1. Home
  2. Directory
  3. Massachusetts
  4. Lee
  5. Social Worker
  6. NPI Profile

COLLABORATIVE ENDEAVORS, LLC
NPI 1609507680
Social Worker - Clinical in Lee, MA

Active since June 21, 2022
10 VALLEY ST. BLDG D #436, LEE, MA 01238(413) 358-8752 Get Directions Write a Review

NPPES record last updated: November 11, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 11, 2025, Apr 6, 2023 (2 updates tracked since 2023).

About Collaborative Endeavors, Llc NPPES

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

COLLABORATIVE ENDEAVORS, LLC (NPI 1609507680) is a healthcare organization registered as a clinical in Lee, Massachusetts and active in the NPI registry since June 2022. The organization lists Christina P Marks, Owner, as its authorized official.

NPPES Registry Identity

NPI1609507680
Entity TypeOrganization
Primary Taxonomy1041C0700X
Legal Business NameCOLLABORATIVE ENDEAVORS, LLC
Location Address10 VALLEY ST. BLDG D #436Lee, MA 01238-0436
Mailing Address10 Valley St. Bldg D #436Lee, MA 01238-0436 · (413) 358-8752
Phone(413) 358-8752
Organization SubpartNo
Authorized OfficialChristina P MarksOwner · (413) 358-8752
Enumeration DateJune 21, 2022
Last NPPES UpdateNovember 11, 20252 updates tracked since enumeration
NPPES CertifiedNovember 11, 2025
✔ NPI 1609507680 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 · Mental HealthTaxonomy 101YM0800X

Other Identifiers 1

Other0000P11223MA · Bcbs Of Ma

Group Practice 2

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP
Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Collaborative Endeavors, Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

4

Medicare enrollment records show 4 clinicians reassign Medicare billing to Collaborative Endeavors, LLC, which bills Medicare for the services they deliver. They are listed nearest first.

Clinicians, nearest first (4)

Heather Dinneen
Clinical Social Worker
NPI 1164203105
1180 ASHLEY FALLS RD STE A
Ashley Falls, MA 01222
(860) 671-9315
✔ PECOS✔ Accepts Medicare
Emma Lenski
Mental Health Counselor
NPI 1528608619
359 FENN ST
Pittsfield, MA 01201
(413) 499-0412
✔ PECOS✔ Accepts Medicare
Christina Marks, LICSW
Clinical Social Worker
NPI 1982774261
114 HOUSATONIC ST STE 2
Lee, MA 01238
(413) 358-8752
✔ PECOS✔ Accepts Medicare
April Zaragoza, MS
Mental Health Counselor
NPI 1417520032
173 WATER ST STE 1
Williamstown, MA 01267
(413) 770-2249
✔ PECOS✔ Accepts Medicare

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 Collaborative Endeavors, LLC's NPI number?

The NPI number for Collaborative Endeavors, LLC is 1609507680. It was assigned to this organization in the NPPES registry on June 21, 2022.

Where is Collaborative Endeavors, LLC located?

Collaborative Endeavors, LLC is located at 10 Valley St. Bldg D #436, Lee, MA 01238. The listed phone number is (413) 358-8752.

What is Collaborative Endeavors, LLC's specialty?

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

Is Collaborative Endeavors, LLC enrolled in Medicare?

Yes. Collaborative Endeavors, LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Collaborative Endeavors, LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 4 clinicians reassign their Medicare billing to Collaborative Endeavors, LLC, in Clinical Social Worker and Mental Health Counselor. 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.

What insurance does Collaborative Endeavors, LLC accept?

Health plans from Anthem Blue Cross and Blue Shield list Collaborative Endeavors, LLC 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 Collaborative Endeavors, LLC was last updated on November 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.