Marguerite Fahrner, NP, MSN
Marguerite Fahrner, NP, MSN is a Community Health/Public Health Clinical Nurse Specialist in San Francisco, CA, registered under NPI 1548392574. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 1001 POTRERO AVE FL BLDG.9-2ND SFGH - OCCUPATIONAL HEALTH SERVICE, San Francisco, CA 94110. 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 |
|---|---|---|
| CNS1281 | CA | Community Health/Public Health Clinical… primary |
| RN190587 | CA | Occupational Health Registered Nurse |
| NPF2524 | CA | Occupational Health Nurse Practitioner |
This provider holds licence CNS1281 issued in CA. 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 Community Health/Public Health covers
Definition to come... NUCC Health Care Provider Taxonomy, code 364SC1501X
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 | |
|---|---|---|---|---|
| 364SC1501X | Community Health/Public Health Clinical Nurse Specialist Community Health/Public Health | CNS1281 | CA | primary |
| 163WX0106X | Occupational Health Registered Nurse Occupational Health | RN190587 | CA | |
| 363LX0106X | Occupational Health Nurse Practitioner Occupational Health | NPF2524 | 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 | 1548392574 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 13, 2007 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | NP, MSN |
| Practice address |
1001 POTRERO AVE FL BLDG.9-2ND SFGH - OCCUPATIONAL HEALTH SERVICE San Francisco, CA 94110 (415) 206-6770 Fax (415) 206-6073 |
| Other identifiers |
032094
· Other |
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 | 5 | 4 | 8 | 3 | 9 | 2 | 5 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 5 | 8 | 8 | 6 | 9 | 4 | 5 | 5 |
Sum = 76 · next multiple of 10 = 80 · check digit = 4 · actual last digit = 4
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.