Francis Isidoro, M.D.
Francis Isidoro, M.D. is a Nuclear Imaging & Therapy Physician in Stockton, CA, registered under NPI 1548328933. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 2320 N CALIFORNIA ST SUITE 2, Stockton, CA 95204. 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 |
|---|---|---|
| A91432 | CA | Nuclear Imaging & Therapy Physician primary |
| A91432 | CA | Nuclear Medicine Physician |
This provider holds licence A91432 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 - Nuclear Medicine
- PAC ID
- 1254432487
- Enrollment ID
- I20070718000484
Medicare enrolment is recorded as approved under the provider type Practitioner - Nuclear Medicine. 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 Nuclear Imaging & Therapy covers
A nuclear medicine physician who specializes in nuclear imaging and therapy. NUCC Health Care Provider Taxonomy, code 207UN0902X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207UN0902X | Nuclear Imaging & Therapy Physician Nuclear Imaging & Therapy | A91432 | CA | primary |
| 207U00000X | Nuclear Medicine Physician | A91432 | 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 | 1548328933 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 5, 2006 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
2320 N CALIFORNIA ST SUITE 2 Stockton, CA 95204 (209) 466-2000 Fax (209) 466-2600 |
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 | 2 | 8 | 9 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 5 | 8 | 8 | 6 | 2 | 7 | 9 | 6 |
Sum = 77 · next multiple of 10 = 80 · 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.