Individual provider Active NPI

William Thomas Halsey, MD

  • Anesthesiology Physician
  • San Francisco, CA
National Provider Identifier
1295775237
Registry record updated Jul 11, 2007
On this page

Key facts

NPPES NPI Registry
Primary specialty
Anesthesiology PhysicianTaxonomy code 207L00000X
License
C37471 Issued in CA
Practice address
3700 California St
San Francisco, CA 94118-1618
Phone
(415) 719-0000
NPI assigned
Jun 7, 2006
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 11, 2007

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Anesthesiology Physician 207L00000X C37471 CA Primary
Pain Medicine (Anesthesiology) Physician 207LP2900X C37471 CA

Addresses

Primary practice location

3700 California St
San Francisco, CA 94118-1618

Mailing address

PO Box 39000
Dept 33995
San Francisco, CA 94139-0001
Phone (503) 372-2740

Other identifiers 1

IdentifierTypeStateIssuer
00C374710MedicaidCA

Medicare participation

Medicare enrollment files
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

Enrollment IDStateProvider typePAC IDDetails
I20081029000881 CA Practitioner - Anesthesiology 6305905704 Reassigns benefits to 2 organizations

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
37471CAMDPharmacist
C37471CAMDPain Medicine (Anesthesiology) Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Anesthesia Care Associates Medical Group Inc Anesthesiology CurrentSince Jan 1, 2020 Accepting new patients
Brookwood Anesthesia Inc Anesthesiology CurrentSince Oct 22, 2023 Accepting new patients

Locations

1501 Trousdale Dr
Burlingame, CA 94010
Phone (650) 696-3520

3000 California St
#2
San Francisco, CA 94115
Phone (415) 561-1171

77 Van Ness Ave
Apt 301
San Francisco, CA 94102
Phone (415) 821-8015

3555 Cesar Chavez
San Francisco, CA 94110
Phone (415) 485-8824

55 Francisco St
Ste 500
San Francisco, CA 94133
Phone (415) 834-3000

1635 Divisadero St
Ste 200
San Francisco, CA 94115
Phone (415) 346-1218

2333 Buchanan St
San Francisco, CA 94115
Phone (415) 563-4321

76 Brookwood Ave
Ste B
Santa Rosa, CA 95404
Phone (707) 523-2381

76 Brookwood Ave
Santa Rosa, CA 95404
Phone (707) 523-2381

Organizations & group practices 2

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.

NPI Registry JSON

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

{
    "created_epoch": "1149638400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1184112000000",
    "number": "1295775237",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 39000",
            "address_2": "DEPT 33995",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941390001",
            "telephone_number": "503-372-2740",
            "fax_number": "503-372-2754"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3700 CALIFORNIA ST",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941181618",
            "telephone_number": "415-719-0000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HALSEY",
        "first_name": "WILLIAM",
        "middle_name": "THOMAS",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-06-07",
        "last_updated": "2007-07-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "CA",
            "license": "C37471",
            "primary": true
        },
        {
            "code": "207LP2900X",
            "taxonomy_group": "",
            "desc": "Anesthesiology, Pain Medicine",
            "state": "CA",
            "license": "C37471",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00C374710",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in San Francisco, CA

Sources for this page

Verify at the official NPI Registry.