Active NPI
Aja Wei Loo
- Clinical Social Worker
- Irvine, CA
National Provider Identifier
1871123323
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Clinical Social Worker
- License
- 138322
- Practice address
- 18012 Cowan
Irvine, CA 92614-6800 - Phone
- (714) 989-6019
- NPI assigned
- Jan 23, 2020
- Last updated
- Jun 23, 2026
- 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 |
|---|---|---|---|---|
| Clinical Social Worker | 1041C0700X | 138322 | CA | Primary |
Addresses
Primary practice location
18012 Cowan
Irvine, CA 92614-6800
Mailing address
18012 Cowan
Irvine, CA 92614-6800
Phone (209) 614-5409
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in CA
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: No
- Power mobility devices: No
- Hospice: No
Enrollment records 1
Care Compare profile
Medicare Care Compare- Specialty
- Clinical Social Worker
- Education
- Other, 2022
- Medicare assignment
- May accept Medicare assignment
Practice addresses (Care Compare)
3301 Michelson Dr
Apt 3313
Irvine, CA 92612-4300
3301 Michelson Dr Apt
Suite 3313
Irvine, CA 92612-4321
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Western Youth Services | Past | Accepting new patients | |
| New Alternatives Inc. | Past | 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, National Provider Directory roles and organizations whose NPPES authorized official is this provider.
-
- Case Management Agency
- Fountain Valley, CA
- NPI 1174989735
-
- Community/Behavioral Health Agency
- Fountain Valley, CA
- NPI 1215484019
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1579737600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1782172800000",
"number": "1871123323",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "18012 COWAN",
"city": "IRVINE",
"state": "CA",
"postal_code": "926146800",
"telephone_number": "209-614-5409"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "18012 COWAN",
"city": "IRVINE",
"state": "CA",
"postal_code": "926146800",
"telephone_number": "714-989-6019"
}
],
"practiceLocations": [],
"basic": {
"last_name": "LOO",
"first_name": "AJA",
"middle_name": "WEI",
"sole_proprietor": "YES",
"sex": "F",
"enumeration_date": "2020-01-23",
"last_updated": "2026-06-23",
"certification_date": "2026-06-23",
"status": "A"
},
"taxonomies": [
{
"code": "1041C0700X",
"taxonomy_group": "",
"desc": "Social Worker, Clinical",
"state": "CA",
"license": "138322",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Irvine, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 23, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.