Allan Shiau, RPH
Allan Shiau, RPH is a Pharmacist in Compton, CA, registered under NPI 1003136870.
Getting there
Here is what surrounds this office in Compton, based on OpenStreetMap data collected Sep 7, 2026. Parking is available about 251 ft away. A pharmacy sits 238 ft from the entrance (Rite Aid), which helps if you leave with a prescription.
Getting here and what is nearby
Gas station Zy Oil 213 ft ~1 min
Parking 207 ft ~1 min
Parking 226 ft ~1 min
Parking 251 ft ~1 min
Pharmacy Rite Aid 238 ft ~1 min
Restaurant KFC 531 ft ~3 min
221 South Long Beach Boulevard, Compton 90221
Mo-Th 10:00-21:00; Fr 10:00-22:00; Sa-Su 10:00-21:00
Gas station 76 0.48 mi ~10 min
Restaurant Domino's 0.48 mi ~10 min
821 South Long Beach Boulevard, Compton 90221
10:00-01:00
Restaurant Carl's Jr. 0.49 mi ~10 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 |
|---|---|---|
| 44838 | CA | Pharmacist primary |
This provider holds licence 44838 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 Pharmacist covers
An individual licensed by the appropriate state regulatory agency to engage in the practice of pharmacy. The practice of pharmacy includes, but is not limited to, assessment, interpretation, evaluation, and implementation, initiation, monitoring or modification of medication and or medical orders; the compounding or dispensing of medication and or medical orders; participation in drug and device procurement, storage, and selection; drug administration; drug regimen reviews; drug or drug-related research; provision of patient education and the provision of those acts or services necessary to provide medication therapy management services in all areas of patient care. NUCC Health Care Provider Taxonomy, code 183500000X
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 | 1003136870 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 3, 2010 |
| Last updated | Aug 11, 2010 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | RPH |
| Practice address |
107 S LONG BEACH BLVD Compton, CA 90221 (310) 639-8026 |
| Mailing address |
6119 N MUSCATEL AVE San Gabriel, CA 91775 |
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 | 1 | 3 | 6 | 8 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 3 | 3 | 8 | 5 |
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.