SAN MATEO MEDICAL CENTER
SAN MATEO MEDICAL CENTER is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1821233958, based in Redwood City, CA. It is classified under Multi-Specialty Clinic/Center.
Getting there
The practice address on file is 630 LAUREL ST, Redwood City, CA 94063. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 220000015 | CA | Multi-Specialty Clinic/Center primary |
This provider holds licence 220000015 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 Multi-Specialty covers
Definition to come... NUCC Health Care Provider Taxonomy, code 261QM1300X
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-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1821233958 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Dec 3, 2008 |
| Last updated | Oct 16, 2025 |
| Status | Active |
| Practice address |
630 LAUREL ST Redwood City, CA 94063 (650) 701-0334 |
| Mailing address |
222 W 39TH AVE San Mateo, CA 94403 |
| Other identifiers |
GR0028871
· Medicaid (CA) |
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 | 8 | 2 | 1 | 2 | 3 | 3 | 9 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 8 | 4 | 1 | 4 | 3 | 6 | 9 | 1 |
Sum = 62 · next multiple of 10 = 70 · 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.