Individual provider Active NPI

Thomas Paul Tarshis, MD

  • Psychiatry Physician
  • Berkeley, CA
National Provider Identifier
1043304017
Registry record updated Jan 16, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Psychiatry PhysicianTaxonomy code 2084P0800X
License
A81257 Issued in CA
Practice address
3030 Ashby Ave Ste 104
Berkeley, CA 94705-2439
Phone
(510) 224-4221
Fax
(510) 422-1442
NPI assigned
Oct 3, 2006
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jan 16, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Psychiatry Physician 2084P0800X A81257 CA Primary

Addresses

Primary practice location

3030 Ashby Ave Ste 104
Berkeley, CA 94705-2439

Mailing address

3030 Ashby Ave Ste 104
Berkeley, CA 94705-2439
Phone (510) 224-4221

Other identifiers 1

IdentifierTypeStateIssuer
00A812570MedicaidCA

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
A81257CAMDPsychiatry Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Magellan Health Services of Arizona, Inc Past Accepting new patients
Vo of Arizona, Inc. Past Accepting new patients
Bay Children'S Services Psychiatry PastSince May 7, 2024 Accepting new patients

Organizations & group practices 3

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": "1159833600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1768521600000",
    "number": "1043304017",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3030 ASHBY AVE STE 104",
            "city": "BERKELEY",
            "state": "CA",
            "postal_code": "947052439",
            "telephone_number": "510-224-4221",
            "fax_number": "510-422-1442"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3030 ASHBY AVE STE 104",
            "city": "BERKELEY",
            "state": "CA",
            "postal_code": "947052439",
            "telephone_number": "510-224-4221",
            "fax_number": "510-422-1442"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "TARSHIS",
        "first_name": "THOMAS",
        "middle_name": "PAUL",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-10-03",
        "last_updated": "2026-01-16",
        "certification_date": "2026-01-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "CA",
            "license": "A81257",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00A812570",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Berkeley, CA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 16, 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.