Sean Nisam
Sean Nisam is a provider specialising in Student in an Organized Health Care Education/Training Program in Vallejo, CA, registered under NPI 1003341777. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Vallejo, based on OpenStreetMap data collected Aug 29, 2026. Parking is available about 454 ft away. The nearest transit stop is 0.23 mi away, served by Broadway Street & Sereno Drive. A pharmacy sits 0.34 mi from the entrance (Walmart Pharmacy), which helps if you leave with a prescription.
Getting here and what is nearby
Parking 308 ft ~2 min
Parking Rehabilitiation Parking 426 ft ~2 min
Parking 454 ft ~2 min
Transit Kaiser Permanente Vallejo Medical Center 617 ft ~3 min
Transit Kaiser Permanente Vallejo Medical Center 814 ft ~4 min
Grocery Food Barn 806 ft ~4 min
Transit Broadway Street & Sereno Drive 0.23 mi ~5 min
Pharmacy Walgreens 0.26 mi ~6 min
Grocery 168 Market 0.30 mi ~7 min
765 Sereno Drive, Vallejo 94589
Mo-Su 09:00-21:00
Pharmacy Walmart Pharmacy 0.34 mi ~7 min
Convenience ExtraMile 0.35 mi ~7 min
Gas station Chevron 0.36 mi ~8 min
Restaurant Wendy's 0.36 mi ~8 min
Grocery Walmart Neighborhood Market 0.36 mi ~8 min
501 Sereno Drive, Vallejo 94589
Mo-Su 06:00-22:00
Restaurant Burger King 0.43 mi ~9 min
3606 Sonoma Boulevard, Vallejo 94590-2946
09:00-20:00
Restaurant Bud's Giant Burgers 0.44 mi ~9 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
- Status
- Approved
- Provider type
- Practitioner - Family Practice
- PAC ID
- 7416360219
- Enrollment ID
- I20210118000294
Medicare enrolment is recorded as approved under the provider type Practitioner - Family Practice. 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 Student in an Organized Health Care Education/Training Program covers
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care. NUCC Health Care Provider Taxonomy, code 390200000X
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 | 1003341777 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 1, 2017 |
| Last updated | Feb 11, 2022 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Practice address |
975 SERENO DR Vallejo, CA 94589 (707) 651-4071 |
| Mailing address |
335 CARRERA DR Mill Valley, CA 94941 |
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 | 0 | 3 | 3 | 4 | 1 | 7 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 4 | 2 | 7 | 5 |
Sum = 53 · next multiple of 10 = 60 · 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.