GEORGE T. YANG, M.D., A PROFESSIONAL CORPORATION
GEORGE T. YANG, M.D., A PROFESSIONAL CORPORATION is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1003008624, based in West Covina, CA. It is classified under Endocrinology, Diabetes & Metabolism Physician.
Getting there
Here is what surrounds this office in West Covina, based on OpenStreetMap data collected Aug 28, 2026. Parking is available about 0.51 mi away. The nearest transit stop is 780 ft away, served by Foothill Transit 272, 281.
Getting here and what is nearby
Transit Foothill Transit 272, 281 526 ft ~2 min
Transit Foothill Transit 272, 281 774 ft ~3 min
Transit Foothill Transit 272, 281 780 ft ~3 min
Convenience ampm 0.32 mi ~7 min
Gas station Arco 0.32 mi ~7 min
1333 West Merced Avenue, West Covina 91790
Gas station Shell 0.34 mi ~7 min
Gas station Chevron 0.36 mi ~8 min
1209 South Sunset Avenue, West Covina 91790
Convenience ExtraMile 0.37 mi ~8 min
Restaurant Dago Taiwanese Restaurant 0.44 mi ~9 min
648 South Sunset Avenue, West Covina 91790
Parking 0.51 mi ~11 min
Grocery GW Supermarket 0.51 mi ~11 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 |
|---|---|---|
| A33505 | CA | Endocrinology, Diabetes & Metabolism… primary |
This provider holds licence A33505 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 Endocrinology, Diabetes & Metabolism covers
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems. NUCC Health Care Provider Taxonomy, code 207RE0101X
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 | 1003008624 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Aug 16, 2007 |
| Last updated | Jul 22, 2010 |
| Status | Active |
| Practice address |
906 S SUNSET AVE STE 102 West Covina, CA 91790 (626) 337-7286 |
| Other identifiers |
00A335050
· 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 | 0 | 0 | 3 | 0 | 0 | 8 | 6 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 0 | 7 | 6 | 4 |
Sum = 46 · next multiple of 10 = 50 · check digit = 4 · actual last digit = 4
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.