Geoffrey Yoon, M.D.
Geoffrey Yoon, M.D. is an Advanced Heart Failure and Transplant Cardiology Physician in Mountain View, CA, registered under NPI 1023298353. 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 701 E EL CAMINO REAL, Mountain View, CA 94040. 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 |
|---|---|---|
| A105364 | CA | Internal Medicine Physician |
| A105364 | CA | Cardiovascular Disease Physician |
| A105364 | CA | Advanced Heart Failure and Transplant… primary |
This provider holds licence A105364 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 - Advanced Heart Failure And Transplant Cardiology
- PAC ID
- 2860630373
- Enrollment ID
- I20131111000932
Medicare enrolment is recorded as approved under the provider type Practitioner - Advanced Heart Failure And Transplant Cardiology. 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 Advanced Heart Failure and Transplant Cardiology covers
Specialists in Advanced Heart Failure and Transplant Cardiology would participate in the inpatient and outpatient management of patients with advanced heart failure across the spectrum from consideration for high-risk cardiac surgery, cardiac transplantation, or mechanical circulatory support, to pre-and post-operative evaluation and management of patients with cardiac transplants and mechanical support devices, and end-of-life care for patients with end-stage heart failure. NUCC Health Care Provider Taxonomy, code 207RA0001X
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 | |
|---|---|---|---|---|
| 207R00000X | Internal Medicine Physician | A105364 | CA | |
| 207RC0000X | Cardiovascular Disease Physician Cardiovascular Disease | A105364 | CA | |
| 207RA0001X | Advanced Heart Failure and Transplant Cardiology Physician Advanced Heart Failure and Transplant Cardiology | A105364 | 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 | 1023298353 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Nov 3, 2007 |
| Last updated | Nov 29, 2021 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | M.D. |
| Practice address |
701 E EL CAMINO REAL Mountain View, CA 94040 (650) 404-8300 |
| Mailing address |
393 E WALNUT ST FL 3 Pasadena, CA 91188 |
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 | 0 | 2 | 3 | 2 | 9 | 8 | 3 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 4 | 3 | 4 | 9 | 7 | 3 | 1 |
Sum = 57 · next multiple of 10 = 60 · check digit = 3 · actual last digit = 3
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.