Individual provider Active NPI

Dexter Tzulun Mai, LCSW

  • Clinical Social Worker
  • San Francisco, CA
National Provider Identifier
1932660834
Registry record updated Jun 15, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Clinical Social WorkerTaxonomy code 1041C0700X
License
134200 Issued in CA
Practice address
1559B Sloat Blvd Ste 254
San Francisco, CA 94132-1222
Phone
(415) 320-6138
NPI assigned
Mar 26, 2019
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jun 15, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Clinical Social Worker 1041C0700X 134200 CA Primary

Addresses

Primary practice location

1559B Sloat Blvd Ste 254
San Francisco, CA 94132-1222

Mailing address

1559B Sloat Blvd Ste 254
San Francisco, CA 94132-1222

Other practice location 1

647 Veterans Blvd Ste A
Redwood City, CA 94063-1441
Phone (415) 320-6138

Other names 1

  • Tzu Lun Mai Other name

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)
Not enrolled

State licenses

LicenseStateTypeSpecialty
115870CAMDMarriage & Family Therapist

Practice roles

OrganizationSpecialtyStatusNew patients
Video Game Child and Family Counseling Inc. CurrentSince Jun 18, 2023 Accepting new patients
Dexter Mai, Licensed Clinical Social Worker Clinical Current Accepting new patients
Progress Foundation PastSince Oct 1, 2022 Accepting new patients
Progress Foundation PastSince Oct 1, 2022 Accepting new patients
Asian Health Services PastSince Jul 1, 2021 Accepting new patients

Locations

647 Veterans Blvd
Ste A
Redwood City, CA 94063
Phone (650) 336-0054

1559B Sloat Blvd
San Francisco, CA 94132
Phone (415) 290-6004

121 W Washington Ave
Ste 204
Sunnyvale, CA 94086
Phone (310) 962-1995

Organizations & group practices 5

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": "1553558400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1781481600000",
    "number": "1932660834",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1559B SLOAT BLVD STE 254",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941321222"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1559B SLOAT BLVD STE 254",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941321222",
            "telephone_number": "415-320-6138"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "647 Veterans Blvd Ste A",
            "address_purpose": "LOCATION",
            "city": "Redwood City",
            "state": "CA",
            "postal_code": "940631441",
            "country_code": "US",
            "telephone_number": "415-320-6138",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MAI",
        "first_name": "DEXTER",
        "middle_name": "TZULUN",
        "credential": "LCSW",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-03-26",
        "last_updated": "2026-06-15",
        "certification_date": "2026-06-15",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": "CA",
            "license": "134200",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "TZU",
            "last_name": "MAI",
            "middle_name": "LUN",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

Other providers in San Francisco, CA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 15, 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.