Marc Zimmermann, PH.D., M.P.
Marc Zimmermann, PH.D., M.P. is a Prescribing (Medical) Psychologist in Baton Rouge, LA, registered under NPI 1093743528. This provider registers 4 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 11911 JUSTICE AVE, Baton Rouge, LA 70816. 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 |
|---|---|---|
| MPAP.000015 | LA | Prescribing (Medical) Psychologist primary |
| 304 | LA | Clinical Psychologist |
| 304 | LA | Addiction (Substance Use Disorder)… |
| 304 | LA | Forensic Psychologist |
This provider holds licence MPAP.000015 issued in LA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Prescribing (Medical) covers
A licensed, doctoral-level psychologist authorized to prescribe and has undergone specialized education and training in preparation for prescriptive practice and has passed an examination accepted by the state board of psychology relevant to establishing competence for prescribing, and has received from the state board of psychology a current certificate granting prescriptive authority, which has not been revoked or suspended. NUCC Health Care Provider Taxonomy, code 103TP0016X
All registered taxonomy codes
This provider registers 4 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 103TP0016X | Prescribing (Medical) Psychologist Prescribing (Medical) | MPAP.000015 | LA | primary |
| 103TC0700X | Clinical Psychologist Clinical | 304 | LA | |
| 103TA0400X | Addiction (Substance Use Disorder) Psychologist Addiction (Substance Use Disorder) | 304 | LA | |
| 103TF0200X | Forensic Psychologist Forensic | 304 | LA |
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 | 1093743528 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 30, 2006 |
| Last updated | Jan 8, 2026 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | PH.D., M.P. |
| Practice address |
11911 JUSTICE AVE Baton Rouge, LA 70816 (225) 751-5412 Fax (225) 751-5847 |
| Mailing address |
PO BOX 86962 Baton Rouge, LA 70879 |
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 | 0 | 9 | 3 | 7 | 4 | 3 | 5 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 9 | 3 | 5 | 4 | 6 | 5 | 4 |
Sum = 62 · next multiple of 10 = 70 · check digit = 8 · actual last digit = 8
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.