Thomas S.Lam MD. a Professional Corporation

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

A44280 Issued in CA

Legal business name

THOMAS S.LAM MD. A PROFESSIONAL CORPORATION

Practice address

333 S Garfield Ave Ste a
Alhambra, CA 91801-3895

Phone

(626) 284-1997

NPI assigned

Jun 12, 2008

Organization subpart

No

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

Authorized official

Name

Dr. Thomas S. Lam, M.D.

Title

Director

Phone

(626) 943-6274

Specialties & licenses 1

Addresses

Locations

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

{
    "created_epoch": "1213228800000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1750118400000",
    "number": "1336309350",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 7589",
            "city": "ALHAMBRA",
            "state": "CA",
            "postal_code": "918027589",
            "telephone_number": "626-284-1997",
            "fax_number": "626-284-2549"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "333 S GARFIELD AVE STE A",
            "city": "ALHAMBRA",
            "state": "CA",
            "postal_code": "918013895",
            "telephone_number": "626-284-1997"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "THOMAS S.LAM MD. A PROFESSIONAL CORPORATION",
        "organizational_subpart": "NO",
        "enumeration_date": "2008-06-12",
        "last_updated": "2025-06-17",
        "certification_date": "2025-06-17",
        "status": "A",
        "authorized_official_last_name": "LAM",
        "authorized_official_first_name": "THOMAS",
        "authorized_official_middle_name": "S.",
        "authorized_official_title_or_position": "DIRECTOR",
        "authorized_official_telephone_number": "626-943-6274",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "M.D."
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "CA",
            "license": "A44280",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Gastroenterology Physician in Alhambra, CA
• Providers in Alhambra, CA by specialty
• Gastroenterology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 17, 2025; 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.