John Putnam Siegel, MD

Primary specialty

Surgical Critical Care PhysicianTaxonomy code 2086S0102X

License

G56645 Issued in CA

Practice address

751 S Bascom Ave
General Surgery Department
San Jose, CA 95128-2604

Phone

(408) 885-5000

NPI assigned

Jun 21, 2006

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

Other identifiers 1

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Interoperability endpoints

• Direct secure messaging: jsiegel11494@santaclaravalley.direct-ci.net

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

{
    "created_epoch": "1150848000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1376589150",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1541 UNIVERSITY AVE",
            "city": "SAN JOSE",
            "state": "CA",
            "postal_code": "95126",
            "telephone_number": "408-246-7767"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "751 S BASCOM AVE",
            "address_2": "GENERAL SURGERY DEPARTMENT",
            "city": "SAN JOSE",
            "state": "CA",
            "postal_code": "951282604",
            "telephone_number": "408-885-5000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SIEGEL",
        "first_name": "JOHN",
        "middle_name": "PUTNAM",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-06-21",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208600000X",
            "taxonomy_group": "",
            "desc": "Surgery",
            "state": "CA",
            "license": "G566450",
            "primary": false
        },
        {
            "code": "2086S0102X",
            "taxonomy_group": "",
            "desc": "Surgery, Surgical Critical Care",
            "state": "CA",
            "license": "G56645",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00G566450",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Kirin Sidhu, PMHNP-BC
• Seema Sidhu, MD
• Allan Charles Sidle, M.D.
• Veronika Sidor
• Thao Nguyen Sieben, SLP
• Greta Siegrist
• William Pouate Sieh
• Madison Gray Siemers, BA, FEMINIST STUDIES
• Dashalena Sieng
• Brandi Sierra

• Surgical Critical Care Physician in San Jose, CA
• Providers in San Jose, CA by specialty
• Surgical Critical Care Physician in California

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