Humphrey Ogg
Humphrey Ogg is a Plastic Surgery Registered Nurse in Greenbrae, CA, registered under NPI 1437259140. This provider registers 14 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 250 BON AIR RD, Greenbrae, CA 94904. 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 |
|---|---|---|
| 464138 | CA | Plastic Surgery Registered Nurse primary |
| 464138 | CA | Addiction (Substance Use Disorder)… |
| 464138 | CA | Administrator Registered Nurse |
| 464138 | CA | Critical Care Medicine Registered Nurse |
| 464138 | CA | Community Health Registered Nurse |
| 464138 | CA | Emergency Registered Nurse |
| 464138 | CA | General Practice Registered Nurse |
| 464138 | CA | Home Health Registered Nurse |
| 464138 | CA | Infusion Therapy Registered Nurse |
| 464138 | CA | Pain Management Registered Nurse |
| 464138 | CA | Child & Adolescent Psychiatric/Mental… |
| 464138 | CA | Psychiatric/Mental Health Registered Nurse |
| 464138 | CA | Adult Psychiatric/Mental Health… |
| 464138 | CA | Ambulatory Care Registered Nurse |
This provider holds licence 464138 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 Plastic Surgery covers
Definition to come... NUCC Health Care Provider Taxonomy, code 163WS0121X
All registered taxonomy codes
This provider registers 14 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 163WS0121X | Plastic Surgery Registered Nurse Plastic Surgery | 464138 | CA | primary |
| 163WA0400X | Addiction (Substance Use Disorder) Registered Nurse Addiction (Substance Use Disorder) | 464138 | CA | |
| 163WA2000X | Administrator Registered Nurse Administrator | 464138 | CA | |
| 163WC0200X | Critical Care Medicine Registered Nurse Critical Care Medicine | 464138 | CA | |
| 163WC1500X | Community Health Registered Nurse Community Health | 464138 | CA | |
| 163WE0003X | Emergency Registered Nurse Emergency | 464138 | CA | |
| 163WG0000X | General Practice Registered Nurse General Practice | 464138 | CA | |
| 163WH0200X | Home Health Registered Nurse Home Health | 464138 | CA | |
| 163WI0500X | Infusion Therapy Registered Nurse Infusion Therapy | 464138 | CA | |
| 163WP0000X | Pain Management Registered Nurse Pain Management | 464138 | CA | |
| 163WP0807X | Child & Adolescent Psychiatric/Mental Health Registered Nurse Psychiatric/Mental Health, Child & Adolescent | 464138 | CA | |
| 163WP0808X | Psychiatric/Mental Health Registered Nurse Psychiatric/Mental Health | 464138 | CA | |
| 163WP0809X | Adult Psychiatric/Mental Health Registered Nurse Psychiatric/Mental Health, Adult | 464138 | CA | |
| 163WP2201X | Ambulatory Care Registered Nurse Ambulatory Care | 464138 | 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 | 1437259140 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Sep 23, 2006 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Practice address |
250 BON AIR RD Greenbrae, CA 94904 (415) 331-8588 |
| Mailing address |
PO BOX 1436 1436 Sausalito, CA 94966 |
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 | 4 | 3 | 7 | 2 | 5 | 9 | 1 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 4 | 6 | 7 | 4 | 5 | 9 | 1 | 8 |
Sum = 70 · next multiple of 10 = 70 · check digit = 0 · actual last digit = 0
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.