Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

NECHEMYA GRUENSTEIN LPC
NPI 1982431128
Counselor - Professional in Waterbury, CT

Active since September 19, 2024PECOS Enrolled
142 GRIGGS ST, WATERBURY, CT 06704(786) 897-9855 Get Directions Write a Review

NPPES record last updated: October 13, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Oct 13, 2026, Apr 15, 2026, Sep 19, 2024 (3 updates tracked since 2024).

About Nechemya Gruenstein Lpc NPPES

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

NECHEMYA GRUENSTEIN LPC (NPI 1982431128) is an individual professional provider in Waterbury, Connecticut, licensed in Connecticut (9220) and active in the NPI registry since September 2024. He is enrolled in Medicare PECOS and is a graduate of Other (2023).

NPPES Registry Identity

NPI1982431128
Entity TypeIndividualMale
Primary Taxonomy101YP2500X
Provider Legal NameNECHEMYA GRUENSTEINCredential: LPC
Location Address142 GRIGGS STWaterbury, CT 06704-3110
Mailing Address141 E Main StWaterbury, CT 06702-2310 · (786) 897-9855
Sole ProprietorNo
Medical School CMSOtherGraduated 2023
Enumeration DateSeptember 19, 2024
Last NPPES UpdateOctober 13, 20263 updates tracked since enumeration
NPPES CertifiedOctober 13, 2026
✔ NPI 1982431128 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · ProfessionalBehavioral Health & Social Service Providers
Taxonomy Code101YP2500X
License✔ Licensed in CT · 9220
142 GRIGGS ST, Waterbury, CT 06704

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Nechemya Gruenstein Lpc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5193292779
PECOS Enrollment IDI20260501000153
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 Nechemya Gruenstein reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Same address
Rehabilitation, Substance Use Disorder
142 GRIGGS ST
Waterbury, CT 06704
  • Reassigned Medicare billing, Connecticut enrollment
  • 18 clinicians in this Medicare group
Professional
228 MEADOW STREET SUITE 403B LEFT
Waterbury, CT 06702
  • Reassigned Medicare billing, Connecticut enrollment
  • 6 clinicians in this Medicare group

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

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.

Student in an Organized Health Care Education/Training Program
142 GRIGGS ST
WATERBURY, CT 06704
Counselor (Professional)
142 GRIGGS ST, MORRIS FOUNDATION, INC-THERAPEUTIC CENTER
WATERBURY, CT 06704
Community Health Worker
142 GRIGGS ST, THERAPEUTIC SHELTER
WATERBURY, CT 06704
Student in an Organized Health Care Education/Training Program
142 GRIGGS ST
WATERBURY, CT 06704
Student in an Organized Health Care Education/Training Program
142 GRIGGS ST
WATERBURY, CT 06704
Student in an Organized Health Care Education/Training Program
142 GRIGGS ST
WATERBURY, CT 06704
Student in an Organized Health Care Education/Training Program
142 GRIGGS ST
WATERBURY, CT 06704
Clinic/Center (Rehabilitation, Substance Use Disorder)
142 GRIGGS ST
WATERBURY, CT 06704

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 Nechemya Gruenstein's NPI number?

The NPI number for Nechemya Gruenstein is 1982431128. It was assigned to this individual provider in the NPPES registry on September 19, 2024.

Where is Nechemya Gruenstein located?

Nechemya Gruenstein practices at 142 Griggs St, Waterbury, CT 06704. The listed phone number is (786) 897-9855.

What is Nechemya Gruenstein's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Professional, with taxonomy code 101YP2500X.

Is Nechemya Gruenstein enrolled in Medicare?

Yes. Nechemya Gruenstein is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Nechemya Gruenstein's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nechemya Gruenstein reassigns Medicare benefits to 2 organizations: Wellmore, Inc (Waterbury, CT) and Upward Counseling PLLC (Waterbury, CT). 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 Nechemya Gruenstein'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 Nechemya Gruenstein was last updated on October 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 days 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.