1. Home
  2. Directory
  3. Illinois
  4. Matteson
  5. Social Worker
  6. NPI Profile

MS. NINA M WILLIAMS LCSW
NPI 1639359698
Social Worker in Matteson, IL

Active since November 07, 2007PECOS EnrolledAccepts Medicare Assignment
21317 S JEFFREY DR, MATTESON, IL 60443(363) 944-5897 Get Directions Write a Review

NPPES record last updated: January 18, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Ms. Nina M Williams Lcsw NPPES

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

MS. NINA M WILLIAMS LCSW (NPI 1639359698) is an individual social worker in Matteson, Illinois, licensed in Illinois (149021613) and active in the NPI registry since November 2007. She is enrolled in Medicare PECOS and is a graduate of Other (2006).

NPPES Registry Identity

NPI1639359698
Entity TypeIndividualFemale
Primary Taxonomy104100000X
Provider Legal NameMS. NINA M WILLIAMSCredential: LCSW
Location Address21317 S JEFFREY DRMatteson, IL 60443-2467
Mailing Address203 Wysteria DrOlympia Fields, IL 60461-1202 · (336) 944-5897
Phone(363) 944-5897
Sole ProprietorYes
Medical School CMSOtherGraduated 2006
Enumeration DateNovember 7, 2007
Last NPPES UpdateJanuary 18, 2024
NPPES CertifiedJanuary 18, 2024
✔ NPI 1639359698 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySocial WorkerBehavioral Health & Social Service Providers
Taxonomy Code104100000X
License✔ Licensed in IL · 149021613
Definition
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.
Also ListedSocial Worker · ClinicalTaxonomy 1041C0700X · License 0904008569 (VA), P006305 (NC), 149021613 (IL)
21317 S JEFFREY DR, Matteson, IL 60443
Open in Google Maps ↗

Other Identifiers 1

Medicaid6005168NC

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ms. Nina M Williams Lcsw is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6507083896
PECOS Enrollment IDI20220512000929
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 Reassignment

Medicare enrollment records show Nina Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Thriveworks Clinical - Illinois
27 mi
Mental Health
333 N MICHIGAN AVE STE 1810
Chicago, IL 60601
  • Reassigned Medicare billing, Illinois enrollment
  • 66 clinicians in this Medicare group
NPI 1164190633 (855) 284-7483

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

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 Nina Williams's NPI number?

The NPI number for Nina Williams is 1639359698. It was assigned to this individual provider in the NPPES registry on November 7, 2007.

Where is Nina Williams located?

Nina Williams practices at 21317 S Jeffrey Dr, Matteson, IL 60443. The listed phone number is (363) 944-5897.

What is Nina Williams's specialty?

The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.

Is Nina Williams enrolled in Medicare?

Yes. Nina Williams is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Nina Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nina Williams reassigns Medicare benefits to Thriveworks Clinical - Illinois (Chicago, IL). The 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 Nina Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Nina Williams accept?

Health plans from Oscar Health list Nina Williams as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Nina Williams was last updated on January 18, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.