Sarah Janssen, MD, PHD, MPH
Sarah Janssen, MD, PHD, MPH is a Preventive Medicine/Occupational Environmental Medicine Physician in San Francisco, CA, registered under NPI 1285714972.
Getting there
The practice address on file is 601 VAN NESS AVE STE 2008 KAISER PERMANENTE OCCUPATIONAL MEDICINE, San Francisco, CA 94102. 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 |
|---|---|---|
| A84125 | CA | Preventive Medicine/Occupational… primary |
This provider holds licence A84125 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 - Preventive Medicine
- PAC ID
- 8123029790
- Enrollment ID
- I20070124000746
Medicare enrolment is recorded as approved under the provider type Practitioner - Preventive 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 Preventive Medicine/Occupational Environmental Medicine covers
A preventive medicine physician who specializes in preventive medicine/occupational-environmental medicine, which is focused on protecting the population from occupational and environmental conditions. NUCC Health Care Provider Taxonomy, code 2083P0500X
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 | 1285714972 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 17, 2006 |
| Last updated | Dec 13, 2021 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD, PHD, MPH |
| Practice address |
601 VAN NESS AVE STE 2008 KAISER PERMANENTE OCCUPATIONAL MEDICINE San Francisco, CA 94102 (415) 833-2000 |
| Mailing address |
1916 RUSSELL ST Berkeley, CA 94703 |
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 | 8 | 5 | 7 | 1 | 4 | 9 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 7 | 5 | 5 | 1 | 8 | 9 | 5 |
Sum = 68 · next multiple of 10 = 70 · check digit = 2 · actual last digit = 2
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.