Sheryl Tan
Sheryl Tan is a provider specialising in Nutrition Education Nutritionist in San Francisco, CA, registered under NPI 1417335100.
Getting there
The practice address on file is 1520 STOCKTON ST, San Francisco, CA 94133. 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 |
|---|---|---|
| 1061900 | CA | Nutrition Education Nutritionist primary |
This provider holds licence 1061900 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 - Registered Dietitian Or Nutrition Professional
- PAC ID
- 8325352123
- Enrollment ID
- I20150807013639
Medicare enrolment is recorded as approved under the provider type Practitioner - Registered Dietitian Or Nutrition Professional. 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 Nutrition, Education covers
Definition to come... NUCC Health Care Provider Taxonomy, code 133NN1002X
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 | 1417335100 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 13, 2015 |
| Last updated | May 13, 2015 |
| Status | Active |
| Sole proprietor | No |
| Practice address |
1520 STOCKTON ST San Francisco, CA 94133 (415) 391-9685 |
| Mailing address |
165 SAINT FRANCIS BLVD Daly City, CA 94015 |
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 | 1 | 7 | 3 | 3 | 5 | 1 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 4 | 2 | 7 | 6 | 3 | 1 | 1 | 0 |
Sum = 50 · next multiple of 10 = 50 · 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.