Marta Reynoso, LCSW
Marta Reynoso, LCSW is a provider specialising in Clinical Social Worker in Hayward, CA, registered under NPI 1003203944. 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 Hayward, based on OpenStreetMap data collected Sep 11, 2026. Parking is available about 832 ft away. The nearest transit stop is 804 ft away, served by Silva Avenue & Thomas Avenue.
Getting here and what is nearby
Parking 408 ft ~2 min
Parking 435 ft ~2 min
Transit Silva Avenue & Leighton Street 723 ft ~3 min
Transit Meek Avenue & Jackson Street 727 ft ~3 min
Transit Silva Avenue & Thomas Avenue 804 ft ~4 min
Parking 832 ft ~4 min
Gas station Valero 0.27 mi ~6 min
Restaurant McDonald's 0.37 mi ~8 min
23989 Watkins Street, Hayward 94544-1028
05:30-22:00
Restaurant Giant Burger 0.40 mi ~9 min
241340 Mission Boulevard
Gas station Chevron 0.42 mi ~9 min
Convenience ExtraMile 0.43 mi ~9 min
24086 Mission Boulevard
Hotel Days Inn & Suites by Wyndham Hayward 0.44 mi ~9 min
24400 Mission Boulevard, Hayward 94544
Restaurant Favorite Indian Restaurant 0.44 mi ~9 min
24052 Mission Boulevard
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 |
|---|---|---|
| 28394 | CA | Clinical Social Worker primary |
This provider holds licence 28394 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
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 | 1003203944 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 17, 2015 |
| Last updated | Apr 17, 2015 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | LCSW |
| Practice address |
409 JACKSON ST SUITE 200 Hayward, CA 94544 (510) 891-5650 |
| Mailing address |
954 HELEN AVE San Leandro, CA 94577 |
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 | 2 | 0 | 3 | 9 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 0 | 6 | 9 | 8 |
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.