NPIMap

Individual provider Active NPI

William Robert Corn, MD

  • Neurological Surgery Physician
  • San Francisco, CA
National Provider Identifier
1962457903
Registry record updated Jul 13, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Neurological Surgery PhysicianTaxonomy code 207T00000X
License
G68193 Issued in CA
Practice address
1001 Potrero Ave
RM 4M62
San Francisco, CA 94110-3518
Phone
(415) 206-4353
Fax
(415) 476-5582
NPI assigned
May 24, 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
Neurological Surgery Physician 207T00000X G68193 CA Primary
Neurology Physician 2084N0400X G68193 CA

Addresses

Primary practice location

1001 Potrero Ave
RM 4M62
San Francisco, CA 94110-3518

Mailing address

PO Box 7464
San Francisco, CA 94120-7464
Phone (415) 206-3103

Other identifiers 1

IdentifierTypeStateIssuer
00G681930MedicaidCA

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CA
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20080806000539 CA Practitioner - Neurology 4183798382 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Neurology
Education
Eastern Virginia Medical School, 1988
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
City and County of San FranciscoGroup PAC ID 1658280748, 368 clinicians

Practice addresses (Care Compare)

1001 Potrero Ave
San Francisco, CA 94110-3518
Phone (415) 206-2305

1001 Potrero Ave BLDG 80 Ward 83
Suite 32
San Francisco, CA 94110-3518
Phone (628) 206-8610

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
88.2 of 100Reported as group
Quality
61.12
Promoting interoperability
99
Improvement activities
40
Cost
83.72

Merit-based Incentive Payment System (MIPS)

Final score
97.28 of 100Reported as group
Quality
89.92
Promoting interoperability
100
Improvement activities
40
Cost
78.23

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
G68193CAMDNeurological Surgery Physician

Practice roles

OrganizationSpecialtyStatusNew patients
City and County of San Francisco CurrentSince Oct 20, 2019 Accepting new patients
University of California SFGH Medical Group Current Accepting new patients
City & County of San Francisco Current Accepting new patients
University of California SFGH Medical Group CurrentSince Jun 13, 2008 Accepting new patients
University of California SFGH Medical Group Neurology CurrentSince Jun 13, 2008 Accepting new patients
City & County of San Francisco CurrentSince Oct 20, 2019 Accepting new patients

Locations

1001 Potrero Ave
Bldg 5
San Francisco, CA 94110
Phone (628) 206-5753

1001 Potrero Ave
Bldg 1
San Francisco, CA 94110
Phone (628) 206-6182

375 Laguna Honda Blvd
San Francisco, CA 94116
Phone (415) 759-2300

1001 Potrero Ave
Rm 4M62
San Francisco, CA 94110
Phone (415) 206-3208

1001 Potrero Ave
San Francisco, CA 94110
Phone (415) 206-2305

Organizations & group practices 6

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.

Hospital & facility affiliations 3

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

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

{
    "created_epoch": "1148428800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1962457903",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 7464",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941207464",
            "telephone_number": "415-206-3103",
            "fax_number": "415-206-3872"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1001 POTRERO AVE",
            "address_2": "RM 4M62",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941103518",
            "telephone_number": "415-206-4353",
            "fax_number": "415-476-5582"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CORN",
        "first_name": "WILLIAM",
        "middle_name": "ROBERT",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-24",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207T00000X",
            "taxonomy_group": "",
            "desc": "Neurological Surgery",
            "state": "CA",
            "license": "G68193",
            "primary": true
        },
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "CA",
            "license": "G68193",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00G681930",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in San Francisco, CA

Sources for this page

Verify at the official NPI Registry.