Kenneth J Hammerman, MD

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

G25963 Issued in CA

Practice address

1199 Bush Street
Suite #500
San Francisco, CA 94109

Phone

(415) 673-7600

Fax

(415) 673-8065

NPI assigned

Nov 1, 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 3

Medicare fee-for-service enrollment

Enrolled in CA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

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

{
    "created_epoch": "1162339200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1174600365",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1199 BUSH STREET",
            "address_2": "SUITE #500",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "94109",
            "telephone_number": "415-673-7600",
            "fax_number": "415-673-8065"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1199 BUSH STREET",
            "address_2": "SUITE #500",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "94109",
            "telephone_number": "415-673-7600",
            "fax_number": "415-673-8065"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HAMMERMAN",
        "first_name": "KENNETH",
        "middle_name": "J",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-11-01",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "G25963",
            "primary": false
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "CA",
            "license": "G25963",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "MEDICARE RR",
            "identifier": "10W02904",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "MEDICARE RR",
            "identifier": "CY0128",
            "state": null
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00G259630",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Lashall Hamlin
• Eric Hamm, MSW, LCSW
• Victoria Lynn Hamman, N.D.
• Hali Hammer, MD
• Zoe Hammer, RN
• Seth Brian Hammerman, MD
• Barbara Hammes
• Christopher Hammett
• Julia Hammett, LMFT
• Hammock Health Incorporated

• Gastroenterology Physician in San Francisco, CA
• Providers in San Francisco, CA by specialty
• Gastroenterology 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.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.