Joseph Lantz, PSY.D.
Joseph Lantz, PSY.D. is a Forensic Psychologist in Whittier, CA, registered under NPI 1154401479. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 13215 PENN ST SUITE 402, Whittier, CA 90602. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| PSY 11954 | CA | Forensic Psychologist primary |
| PSY 11954 | CA | Clinical Neuropsychologist |
| PSY 11954 | CA | Clinical Psychologist |
This provider holds licence PSY 11954 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Psychologist Billing Independently
- PAC ID
- 7315113065
- Enrollment ID
- I20111229000434
Medicare enrolment is recorded as approved under the provider type Practitioner - Psychologist Billing Independently. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Forensic covers
A psychologist whose specialty is characterized by activities primarily intended to provide professional psychological expertise within the judicial and legal systems. NUCC Health Care Provider Taxonomy, code 103TF0200X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 103TF0200X | Forensic Psychologist Forensic | PSY 11954 | CA | primary |
| 103G00000X | Clinical Neuropsychologist | PSY 11954 | CA | |
| 103TC0700X | Clinical Psychologist Clinical | PSY 11954 | CA |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1154401479 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 17, 2006 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | PSY.D. |
| Practice address |
13215 PENN ST SUITE 402 Whittier, CA 90602 (562) 945-2233 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 1 | 5 | 4 | 4 | 0 | 1 | 4 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 1 | 4 | 8 | 0 | 2 | 4 | 5 |
Sum = 51 · next multiple of 10 = 60 · check digit = 9 · actual last digit = 9
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.