Ken Choi
Ken Choi is a Pharmacist in San Francisco, CA, registered under NPI 1003428996. 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 San Francisco, based on OpenStreetMap data collected Sep 26, 2026. Parking is available about 0.38 mi away. The nearest transit stop is 273 ft away, served by 32nd Avenue & Balboa Street. A pharmacy sits 0.38 mi from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.20 mi away.
Getting here and what is nearby
Transit 33rd Avenue & Balboa Street 118 ft ~1 min
Transit 33rd Avenue & Balboa Street 181 ft ~1 min
Transit 32nd Avenue & Balboa Street 273 ft ~2 min
Convenience Better Food Market 251 ft ~1 min
3149 Balboa Street, 94121
Mo-Th 09:00-22:00; Fr 09:00-23:00; Sa 10:00-23:00; Su 10:00-22:00
Restaurant Pizza Joint 331 ft ~2 min
Restaurant Golden Chariot Bakery & Restaurant 474 ft ~2 min
3308 Balboa Street, 94121
Coffee Sweet Time 558 ft ~3 min
3319 Balboa Street, 94121
Restaurant Chino's 798 ft ~4 min
Coffee Simple Pleasures Cafe 873 ft ~4 min
Coffee The Sweet House 0.20 mi ~5 min
3506 Balboa Street, 94121
Parking 0.21 mi ~5 min
Parking 0.23 mi ~5 min
Gas station 76 Gas 0.36 mi ~8 min
Grocery Grocery Outlet 0.36 mi ~8 min
6333 Geary Boulevard, San Francisco 94121
Sa-Su 08:00-22:00
Parking 0.38 mi ~8 min
Pharmacy CVS Pharmacy 0.38 mi ~8 min
377 32nd Avenue, San Francisco 94121
Mo-Fr 07:00-22:00; Sa 07:00-22:00; Su 08:00-21:00
Grocery Andronico's 0.40 mi ~8 min
Convenience Balboa Bi-rite Market 0.41 mi ~9 min
Convenience Richmond Market 0.47 mi ~10 min
3950 Balboa Street
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 82988 | CA | Pharmacist primary |
This provider holds licence 82988 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Pharmacist covers
An individual licensed by the appropriate state regulatory agency to engage in the practice of pharmacy. The practice of pharmacy includes, but is not limited to, assessment, interpretation, evaluation, and implementation, initiation, monitoring or modification of medication and or medical orders; the compounding or dispensing of medication and or medical orders; participation in drug and device procurement, storage, and selection; drug administration; drug regimen reviews; drug or drug-related research; provision of patient education and the provision of those acts or services necessary to provide medication therapy management services in all areas of patient care. NUCC Health Care Provider Taxonomy, code 183500000X
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 | 1003428996 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 20, 2020 |
| Last updated | Aug 20, 2020 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Practice address |
670 33RD AVE San Francisco, CA 94121 (415) 519-6295 |
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 | 4 | 2 | 8 | 9 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 2 | 7 | 9 | 9 |
Sum = 64 · next multiple of 10 = 70 · check digit = 6 · actual last digit = 6
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.