Paul Gerstenfeld, MS, OTR/L, CHT
Paul Gerstenfeld, MS, OTR/L, CHT is a Hand Occupational Therapist in Santa Monica, CA, registered under NPI 1639269277. This provider registers 5 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 147 BAY ST UNIT 21, Santa Monica, CA 90405. 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 |
|---|---|---|
| OT4713 | CA | Occupational Therapist |
This provider holds licence OT4713 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 - Occupational Therapist In Private Practice
- PAC ID
- 4082658265
- Enrollment ID
- I20050617000932
Medicare enrolment is recorded as approved under the provider type Practitioner - Occupational Therapist In Private Practice. 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 Hand covers
Definition to come... NUCC Health Care Provider Taxonomy, code 225XH1200X
All registered taxonomy codes
This provider registers 5 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 225000000X | Orthotic Fitter | — | — | |
| 225X00000X | Occupational Therapist | OT4713 | CA | |
| 225XE1200X | Ergonomics Occupational Therapist Ergonomics | — | — | |
| 225XH1200X | Hand Occupational Therapist Hand | — | — | primary |
| 225XN1300X | Neurorehabilitation Occupational Therapist Neurorehabilitation | — | — |
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 | 1639269277 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 13, 2006 |
| Last updated | Mar 7, 2012 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | MS, OTR/L, CHT |
| Practice address |
147 BAY ST UNIT 21 Santa Monica, CA 90405 (310) 396-8565 Fax (310) 396-0052 |
| Mailing address |
858 14TH ST APT 3 Santa Monica, CA 90403 |
| Other identifiers |
1059271
· Other (CA) OT4713 · Other (CA) |
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 | 6 | 3 | 9 | 2 | 6 | 9 | 2 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 6 | 9 | 4 | 6 | 9 | 2 | 5 |
Sum = 73 · next multiple of 10 = 80 · check digit = 7 · actual last digit = 7
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.