Alexander Page, M.D.
Alexander Page, M.D. is a Vascular & Interventional Radiology Physician in Santa Rosa, CA, registered under NPI 1225471337. 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 121 SOTOYOME ST, Santa Rosa, CA 95405. 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 |
|---|---|---|
| A163429 | CA | Vascular & Interventional Radiology… primary |
This provider holds licence A163429 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 - Interventional Radiology
- PAC ID
- 0941505085
- Enrollment ID
- I20191108002678
Medicare enrolment is recorded as approved under the provider type Practitioner - Interventional Radiology. 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 Vascular & Interventional Radiology covers
A radiologist who diagnoses and treats diseases by various radiologic imaging modalities. These include fluoroscopy, digital radiography, computed tomography, sonography and magnetic resonance imaging. NUCC Health Care Provider Taxonomy, code 2085R0204X
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 | 1225471337 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 9, 2013 |
| Last updated | Aug 7, 2019 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | M.D. |
| Practice address |
121 SOTOYOME ST Santa Rosa, CA 95405 (707) 525-4003 |
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 | 2 | 2 | 5 | 4 | 7 | 1 | 3 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 4 | 5 | 8 | 7 | 2 | 3 | 6 |
Sum = 63 · next multiple of 10 = 70 · 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.