Randal Williams
Randal Williams is a provider specialising in Contractor in Fountain Valley, CA, registered under NPI 1003334152. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty. 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 Fountain Valley, based on OpenStreetMap data collected Sep 19, 2026. Parking is available about 0.52 mi away. There is EV charging 0.49 mi from the office (Tesla Supercharger) — useful if you are driving in from out of town. The nearest transit stop is 717 ft away, served by Euclid-Ent 17300 Valley Park. If you arrive early, there is a coffee shop 0.42 mi away.
Getting here and what is nearby
Transit Euclid-Slater 83 ft ~1 min
Transit Euclid-Slater 236 ft ~1 min
Transit Euclid-Ent 17300 Valley Park 717 ft ~3 min
Parking 0.31 mi ~7 min
Restaurant Subway 0.40 mi ~9 min
Restaurant Phonic 0.41 mi ~9 min
Coffee Starbucks 0.42 mi ~9 min
17850 Newhope Street, Fountain Valley 92708
Mo-Th 04:30-20:00; Fr 04:30-21:00; Sa 04:30-19:30; Su 05:30-19:30
Restaurant Olea Mediterranian Grill 0.43 mi ~9 min
Parking 0.44 mi ~9 min
Convenience 7-Eleven 0.46 mi ~10 min
EV charging Tesla Supercharger 0.49 mi ~10 min
Parking 0.52 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 |
|---|---|---|
| 131190 | CA | Clinical Social Worker |
This provider holds licence 131190 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 Contractor covers
For the purposes of the Health Care Provider Taxonomy, a contractor is limited to individuals who do construction or mechanical work to modify a patient's environment to accommodate a health condition. Contractors perform projects including, but not limited to, building wheelchair ramps, widening doorways, modifying personal vehicles, and making other improvements for patient access and movement. This code has no relation to a provider's employment status. NUCC Health Care Provider Taxonomy, code 171W00000X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 171W00000X | Contractor | — | — | primary |
| 1041C0700X | Clinical Social Worker Clinical | 131190 | CA |
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 | 1003334152 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Sep 8, 2017 |
| Last updated | Mar 5, 2026 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Practice address |
17264 EUCLID ST APT H Fountain Valley, CA 92708 (949) 300-6415 |
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 | 3 | 3 | 4 | 1 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 3 | 8 | 1 | 1 |
Sum = 48 · next multiple of 10 = 50 · check digit = 2 · actual last digit = 2
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.