Frank Lien, DO
Frank Lien, DO is a Family Medicine Physician in Redwood City, CA, registered under NPI 1003254145.
Getting there
Here is what surrounds this office in Redwood City, based on OpenStreetMap data collected Sep 14, 2026. Parking is available about 0.32 mi away at Marshal Street Garage. The nearest transit stop is 708 ft away, served by Veterans Boulevard & Hansen Way. A pharmacy sits 658 ft from the entrance (Kaiser Permanente Marshall 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 Veterans Boulevard & Walnut Street 182 ft ~1 min
Pharmacy Kaiser Permanente Cypress Pharmacy 181 ft ~1 min
1190 Veterans Boulevard, Redwood City
Transit Veterans Boulevard & Maple Street 249 ft ~1 min
Restaurant Applebee's 432 ft ~2 min
Pharmacy Kaiser Permanente Marshall Pharmacy 658 ft ~3 min
905 Maple Street, Redwood City 94063
Restaurant Taco Bell 641 ft ~3 min
1103 Veterans Boulevard, Redwood City 94063
Mo-Su 07:00-24:00
Transit Veterans Boulevard & Hansen Way 708 ft ~3 min
Convenience 7-Eleven 821 ft ~4 min
Hotel Garden Motel 847 ft ~4 min
1690 Broadway, Redwood City
Restaurant Erik's Delicafé 919 ft ~4 min
Coffee Starbucks 946 ft ~4 min
Walnut Street, Redwood City 94063
Mo-Fr 05:30-18:00; Sa,Su 06:00-18:00
Coffee Taza 964 ft ~4 min
Coffee Quickly 0.20 mi ~4 min
300 Walnut Street, Redwood City 94063
Su-Th 11:00-20:00; Fr-Sa 11:00-23:45
Parking 0.20 mi ~4 min
1495 Veterans Boulevard, Redwood City
Parking 0.23 mi ~5 min
1107 Veterans Boulevard, Redwood City
Gas station Marathon 0.25 mi ~6 min
1603 Broadway, Redwood City
Convenience GVT Petroleum 0.26 mi ~6 min
1603 Broadway, Redwood City
Grocery Grocery Outlet 0.26 mi ~6 min
1833 Broadway, Redwood City 94063
PH,Mo-Su 08:00-22:00
Gas station Chevron 0.28 mi ~6 min
Convenience Main Street Market 0.31 mi ~7 min
804 Main Street, Redwood City 94063
Parking Marshal Street Garage 0.32 mi ~7 min
750 Marshall Street, Redwood City
Hotel Niche Hotel 0.37 mi ~8 min
Grocery Smart & Final 0.50 mi ~10 min
1185 Broadway, Redwood City
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 |
|---|---|---|
| 20A15755 | CA | Family Medicine Physician primary |
This provider holds licence 20A15755 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 - Family Practice
- PAC ID
- 2567755200
Enrolled in Medicare 3 times, across 3 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| California | I20180427002074 | Practitioner - Family Practice |
| Oregon | I20230327000661 | Practitioner - Family Practice |
| Washington | I20230330001535 | Practitioner - Family Practice |
Medicare enrolment is recorded as approved under the provider type Practitioner - Family Practice. There are 3 separate enrolment records across 3 states (CA, OR, WA). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. 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 Family Medicine covers
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity. NUCC Health Care Provider Taxonomy, code 207Q00000X
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 | 1003254145 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 11, 2013 |
| Last updated | Dec 3, 2022 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | DO |
| Practice address |
1190 VETERANS BLVD Redwood City, CA 94063 (650) 299-2234 |
| Mailing address |
400 EL CAMINO REAL UNIT 222 Belmont, CA 94002 |
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 | 5 | 4 | 1 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 5 | 8 | 1 | 8 |
Sum = 55 · next multiple of 10 = 60 · check digit = 5 · actual last digit = 5
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.