Alexander Black, ACSW
Alexander Black, ACSW is a provider specialising in Clinical Social Worker in Los Angeles, CA, registered under NPI 1003518028. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
Here is what surrounds this office in Los Angeles, based on OpenStreetMap data collected Sep 8, 2026. Parking is available about 785 ft away. The nearest transit stop is 230 ft away, served by 42nd Place & Avalon.
Getting here and what is nearby
Transit Avalon & 42nd Place 158 ft ~1 min
Transit 42nd Place & Avalon 193 ft ~1 min
Transit 42nd Place & Avalon 230 ft ~1 min
Parking 425 ft ~2 min
Parking 483 ft ~2 min
Parking 785 ft ~3 min
Restaurant El Pollo Loco 0.24 mi ~5 min
4405 Avalon Boulevard, Los Angeles 90011
Mo-Su 09:30-22:30
Gas station 76 0.31 mi ~7 min
Restaurant Church's Chicken 0.34 mi ~7 min
Restaurant Delicious at the Dunbar 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 |
|---|---|---|
| 114171 | CA | Clinical Social Worker primary |
This provider holds licence 114171 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 Clinical covers
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances. NUCC Health Care Provider Taxonomy, code 1041C0700X
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 | |
|---|---|---|---|---|
| 1041C0700X | Clinical Social Worker Clinical | 114171 | CA | primary |
| 104100000X | Social Worker | — | — |
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 | 1003518028 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 21, 2023 |
| Last updated | May 27, 2025 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | ACSW |
| Practice address |
4211 AVALON BLVD Los Angeles, CA 90011 (323) 233-0425 |
| Mailing address |
4047 HALLDALE AVE Los Angeles, CA 90062 |
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 | 5 | 1 | 8 | 0 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 1 | 7 | 0 | 4 |
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.