pediatric Hematology & Oncology Physician in Houston, TX
• Providers in Houston, TX by specialty
• Pediatric Hematology & Oncology Physician in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 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.