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HARRIS HILL COUNSELING LCSW PLLC
NPI 1447784798
Social Worker - Clinical in Williamsville, NY

Active since April 13, 2017
8612 MAIN ST STE 1, WILLIAMSVILLE, NY 14221(716) 458-0055(716) 328-0015 Get Directions Write a Review

NPPES record last updated: August 3, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 3, 2026, Apr 13, 2026, Feb 18, 2022 and 4 more (7 updates tracked since 2017).

About Harris Hill Counseling Lcsw Pllc NPPES

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

HARRIS HILL COUNSELING LCSW PLLC (NPI 1447784798), doing business as Thriveworks Buffalo Lcsw Pllc, is a healthcare organization registered as a clinical in Williamsville, New York and active in the NPI registry since April 2017. The organization lists Jonathan Sadkin, C.o.o., as its authorized official.

NPPES Registry Identity

NPI1447784798
Entity TypeOrganization
Primary Taxonomy1041C0700X
Legal Business NameHARRIS HILL COUNSELING LCSW PLLC
Location Address8612 MAIN ST STE 1Williamsville, NY 14221-7462
Mailing Address8612 Main St Ste 1Williamsville, NY 14221-7462 · (716) 458-0055 · Fax (716) 328-0015
Phone(716) 458-0055
Fax(716) 328-0015
Organization SubpartNo
Authorized OfficialJonathan SadkinC.o.o. · (716) 458-0055
Enumeration DateApril 13, 2017
Last NPPES UpdateAugust 3, 20267 updates tracked since enumeration
NPPES CertifiedAugust 3, 2026
✔ NPI 1447784798 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
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 ListedCounselor · ProfessionalTaxonomy 101YP2500X
8612 MAIN ST STE 1, Williamsville, NY 14221
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Other Names 1

Former Legal Business NameThriveworks Buffalo Lcsw Pllc

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Harris Hill Counseling Lcsw Pllc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Harris Hill Counseling Lcsw PLLC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Wendy Sadkin, LCSW
Clinical Social Worker
NPI 1003999434
8612 MAIN ST STE 1
Williamsville, NY 14221
(716) 458-0055
✔ PECOS✔ Accepts MedicareSame address

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 Harris Hill Counseling Lcsw PLLC's NPI number?

The NPI number for Harris Hill Counseling Lcsw PLLC is 1447784798. It was assigned to this organization in the NPPES registry on April 13, 2017. The provider was formerly known as Thriveworks Buffalo LCSW PLLC.

Where is Harris Hill Counseling Lcsw PLLC located?

Harris Hill Counseling Lcsw PLLC is located at 8612 Main St Ste 1, Williamsville, NY 14221. The listed phone number is (716) 458-0055.

What is Harris Hill Counseling Lcsw PLLC's specialty?

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

Is Harris Hill Counseling Lcsw PLLC enrolled in Medicare?

Yes. Harris Hill Counseling Lcsw PLLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Harris Hill Counseling Lcsw PLLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Clinical Social Worker) reassigns their Medicare billing to Harris Hill Counseling Lcsw PLLC. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Harris Hill Counseling Lcsw PLLC was last updated on August 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.