Active NPI
Robert J. Tomaszewski
- Clinical Psychologist
- Chatsworth, CA
National Provider Identifier
1407951965
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Clinical Psychologist
- License
- PSY7837
- Practice address
- 21053 Devonshire St
Suite 101
Chatsworth, CA 91311-2364 - Phone
- (818) 886-7222
- Fax
- (818) 886-7223
- NPI assigned
- Sep 13, 2006
- 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 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Clinical Neuropsychologist | 103G00000X | PSY7837 | CA | |
| Clinical Psychologist | 103TC0700X | PSY7837 | CA | Primary |
Addresses
Primary practice location
21053 Devonshire St
Suite 101
Chatsworth, CA 91311-2364
Mailing address
21053 Devonshire St
Suite 101
Chatsworth, CA 91311-2364
Phone (818) 886-7222
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 Psychologist
- Education
- Other, 1981
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
Practice addresses (Care Compare)
21053 Devonshire St
Chatsworth, CA 91311-8243
Phone (818) 886-7222
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Philosophy
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| UC Regents | Clinical | Current | Accepting new patients |
Locations
300 Medical Plz
Los Angeles, CA 90095
Phone (310) 206-8438
File 2939
Los Angeles, CA 90074
Phone (310) 794-6596
Organizations & group practices 1
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1158105600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1757548800000",
"number": "1407951965",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "21053 DEVONSHIRE ST",
"address_2": "SUITE 101",
"city": "CHATSWORTH",
"state": "CA",
"postal_code": "913112364",
"telephone_number": "818-886-7222",
"fax_number": "818-886-7223"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "21053 DEVONSHIRE ST",
"address_2": "SUITE 101",
"city": "CHATSWORTH",
"state": "CA",
"postal_code": "913112364",
"telephone_number": "818-886-7222",
"fax_number": "818-886-7223"
}
],
"practiceLocations": [],
"basic": {
"last_name": "TOMASZEWSKI",
"first_name": "ROBERT",
"middle_name": "J.",
"name_prefix": "Dr.",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2006-09-13",
"last_updated": "2025-09-11",
"status": "A"
},
"taxonomies": [
{
"code": "103G00000X",
"taxonomy_group": "",
"desc": "Clinical Neuropsychologist",
"state": "CA",
"license": "PSY7837",
"primary": false
},
{
"code": "103TC0700X",
"taxonomy_group": "",
"desc": "Psychologist, Clinical",
"state": "CA",
"license": "PSY7837",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}
Other providers in Chatsworth, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; 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.