Active NPI
Jaeseung Sin
- Case Manager/Care Coordinator
- San Leandro, CA
National Provider Identifier
1639046535
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Case Manager/Care Coordinator
- Practice address
- 101 Callan Ave Ste 400
San Leandro, CA 94577-4523 - Phone
- (844) 828-2254
- Fax
- (510) 547-3258
- NPI assigned
- Oct 23, 2025
- Sex
- Male
- Sole proprietor
- Yes
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 |
|---|---|---|---|---|
| Case Manager/Care Coordinator | 171M00000X | CA | Primary |
Addresses
Primary practice location
101 Callan Ave Ste 400
San Leandro, CA 94577-4523
Mailing address
101 Callan Ave Ste 400
San Leandro, CA 94577-4523
Phone (844) 828-2254
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": "1761177600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1761177600000",
"number": "1639046535",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "101 CALLAN AVE STE 400",
"city": "SAN LEANDRO",
"state": "CA",
"postal_code": "945774523",
"telephone_number": "844-828-2254",
"fax_number": "510-547-3258"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "101 CALLAN AVE STE 400",
"city": "SAN LEANDRO",
"state": "CA",
"postal_code": "945774523",
"telephone_number": "844-828-2254",
"fax_number": "510-547-3258"
}
],
"practiceLocations": [],
"basic": {
"last_name": "SIN",
"first_name": "JAESEUNG",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2025-10-23",
"last_updated": "2025-10-23",
"certification_date": "2025-10-23",
"status": "A"
},
"taxonomies": [
{
"code": "171M00000X",
"taxonomy_group": "",
"desc": "Case Manager/Care Coordinator",
"state": "CA",
"license": null,
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in San Leandro, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 23, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.