Gideon Kwok, DO
Gideon Kwok, DO is a provider specialising in Legal Medicine in Rancho Cucamonga, CA, registered under NPI 1700023520. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 12225 FOOTHILL BLVD #120, Rancho Cucamonga, CA 91739. 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 |
|---|---|---|
| 20A8908 | CA | Legal Medicine primary |
This provider holds licence 20A8908 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 Legal Medicine covers
The specialty areas of medicine concerned with matters of, and relations with, substantive law and legal institutions; such as the conduct of medical examinations at crime scenes, performance of autopsies, giving of expert medical testimony in judicial proceedings, medical treatment of inmates of penal institutions, the practice of trauma medicine in law enforcement settings, and other clinical practice and medical science applications in the fields of law, law enforcement, and corrections. NUCC Health Care Provider Taxonomy, code 173000000X
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 | 1700023520 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 15, 2009 |
| Last updated | Jan 15, 2009 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | DO |
| Practice address |
12225 FOOTHILL BLVD #120 Rancho Cucamonga, CA 91739 (909) 922-5100 Fax (909) 922-5150 |
| Mailing address |
12225 FOOTHILL BLVD STE 120 Rancho Cucamonga, CA 91739 |
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 | 7 | 0 | 0 | 0 | 2 | 3 | 5 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 7 | 0 | 0 | 0 | 2 | 6 | 5 | 4 |
Sum = 50 · next multiple of 10 = 50 · check digit = 0 · actual last digit = 0
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.