GWENDOLYN WILLIAMSON LMSW
NPI 1639311202
Social Worker - Clinical in Portage, MI

Active since March 29, 2009PECOS EnrolledAccepts Medicare Assignment
1125 E MILHAM AVE STE B, PORTAGE, MI 49002(269) 312-1446 Get Directions Write a Review

NPPES record last updated: May 29, 2020. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Gwendolyn Williamson Lmsw NPPES

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

GWENDOLYN WILLIAMSON LMSW (NPI 1639311202) is an individual clinical provider in Portage, Michigan, licensed in Michigan (6801079449) and active in the NPI registry since March 2009. She is enrolled in Medicare PECOS, maintains a secondary practice location in Howell, and is a graduate of Wayne State University School Of Medicine (1999).

NPPES Registry Identity

NPI1639311202
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameGWENDOLYN WILLIAMSONCredential: LMSW
Location Address1125 E MILHAM AVE STE BPortage, MI 49002-3096
Mailing Address4337 E Grand River Ave, # 147Howell, MI 48843-6583 · (248) 379-6975 · Fax (248) 319-1143
Sole ProprietorYes
Medical School CMSWayne State University School Of MedicineGraduated 1999
Enumeration DateMarch 29, 2009
Last NPPES UpdateMay 29, 2020
NPPES CertifiedMay 29, 2020
NPI 1639311202 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License Licensed in MI · 6801079449
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.

1125 E MILHAM AVE STE B, Portage, MI 49002

Other Names 1

Other Name (5)Wendy Williamson Lmsw

Secondary Practice Location 1

Location 14337 E Grand River Ave, #147Howell, MI 48843-6583 · Phone (248) 379-6975 · Fax (248) 319-1143

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Gwendolyn Williamson Lmsw 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 ID6002865433
PECOS Enrollment IDI20050112000991
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 49002 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 $54.34 – $166.68
Typical copayment $0.00 (range $13.58 – $41.67)
Most-billed visit code NA
Established Patient
$68.07 typical visit price
range $17.09 – $135.40
Typical copayment $17.01 (range $4.27 – $33.85)
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 13

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

Social Worker (Clinical)
1125 E MILHAM AVE STE B
PORTAGE, MI 49002
Psychologist
1125 E MILHAM AVE STE B
PORTAGE, MI 49002
Social Worker (Clinical)
1125 E MILHAM AVE STE B
PORTAGE, MI 49002
Social Worker (Clinical)
1125 E MILHAM AVE STE B
PORTAGE, MI 49002
Counselor (Professional)
1125 E MILHAM AVE STE B
PORTAGE, MI 49002
Social Worker (Clinical)
1125 E MILHAM AVE STE B
PORTAGE, MI 49002
Family Medicine
1125 E MILHAM AVE STE B
PORTAGE, MI 49002
Counselor (Professional)
1125 E MILHAM AVE STE B
PORTAGE, MI 49002

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 Gwendolyn Williamson's NPI number?

The NPI number for Gwendolyn Williamson is 1639311202. It was assigned to this individual provider in the NPPES registry on March 29, 2009. The provider is also known as Wendy Williamson Lmsw.

Where is Gwendolyn Williamson located?

Gwendolyn Williamson practices at 1125 E Milham Ave Ste B, Portage, MI 49002. The listed phone number is (269) 312-1446.

What is Gwendolyn Williamson's specialty?

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

Is Gwendolyn Williamson enrolled in Medicare?

Yes. Gwendolyn Williamson 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.

What insurance does Gwendolyn Williamson accept?

Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company, McLaren Health Plan Community and Priority Health list Gwendolyn Williamson 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 Gwendolyn Williamson was last updated on May 29, 2020. NPI Profile syncs with the weekly NPPES data releases published by CMS.