1. Home
  2. Directory
  3. California
  4. Los Angeles
  5. Social Worker
  6. NPI Profile

TANYNA B SOSA-WILLIAMS LCSW
NPI 1174957518
Social Worker - Clinical in Los Angeles, CA

Active since August 21, 2013PECOS Enrolled
1625 W OLYMPIC BLVD STE 600, LOS ANGELES, CA 90015(323) 999-2404 Get Directions Write a Review

NPPES record last updated: September 15, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 12, 2019, Aug 5, 2019, Mar 17, 2018 and 1 more (4 updates tracked since 2017).

About Tanyna B Sosa-williams Lcsw NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

TANYNA B SOSA-WILLIAMS LCSW (NPI 1174957518) is an individual clinical provider in Los Angeles, California, licensed in California (LCSW89756) and active in the NPI registry since August 2013. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1174957518
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameTANYNA B SOSA-WILLIAMSCredential: LCSW
Location Address1625 W OLYMPIC BLVD STE 600Los Angeles, CA 90015-3865
Mailing Address1625 W Olympic Blvd Ste 600Los Angeles, CA 90015-3865 · (323) 999-2404
Phone(323) 999-2404
Sole ProprietorNo
Enumeration DateAugust 21, 2013
Last NPPES UpdateSeptember 15, 20234 updates tracked since enumeration
NPPES CertifiedSeptember 15, 2023
✔ NPI 1174957518 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in CA · LCSW89756
Definition
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.
Also ListedSocial WorkerTaxonomy 104100000X · License LCSW89756 (CA)
1625 W OLYMPIC BLVD STE 600, Los Angeles, CA 90015
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Tanyna B Sosa-williams Lcsw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Tanyna Sosa-williams reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mellow Medical Inc A Professional Corporation
6.1 mi
Psychiatry
8235 SANTA MONICA BLVD, SUITE 300
West Hollywood, CA 90046
  • Reassigned Medicare billing, California enrollment
  • 204 clinicians in this Medicare group
NPI 1407275886 (310) 892-4284
Telehealth Specialty Medical Group
363 mi
Emergency Medicine
3400 DOUGLAS BLVD STE 225
Roseville, CA 95661
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Telemedicine Group PC
  • 205 clinicians in this Medicare group
NPI 1326338237 (916) 740-3721

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90015 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$0.00 typical visit price
range $62.96 – $187.60
Typical copayment $0.00 (range $15.74 – $46.90)
Most-billed visit code NA
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ANGIE GUERRERO
Day Training/Habilitation Specialist
1625 W OLYMPIC BLVD STE 600
LOS ANGELES, CA 90015
Los Angeles County (323) 999-2404
DIGNA ORELLANA
Community Health Worker
1625 W OLYMPIC BLVD STE 600
LOS ANGELES, CA 90015
Los Angeles County (323) 999-2404
RENEE NICHOLE LARGAESPADA
Day Training/Habilitation Specialist
1625 W OLYMPIC BLVD STE 600
LOS ANGELES, CA 90015
Los Angeles County (323) 999-2404
KRISTINA LOUIE
Marriage & Family Therapist
1625 W OLYMPIC BLVD STE 600
LOS ANGELES, CA 90015
Los Angeles County (323) 999-2404
MARIA FERNANDA HERNANDEZ PRIETO
Day Training/Habilitation Specialist
1625 W OLYMPIC BLVD STE 600
LOS ANGELES, CA 90015
Los Angeles County (323) 999-2404
YESENIA MARTINEZ
Social Worker
1625 W OLYMPIC BLVD STE 600
LOS ANGELES, CA 90015
Los Angeles County (323) 999-2404
MILAGROS VIRIDIANA ZAMORA
Peer Specialist
1625 W OLYMPIC BLVD STE 600
LOS ANGELES, CA 90015
Los Angeles County (323) 999-2404
NATALIA BRETADO-CANSECO
Social Worker
1625 W OLYMPIC BLVD STE 600
LOS ANGELES, CA 90015
Los Angeles County (323) 999-2404

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Tanyna Sosa-williams's NPI number?

The NPI number for Tanyna Sosa-williams is 1174957518. It was assigned to this individual provider in the NPPES registry on August 21, 2013.

Where is Tanyna Sosa-williams located?

Tanyna Sosa-williams practices at 1625 W Olympic Blvd Ste 600, Los Angeles, CA 90015. The listed phone number is (323) 999-2404.

What is Tanyna Sosa-williams's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Tanyna Sosa-williams enrolled in Medicare?

Yes. Tanyna Sosa-williams is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Tanyna Sosa-williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Tanyna Sosa-williams reassigns Medicare benefits to 2 organizations: Mellow Medical Inc A Professional Corporation (West Hollywood, CA) and Telehealth Specialty Medical Group (Roseville, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Tanyna Sosa-williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Tanyna Sosa-williams was last updated on September 15, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.