Harold Nathan Tan, MD

Primary specialty

Medical Oncology PhysicianTaxonomy code 207RX0202X

License

49042 Issued in TX

Practice address

1515 Holcombe Blvd
Houston, TX 77030-4000

Phone

(713) 792-6161

NPI assigned

Nov 7, 2025

Sex

Male

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

Medicare enrollment (NPD)

Not enrolled

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

{
    "created_epoch": "1762473600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1788220800000",
    "number": "1013887728",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 4439",
            "city": "HOUSTON",
            "state": "TX",
            "postal_code": "772104439",
            "telephone_number": "713-792-2991",
            "fax_number": "713-745-1782"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1515 HOLCOMBE BLVD",
            "city": "HOUSTON",
            "state": "TX",
            "postal_code": "770304000",
            "telephone_number": "713-792-6161"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "TAN",
        "first_name": "HAROLD NATHAN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2025-11-07",
        "last_updated": "2026-09-01",
        "certification_date": "2026-09-01",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RX0202X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Medical Oncology",
            "state": "TX",
            "license": "49042",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "TX",
            "license": "49042",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Faye Tan, MD
• Filemon K Tan, M.D.
• Gabriel Tan, PH.D
• Gail Christine Tan, MD
• Grace Bee-Tin Tan, MD
• Jenna Tan
• Jens A Tan, MD
• Jiayin Tan, DDS, MS
• Kim Patricia Tan, AGACNP-BC
• Laura Pekying Tan, RD

• Medical Oncology Physician in Houston, TX
• Providers in Houston, TX by specialty
• Medical Oncology Physician in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 1, 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.