Alexander Sidhom, MD
Alexander Sidhom, MD is a Pediatrics Physician in Redwood City, CA, registered under NPI 1003444001. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
Here is what surrounds this office in Redwood City, based on OpenStreetMap data collected Sep 27, 2026. Parking is available about 0.49 mi away at Marshal Street Garage. The nearest transit stop is 0.42 mi away, served by Jefferson Avenue & Marshall Street. If you arrive early, there is a coffee shop 0.48 mi away.
Getting here and what is nearby
Parking 329 ft ~2 min
Transit Veterans Boulevard & Brewster Avenue 711 ft ~3 min
Transit Veterans Boulevard & Brewster Avenue 1,007 ft ~4 min
Parking Whipple Park and Ride 0.20 mi ~4 min
W. of Rte. 101 at S.W. quad of Veterans Blvd./Whipple Ave., Redwood City 94063
Convenience Food Mart 0.22 mi ~5 min
Gas station Arco 0.22 mi ~5 min
504 Whipple Avenue, Redwood City
Convenience ampm 0.23 mi ~5 min
Gas station Chevron 0.24 mi ~5 min
585 Whipple Avenue, Redwood City 94063
Restaurant Chick-fil-A 0.25 mi ~5 min
536 Whipple Avenue, Redwood City 94063
Mo-Sa 06:30-22:00
Convenience 76 0.27 mi ~6 min
Restaurant Pizza Hut 0.27 mi ~6 min
Restaurant In-N-Out Burger 0.28 mi ~6 min
Hotel Good Nite Inn Redwood City 0.29 mi ~6 min
Grocery La Paradita Peru 0.33 mi ~7 min
1500 Industrial Way
Fr 10:00-20:00; Sa,Su[-1] 10:00-15:00
Coffee Starbucks 0.40 mi ~8 min
Walnut Street, Redwood City 94063
Mo-Fr 05:30-18:00; Sa,Su 06:00-18:00
Coffee Quickly 0.40 mi ~9 min
300 Walnut Street, Redwood City 94063
Su-Th 11:00-20:00; Fr-Sa 11:00-23:45
Transit Jefferson Avenue & Marshall Street 0.42 mi ~9 min
Grocery Chavez Supermarket 0.42 mi ~9 min
775 Arguello Street
Coffee Coupa Café 0.48 mi ~10 min
Gas station Speedway Express 0.49 mi ~10 min
Parking Marshal Street Garage 0.49 mi ~10 min
750 Marshall Street, 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 |
|---|---|---|
| A185761 | CA | Pediatrics Physician primary |
This provider holds licence A185761 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 Pediatrics covers
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development. NUCC Health Care Provider Taxonomy, code 208000000X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 208000000X | Pediatrics Physician | A185761 | CA | primary |
| 390200000X | Student in an Organized Health Care Education/Training Program | — | — |
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 | 1003444001 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 27, 2020 |
| Last updated | Feb 10, 2026 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | MD |
| Practice address |
570 PRICE AVE STE 400 Redwood City, CA 94063 (650) 466-6224 Fax (650) 466-6219 |
| Mailing address |
155 N FRESNO ST Fresno, CA 93701 |
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 | 4 | 4 | 0 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 4 | 8 | 0 | 0 |
Sum = 49 · next multiple of 10 = 50 · 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.