Individual provider Active NPI

Robert Leo Owen, M.D.

  • Gastroenterology Physician
  • San Francisco, CA
National Provider Identifier
1639111628
Registry record updated Jul 13, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Gastroenterology PhysicianTaxonomy code 207RG0100X
License
G15034 Issued in CA
Practice address
4150 Clement St
VA Medical Center 11C1
San Francisco, CA 94121-1545
Phone
(415) 750-2101
Fax
(415) 750-2249
NPI assigned
Jun 12, 2006
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 13, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Gastroenterology Physician 207RG0100X G15034 CA Primary
Gastroenterology Physician 207RG0100X 2759R LA

Addresses

Primary practice location

4150 Clement St
VA Medical Center 11C1
San Francisco, CA 94121-1545

Mailing address

4150 Clement St
VA Medical Center 11C1
San Francisco, CA 94121-1545
Phone (415) 750-2101

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
2759RLAMDGastroenterology Physician

NPI Registry JSON

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

{
    "created_epoch": "1150070400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1639111628",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4150 CLEMENT ST",
            "address_2": "VA MEDICAL CENTER 11C1",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941211545",
            "telephone_number": "415-750-2101",
            "fax_number": "415-750-2249"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4150 CLEMENT ST",
            "address_2": "VA MEDICAL CENTER 11C1",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941211545",
            "telephone_number": "415-750-2101",
            "fax_number": "415-750-2249"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "OWEN",
        "first_name": "ROBERT",
        "middle_name": "LEO",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-06-12",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "CA",
            "license": "G15034",
            "primary": true
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "LA",
            "license": "2759R",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in San Francisco, CA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.