Donald C Silcox, M.D.

Primary specialty

Rheumatology PhysicianTaxonomy code 207RR0500X

License

C35791 Issued in CA

Practice address

700 W Parr Ave
Suite a
Los Gatos, CA 95032-1442

Phone

(408) 356-3178

Fax

(408) 866-7926

NPI assigned

Aug 10, 2006

Last updated

Oct 11, 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)

Enrolled

Credentials

Doctor of Medicine

State licenses

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Osteoporosis Center of Los Gatos

  • Bone Densitometry Radiologic Technologist
  • Los Gatos, CA
  • NPI 1649281551
  Authorized official Same address or phone

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

{
    "created_epoch": "1155168000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1791676800000",
    "number": "1285645150",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "700 W PARR AVE",
            "address_2": "SUITE A",
            "city": "LOS GATOS",
            "state": "CA",
            "postal_code": "950321442",
            "telephone_number": "408-356-3178",
            "fax_number": "408-866-7926"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "700 W PARR AVE",
            "address_2": "SUITE A",
            "city": "LOS GATOS",
            "state": "CA",
            "postal_code": "950321442",
            "telephone_number": "408-356-3178",
            "fax_number": "408-866-7926"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SILCOX",
        "first_name": "DONALD",
        "middle_name": "C",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-08-10",
        "last_updated": "2026-10-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RR0500X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Rheumatology",
            "state": "CA",
            "license": "C35791",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Rheumatology Physician in Los Gatos, CA
• Providers in Los Gatos, CA by specialty
• Rheumatology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 11, 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.