Romulo De Castro Santos Jr.

Primary specialty

Hematology & Oncology PhysicianTaxonomy code 207RH0003X

License

95422701 Issued in CA

Practice address

7800 El Camino Real Apt 1125
Colma, CA 94014-3178

Phone

(415) 850-2536

NPI assigned

Aug 28, 2026

Last updated

Aug 28, 2026By the provider in NPPES

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

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": "1787875200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787875200000",
    "number": "1376451872",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "7800 EL CAMINO REAL APT 1125",
            "city": "COLMA",
            "state": "CA",
            "postal_code": "940143178"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "7800 EL CAMINO REAL APT 1125",
            "city": "COLMA",
            "state": "CA",
            "postal_code": "940143178",
            "telephone_number": "415-850-2536"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SANTOS",
        "first_name": "ROMULO",
        "middle_name": "DE CASTRO",
        "name_prefix": "Mr.",
        "name_suffix": "Jr.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2026-08-28",
        "last_updated": "2026-08-28",
        "certification_date": "2026-08-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "CA",
            "license": "95422701",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Maureen Judith Oconnor, CCC-SLP
• Patrick Matthew Phillips
• Blite Khirsteen Lazaro Pulido
• Jasmine Marie Ramirez
• Anne Marie Randolph
• Ryan Sue, PHARMD
• Patricia B. Tang, O.D.
• Scott Tanner
• Nellie Tom
• Suzette M. Villanueva, DENTIST

• Hematology & Oncology Physician in Colma, CA
• Providers in Colma, CA by specialty
• Hematology & Oncology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 28, 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.