Active NPI
Justine Duyst, PSYD
- Clinical Psychologist
- Pasadena, CA
National Provider Identifier
1639961964
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Clinical Psychologist
- License
- PSY35549
- Practice address
- 416 Santa Paula Ave
Pasadena, CA 91107-2931 - Phone
- (559) 991-5750
- NPI assigned
- May 21, 2025
- Sex
- Female
- 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 |
|---|---|---|---|---|
| Clinical Psychologist | 103TC0700X | PSY35549 | CA | Primary |
Addresses
Primary practice location
416 Santa Paula Ave
Pasadena, CA 91107-2931
Mailing address
416 Santa Paula Ave
Pasadena, CA 91107-2931
Phone (559) 991-5750
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
- Opted out of Medicare
- Yes, effective Jan 1, 2025 through Jan 1, 2027
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| PSY35549 | CA | MD | Clinical Psychologist |
| 35549 | CA | MD | General Practice Dentistry |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1747785600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1747785600000",
"number": "1639961964",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "416 SANTA PAULA AVE",
"city": "PASADENA",
"state": "CA",
"postal_code": "911072931",
"telephone_number": "559-991-5750"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "416 SANTA PAULA AVE",
"city": "PASADENA",
"state": "CA",
"postal_code": "911072931",
"telephone_number": "559-991-5750"
}
],
"practiceLocations": [],
"basic": {
"last_name": "DUYST",
"first_name": "JUSTINE",
"credential": "PSYD",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2025-05-21",
"last_updated": "2025-05-21",
"certification_date": "2025-05-21",
"status": "A"
},
"taxonomies": [
{
"code": "103TC0700X",
"taxonomy_group": "",
"desc": "Psychologist, Clinical",
"state": "CA",
"license": "PSY35549",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Pasadena, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 21, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Opt Out Affidavits.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.