Joseph Locaria, MA
Joseph Locaria, MA is an Addiction (Substance Use Disorder) Counselor in Fremont, CA, registered under NPI 1003005398. 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 Fremont, based on OpenStreetMap data collected Aug 28, 2026. Parking is available about 0.34 mi away. The nearest transit stop is 0.41 mi away, served by Thornton Avenue & Balboa Way. If you arrive early, there is a coffee shop 0.42 mi away.
Getting here and what is nearby
Parking 387 ft ~2 min
Parking 0.34 mi ~7 min
Parking 0.34 mi ~7 min
Transit Thornton Avenue & Contra Costa Avenue 0.38 mi ~8 min
Convenience 7-Eleven 0.38 mi ~8 min
Restaurant Subway 0.39 mi ~8 min
4380 Thornton Avenue
Mo-Th 08:00-21:00; Fr-Sa 08:00-22:00; Su 09:00-21:00
Restaurant Biryani Adda & Cafe 0.39 mi ~8 min
Restaurant Little Caesars 0.39 mi ~8 min
Transit Thornton Avenue & Cabrillo Drive 0.40 mi ~9 min
Transit Thornton Avenue & Balboa Way 0.41 mi ~9 min
Coffee Cabrillo Park Cafe 0.42 mi ~9 min
Convenience Peralta Discount Liquors 0.42 mi ~9 min
Grocery Middle East Food Market 0.46 mi ~10 min
4097 Peralta Boulevard, Fremont 94536
Mo-Fr 08:00-18:00; Sa,Su 08:00-17:00
Grocery Alquds Market 0.46 mi ~10 min
Grocery Damavand Market 0.48 mi ~10 min
37012 Towers Way, Fremont 94536
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 |
|---|---|---|
| L0412282008 | CA | Addiction (Substance Use Disorder)… primary |
This provider holds licence L0412282008 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 Addiction (Substance Use Disorder) covers
Definition to come... NUCC Health Care Provider Taxonomy, code 101YA0400X
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 | 1003005398 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 23, 2007 |
| Last updated | Oct 23, 2007 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | MA |
| Practice address |
4510 PERALTA BLVD SUITE 1 Fremont, CA 94536 (510) 713-3202 Fax (510) 713-0684 |
| Other identifiers |
L0412282008
· Other (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 | 5 | 3 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 0 | 1 | 3 | 9 |
Sum = 42 · next multiple of 10 = 50 · 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.