Active NPI
Zachary Kalkanis
- Social Worker
- Oakland, CA
National Provider Identifier
1285560029
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Social Worker
- License
- ASW135539
- Practice address
- 401 Grand Ave
Oakland, CA 94610-5054 - Phone
- (415) 474-7310
- Fax
- (510) 257-1821
- NPI assigned
- Jun 19, 2026
- Sex
- Male
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Social Worker | 104100000X | ASW135539 | CA | Primary |
Addresses
Primary practice location
401 Grand Ave
Oakland, CA 94610-5054
Mailing address
PO Box 64204
Los Angeles, CA 90064-0204
Phone (510) 640-4001
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
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1781827200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1781827200000",
"number": "1285560029",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "PO BOX 64204",
"city": "LOS ANGELES",
"state": "CA",
"postal_code": "900640204",
"telephone_number": "510-640-4001"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "401 GRAND AVE",
"city": "OAKLAND",
"state": "CA",
"postal_code": "946105054",
"telephone_number": "415-474-7310",
"fax_number": "510-257-1821"
}
],
"practiceLocations": [],
"basic": {
"last_name": "KALKANIS",
"first_name": "ZACHARY",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2026-06-19",
"last_updated": "2026-06-19",
"certification_date": "2026-06-19",
"status": "A"
},
"taxonomies": [
{
"code": "104100000X",
"taxonomy_group": "",
"desc": "Social Worker",
"state": "CA",
"license": "ASW135539",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Oakland, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 19, 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.