Nancy Arce-wallach, ASW
Nancy Arce-wallach, ASW is a provider specialising in Social Worker in Berkeley, CA, registered under NPI 1003129206. 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 Berkeley, based on OpenStreetMap data collected Sep 7, 2026. Parking is available about 0.35 mi away at RSF Garage. There is EV charging 0.40 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 301 ft away, served by Haste Street & Shattuck Avenue. A pharmacy sits 0.51 mi from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 511 ft away.
Getting here and what is nearby
Transit Shattuck Avenue & Dwight Way 138 ft ~1 min
Pharmacy Valor Compounding Pharmacy 166 ft ~1 min
Transit Shattuck Avenue & Dwight Way 204 ft ~1 min
Coffee Way Station Brew 205 ft ~1 min
2120 Dwight Way, Berkeley 94704
Mo-Su 08:00-18:00
Restaurant Southside Station 228 ft ~1 min
2504 Shattuck Avenue, Berkeley 94704
Mo-Th 10:00-15:00,16:00-21:00; Fr-Sa 10:00-21:00; Su 10:00-18:00
Convenience Shattuck Market 274 ft ~2 min
Restaurant Musashi 257 ft ~1 min
2126 Dwight Way, Berkeley 94704
Tu-Sa 11:30-14:00
Transit Haste Street & Shattuck Avenue 301 ft ~2 min
Coffee Qahwa Time 293 ft ~2 min
Restaurant 4 Dreams Nepali Indian Cuisine 356 ft ~2 min
Coffee Royal Ground Coffee 511 ft ~2 min
2409 Shattuck Avenue, Berkeley 94704
Mo-Sa 07:00-16:00; Su 07:00-15:00
Gas station Shell 1,010 ft ~4 min
2200 Durant Avenue, Berkeley 94704
Hotel Downtown Berkeley Inn 0.27 mi ~6 min
2001 Bancroft Way
Parking Ellsworth Parking Structure 0.29 mi ~6 min
2325;2337;2339 Haste Street
Parking Kittredge St Garage 0.30 mi ~6 min
2020 Kittredge Street, Berkeley
Convenience E-Z Stop Deli 0.31 mi ~7 min
2233 Shattuck Avenue, Berkeley 94704
Mo 08:00-21:45; Tu-Fr 07:30-22:45; Sa 08:30-22:45; Su 08:30-21:45
Hotel Hotel Shattuck Plaza 0.34 mi ~7 min
Parking RSF Garage 0.35 mi ~7 min
2299 Bancroft Way, Berkeley 94704
EV charging 0.40 mi ~9 min
Convenience City Lee's Market 0.41 mi ~9 min
Pharmacy Walgreens 0.42 mi ~9 min
Hotel Residence Inn by Marriott Berkeley 0.45 mi ~9 min
Grocery Berkeley Bowl 0.50 mi ~11 min
2020 Oregon Street, Berkeley
Mo-Sa 09:00-20:00; Su 10:00-19:00
Pharmacy CVS Pharmacy 0.51 mi ~11 min
2655 Telegraph Avenue, Berkeley
Mo-Fr 10:00-13:30,14:00-20:00; Su 11:00-13:30,14:00-17:00; Sa 10:00-13:30,14:00-18:00
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 |
|---|---|---|
| ASW27507 | CA | Social Worker primary |
This provider holds licence ASW27507 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Clinical Social Worker
- PAC ID
- 7315228251
- Enrollment ID
- I20170106001900
Medicare enrolment is recorded as approved under the provider type Practitioner - Clinical Social Worker. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Social Worker covers
A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public. NUCC Health Care Provider Taxonomy, code 104100000X
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 | 1003129206 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 16, 2010 |
| Last updated | Jan 24, 2022 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | ASW |
| Practice address |
2484 SHATTUCK AVE 210 Berkeley, CA 94704 (510) 704-7475 Fax (510) 704-7494 |
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 | 2 | 9 | 2 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 2 | 9 | 2 | 0 |
Sum = 44 · next multiple of 10 = 50 · check digit = 6 · actual last digit = 6
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.