Stephen Cohen, MD
Stephen Cohen, MD is an Infectious Disease Physician in San Francisco, CA, registered under NPI 1003241878. 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 13, 2026. Parking is available about 0.24 mi away. The nearest transit stop is 839 ft away, served by 10th Avenue & Pacheco Street.
Getting here and what is nearby
Transit Laguna Honda Boulevard & Clarendon Avenue 579 ft ~3 min
Parking 705 ft ~3 min
Transit Laguna Honda Boulevard & Clarendon Avenue 751 ft ~3 min
Transit 10th Avenue & Pacheco Street 839 ft ~4 min
Parking 929 ft ~4 min
Parking 0.24 mi ~5 min
Restaurant Yogi Sushi House 0.33 mi ~7 min
Restaurant Chouchou 0.33 mi ~7 min
Restaurant Dumpling Zone 0.33 mi ~7 min
408 Dewey Boulevard, San Francisco 94116
Mo-Su 11:00-21:30
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 |
|---|---|---|
| GFE13992 | CA | Infectious Disease Physician primary |
This provider holds licence GFE13992 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 Infectious Disease covers
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine. NUCC Health Care Provider Taxonomy, code 207RI0200X
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 | 1003241878 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Sep 11, 2013 |
| Last updated | Sep 11, 2013 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | MD |
| Practice address |
40 VENTURA AVE San Francisco, CA 94116 (415) 681-2171 Fax (415) 681-2171 |
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 | 2 | 4 | 1 | 8 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 4 | 2 | 8 | 5 |
Sum = 52 · next multiple of 10 = 60 · check digit = 8 · actual last digit = 8
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.