Ben Li, MD
Ben Li, MD is a Maternal & Fetal Medicine Physician in San Francisco, CA, registered under NPI 1003019001.
Getting there
Here is what surrounds this office in San Francisco, based on OpenStreetMap data collected Aug 30, 2026. Parking is available about 912 ft away at 450 South Street Garage. The nearest transit stop is 405 ft away, served by 16th Street & Illinois Street. A pharmacy sits 0.32 mi from the entrance (Kaiser Mission Bay Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 637 ft away.
Getting here and what is nearby
Restaurant SF Kebab 0.00 mi ~1 min
550 16th Street, San Francisco
Mo-Sa 11:00-22:00; Su 11:00-21:00; PH closed
Pharmacy Walgreens 217 ft ~1 min
Mo-Fr 09:00-18:00; Sa-Su 09:00-15:00
Transit 16th Street & 4th Street 247 ft ~1 min
Coffee Philz Coffee 333 ft ~2 min
Mo-Fr 05:30-17:30; Sa,Su 07:00-17:30
Transit 16th Street & 4th Street 379 ft ~2 min
Parking Third Street Garage 371 ft ~2 min
1650 3rd Street, San Francisco 94158
Restaurant Dumpling Time Thrive City 370 ft ~2 min
Transit 16th Street & Illinois Street 405 ft ~2 min
Restaurant Gott's Roadside 494 ft ~2 min
151 Warriors Way, San Francisco 94158
Mo-Su 11:00-21:00
Coffee Peasant Pies 636 ft ~3 min
Coffee Double Shot Coffee 637 ft ~3 min
Parking Chase Center Garage 881 ft ~4 min
Parking 450 South Street Garage 912 ft ~4 min
150 Warriors Way
Pharmacy Kaiser Mission Bay Pharmacy 0.32 mi ~7 min
Convenience New Potrero Market 0.46 mi ~10 min
1301 18th Street, San Francisco 94107
Convenience Jim's Smoke Shop & Deli 0.48 mi ~10 min
Grocery Gus's Community Market 0.49 mi ~10 min
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 |
|---|---|---|
| A111887 | CA | Maternal & Fetal Medicine Physician primary |
This provider holds licence A111887 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 - Obstetrics/gynecology
- PAC ID
- 0648463836
- Enrollment ID
- I20101020000677
Medicare enrolment is recorded as approved under the provider type Practitioner - Obstetrics/gynecology. 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 Maternal & Fetal Medicine covers
An obstetrician/gynecologist who cares for, or provides consultation on, patients with complications of pregnancy. This specialist has advanced knowledge of the obstetrical, medical and surgical complications of pregnancy and their effect on both the mother and the fetus. The specialist also possesses expertise in the most current diagnostic and treatment modalities used in the care of patients with complicated pregnancies. NUCC Health Care Provider Taxonomy, code 207VM0101X
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 | 1003019001 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 7, 2007 |
| Last updated | Sep 8, 2015 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | MD |
| Practice address |
550 16TH STREET UCSF WOMENS HEALTH San Francisco, CA 94143 (214) 590-8058 |
| Other identifiers |
BP1-0026455
· Other |
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 | 0 | 1 | 9 | 0 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 1 | 9 | 0 | 0 |
Sum = 39 · next multiple of 10 = 40 · check digit = 1 · actual last digit = 1
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.