Matthew Yap, PHARMD
Matthew Yap, PHARMD is a Pharmacist in Union City, CA, registered under NPI 1003428384. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Union City, based on OpenStreetMap data collected Sep 26, 2026. Parking is available about 271 ft away. There is EV charging 0.20 mi from the office (Tesla Supercharger) — useful if you are driving in from out of town. The nearest transit stop is 332 ft away, served by Decoto Road & Union Square. If you arrive early, there is a coffee shop 741 ft away.
Getting here and what is nearby
Parking 70 ft ~1 min
Transit Decoto Road & Union Square 86 ft ~1 min
Transit Decoto Road & Meyers Drive 98 ft ~1 min
Restaurant McDonald's 128 ft ~1 min
27 Union Square, Union City 94587-3557
05:00-21:00
Parking 205 ft ~1 min
Restaurant Pho Mama 220 ft ~1 min
1630 Decoto Road, Union City 94587
Mo-Su 10:30-21:00
Coffee Mr Green Bubble 246 ft ~1 min
Parking 271 ft ~2 min
Restaurant Wingstop 276 ft ~2 min
Transit Decoto Road & Union Square 332 ft ~2 min
EV charging 451 ft ~2 min
Coffee Jenjon's Cafe 629 ft ~3 min
1704 Decoto Road, Union City 94587
Coffee Happy Lemon 741 ft ~3 min
Grocery Marina Grocery 897 ft ~4 min
1791 Decoto Road, Union City 94587
Mo-Th 09:00-21:00; Fr-Sa 08:00-21:30; Su 08:00-21:00
Convenience Chevron 968 ft ~4 min
1990 Decoto Road, Union City 94587
Gas station Chevron 956 ft ~4 min
Grocery Safeway 941 ft ~4 min
EV charging Tesla Supercharger 0.20 mi ~5 min
Convenience Niles Liquors & Mini-mart 0.25 mi ~5 min
34359 Alvarado-Niles Road, Union City 94587
Grocery Bharat Bazar 0.25 mi ~5 min
34301 Alvarado-Niles Road, Union City 94587
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 |
|---|---|---|
| 82969 | CA | Pharmacist primary |
This provider holds licence 82969 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 | 1003428384 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 18, 2020 |
| Last updated | Aug 18, 2020 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | PHARMD |
| Practice address |
1650 DECOTO RD Union City, CA 94587 (510) 429-0195 |
| Mailing address |
3605 MONTROSE PL Livermore, CA 94551 |
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 | 2 | 8 | 3 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 2 | 7 | 3 | 7 |
Sum = 56 · next multiple of 10 = 60 · 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.