James Ralph Jacobs, M.D., PH.D.

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

127979 Issued in CA

Practice address

866 Campus Dr Ste 226
Stanford, CA 94305-8508

Phone

(650) 621-0851

Fax

(650) 723-4999

NPI assigned

Mar 3, 2009

Sex

Male

Sole proprietor

No

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

Specialties & licenses 4

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine, Doctor of Philosophy

State licenses

Practice roles

Locations

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

• CG Medical Associates Inc

  • Urgent Care Clinic/Center
  • Cincinnati, OH
  • NPI 1982903951
  NPD
• Doctors Urgent Care Offices Medical Group Inc

  • Urgent Care Clinic/Center
  • Erlanger, KY
  • NPI 1447294277
  NPD (past)
• Mid-Atlantic Emergency Medical Associates, PLLC

  • Emergency Medicine Physician
  • Charlotte, NC
  • NPI 1073562757
  NPD (past)

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

{
    "created_epoch": "1236038400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1748822400000",
    "number": "1346480308",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "866 CAMPUS DR STE 226",
            "city": "STANFORD",
            "state": "CA",
            "postal_code": "943058508",
            "telephone_number": "650-621-0851",
            "fax_number": "650-723-4999"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "866 CAMPUS DR STE 226",
            "city": "STANFORD",
            "state": "CA",
            "postal_code": "943058508",
            "telephone_number": "650-621-0851",
            "fax_number": "650-723-4999"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "JACOBS",
        "first_name": "JAMES",
        "middle_name": "RALPH",
        "name_prefix": "Dr.",
        "credential": "M.D., PH.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2009-03-03",
        "last_updated": "2025-06-02",
        "certification_date": "2025-06-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "OH",
            "license": "094686",
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "NC",
            "license": "96-01157",
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "NY",
            "license": "230097",
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "CA",
            "license": "127979",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Fabio Massaiti Iwamoto, MD
• Debra H Iwasaki, PT ATC CSCS
• Robert Keith Jackler, MD
• Ethan C Jackson, MD
• Benjamin Richard Jacob, MD
• Eva Astrid Jacobsen, M.D.
• Karen Blake Jacobson, MD
• Mary Jacobson
• Chelsie Line Jacques, MD
• Louisa Victoria Jacquez, LMFT

• Emergency Medicine Physician in Stanford, CA
• Providers in Stanford, CA by specialty
• Emergency Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 2, 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.