Joshua Seymour, RN
Joshua Seymour, RN is a General Practice Registered Nurse in Mountain View, CA, registered under NPI 1386430361. This provider registers 8 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 211 HOPE ST # 331, Mountain View, CA 94041. 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 |
|---|---|---|
| 666988 | CA | Addiction (Substance Use Disorder)… |
| 666988 | CA | Case Management Registered Nurse |
| 666988 | CA | Diabetes Educator Registered Nurse |
| 666988 | CA | Emergency Registered Nurse |
| 666988 | CA | Infusion Therapy Registered Nurse |
| 666988 | CA | Home Health Registered Nurse |
| 666988 | CA | Nutrition Support Registered Nurse |
| 666988 | CA | General Practice Registered Nurse primary |
This provider holds licence 666988 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 General Practice covers
Definition to come... NUCC Health Care Provider Taxonomy, code 163WG0000X
All registered taxonomy codes
This provider registers 8 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 163WA0400X | Addiction (Substance Use Disorder) Registered Nurse Addiction (Substance Use Disorder) | 666988 | CA | |
| 163WC0400X | Case Management Registered Nurse Case Management | 666988 | CA | |
| 163WD0400X | Diabetes Educator Registered Nurse Diabetes Educator | 666988 | CA | |
| 163WE0003X | Emergency Registered Nurse Emergency | 666988 | CA | |
| 163WI0500X | Infusion Therapy Registered Nurse Infusion Therapy | 666988 | CA | |
| 163WH0200X | Home Health Registered Nurse Home Health | 666988 | CA | |
| 163WN1003X | Nutrition Support Registered Nurse Nutrition Support | 666988 | CA | |
| 163WG0000X | General Practice Registered Nurse General Practice | 666988 | CA | primary |
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 | 1386430361 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 16, 2025 |
| Last updated | Apr 16, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | RN |
| Practice address |
211 HOPE ST # 331 Mountain View, CA 94041 (408) 702-5214 |
| Other names |
Avi Seysky Other Name |
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 | 3 | 8 | 6 | 4 | 3 | 0 | 3 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 3 | 7 | 6 | 8 | 3 | 0 | 3 | 3 |
Sum = 59 · next multiple of 10 = 60 · check digit = 1 · actual last digit = 1
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.