Individual provider Active NPI

Westin Randall Tom

  • Pain Medicine (Anesthesiology) Physician
  • San Francisco, CA
National Provider Identifier
1992209134
Registry record updated Sep 4, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Pain Medicine (Anesthesiology) PhysicianTaxonomy code 207LP2900X
License
A166502 Issued in CA
Practice address
505 Parnassus Ave
San Francisco, CA 94143-2204
Phone
(415) 476-1000
NPI assigned
Mar 21, 2018
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 4, 2026

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Pain Medicine (Anesthesiology) Physician 207LP2900X A166502 CA Primary
Student in an Organized Health Care Education/Training Program 390200000X
Anesthesiology Physician 207L00000X A166502 CA

Addresses

Primary practice location

505 Parnassus Ave
San Francisco, CA 94143-2204

Mailing address

2255 Post St
San Francisco, CA 94115-3427

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
I20220711003665 CA Practitioner - Anesthesiology 1951781657 Reassigns benefits to 4 organizations

Care Compare profile

Medicare Care Compare
Specialty
Anesthesiology
Education
Duke University School of Medicine, 2018
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Alameda Health SystemGroup PAC ID 3779494521, 597 clinicians

Practice addresses (Care Compare)

1411 E 31St St
Oakland, CA 94602-1018
Phone (510) 437-4800

Hospital & facility affiliations

  • Highland Hospital Hospital, Oakland, CA, CCN 050320
  • Alameda Hospital Hospital, Alameda, CA, CCN 050211

Merit-based Incentive Payment System (MIPS)

Final score
95.17 of 100Reported as group
Quality
86.93
Promoting interoperability
100
Improvement activities
40
Cost
72.6

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
A166502CAMDPain Medicine (Anesthesiology) Physician

Practice roles

OrganizationSpecialtyStatusNew patients
UCSF Medical Group Business Services CurrentSince Jun 28, 2022 Accepting new patients
University of California San Francisco CurrentSince Jun 28, 2022 Accepting new patients
Alameda Health System Current Accepting new patients
Alameda Health System CurrentSince Aug 31, 2023 Accepting new patients
University Anesthesia Medical Group CurrentSince Jun 28, 2022 Accepting new patients
UCSF Medical Group Business Services CurrentSince Jun 28, 2022 Accepting new patients
University of California San Francisco Current Accepting new patients
University of California San Francisco CurrentSince Jun 28, 2022 Accepting new patients
Alameda Health System CurrentSince Aug 31, 2023 Accepting new patients
Alameda Health System Past Accepting new patients

Locations

2070 Clinton Ave
Alameda, CA 94501
Phone (510) 522-3700

1411 E 31st St
Oakland, CA 94602
Phone (510) 437-4323

505 Parnassus Ave
San Francisco, CA 94143
Phone (415) 476-9058

2330 Post St
San Francisco, CA 94115
Phone (415) 502-4444

2255 Post St
San Francisco, CA 94115
Phone (415) 885-7246

400 Parnassus Ave
#A632
San Francisco, CA 94143
Phone (415) 473-1000

13855 E 14th St
San Leandro, CA 94578
Phone (510) 357-6500

Organizations & group practices 10

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 4

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": "1521590400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1788480000000",
    "number": "1992209134",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2255 POST ST",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941153427"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "505 PARNASSUS AVE",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941432204",
            "telephone_number": "415-476-1000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "TOM",
        "first_name": "WESTIN",
        "middle_name": "RANDALL",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2018-03-21",
        "last_updated": "2026-09-04",
        "certification_date": "2026-09-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207LP2900X",
            "taxonomy_group": "",
            "desc": "Anesthesiology, Pain Medicine",
            "state": "CA",
            "license": "A166502",
            "primary": true
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "CA",
            "license": "A166502",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in San Francisco, CA

Sources for this page

Verify at the official NPI Registry.