Active NPI
Elena del Rosario Ortiz Almaguer
- Social Worker
- San Mateo, CA
National Provider Identifier
1457764151
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Social Worker
- License
- 105936
- Practice address
- 650 N Delaware St
San Mateo, CA 94401-1732 - Phone
- (650) 558-2380
- NPI assigned
- Jun 10, 2014
- Sex
- Female
- 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 |
|---|---|---|---|---|
| Social Worker | 104100000X | 105936 | CA | Primary |
Addresses
Primary practice location
650 N Delaware St
San Mateo, CA 94401-1732
Mailing address
650 N Delaware St
San Mateo, CA 94401-1732
Phone (650) 558-2380
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
| License | State | Type | Specialty |
|---|---|---|---|
| 105936 | CA | MD | Public Health Dentist |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1402358400000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1764547200000",
"number": "1457764151",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "650 N DELAWARE ST",
"city": "SAN MATEO",
"state": "CA",
"postal_code": "944011732",
"telephone_number": "650-558-2380"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "650 N DELAWARE ST",
"city": "SAN MATEO",
"state": "CA",
"postal_code": "944011732",
"telephone_number": "650-558-2380"
}
],
"practiceLocations": [],
"basic": {
"last_name": "ORTIZ ALMAGUER",
"first_name": "ELENA DEL ROSARIO",
"sole_proprietor": "YES",
"sex": "F",
"enumeration_date": "2014-06-10",
"last_updated": "2025-12-01",
"certification_date": "2025-12-01",
"status": "A"
},
"taxonomies": [
{
"code": "104100000X",
"taxonomy_group": "",
"desc": "Social Worker",
"state": "CA",
"license": "105936",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in San Mateo, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 1, 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.