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JENNIFER FLANAGAN LCSW, PC
NPI 1578845731
Social Worker - Clinical in Sayville, NY

Active since September 14, 2011
296 N MAIN ST, SUITE ONE, SAYVILLE, NY 11782(631) 472-2629 Get Directions Write a Review

NPPES record last updated: December 4, 2012. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Jennifer Flanagan Lcsw, Pc NPPES

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

JENNIFER FLANAGAN LCSW, PC (NPI 1578845731) is a healthcare organization registered as a clinical in Sayville, New York and active in the NPI registry since September 2011. The organization lists Jennifer Marie Flanagan, Lcsw, as its authorized official.

NPPES Registry Identity

NPI1578845731
Entity TypeOrganization
Primary Taxonomy1041C0700X
Legal Business NameJENNIFER FLANAGAN LCSW, PC
Location Address296 N MAIN ST, SUITE ONESayville, NY 11782-2550
Mailing Address296 North Main Street, Suite OneSayville, NY 11782 · (631) 472-2629
Phone(631) 472-2629
Organization SubpartNo
Authorized OfficialJennifer Marie FlanaganLcsw · (631) 472-2629
Enumeration DateSeptember 14, 2011
Last NPPES UpdateDecember 4, 2012
✔ NPI 1578845731 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 NY · 053699-1
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.
296 N MAIN ST, Sayville, NY 11782
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Other Identifiers 1

OtherN8K171NY · Medicare

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Jennifer Flanagan Lcsw, Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by February 28, 2027

Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.

StateEnrollment IDDue date
StateNew YorkEnrollment IDO20110915000137Non-DME Part B · Clinic/Group PracticeDue dateFebruary 28, 2027
Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Jennifer Flanagan Lcsw, PC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Jennifer Flanagan, LCSW
Clinical Social Worker
NPI 1669696613
296 N MAIN ST SUITE ONE
Sayville, NY 11782
(631) 472-2629
✔ 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 Jennifer Flanagan Lcsw, PC's NPI number?

The NPI number for Jennifer Flanagan Lcsw, PC is 1578845731. It was assigned to this organization in the NPPES registry on September 14, 2011.

Where is Jennifer Flanagan Lcsw, PC located?

Jennifer Flanagan Lcsw, PC is located at 296 N Main St Suite One, Sayville, NY 11782. The listed phone number is (631) 472-2629.

What is Jennifer Flanagan Lcsw, PC's specialty?

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

Is Jennifer Flanagan Lcsw, PC enrolled in Medicare?

Yes. Jennifer Flanagan Lcsw, PC is registered in the Medicare PECOS enrollment system.

When is Jennifer Flanagan Lcsw, PC's Medicare revalidation due?

According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (New York, Clinic/Group Practice) is due for revalidation by February 28, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.

How many clinicians bill Medicare through Jennifer Flanagan Lcsw, PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Clinical Social Worker) reassigns their Medicare billing to Jennifer Flanagan Lcsw, PC. 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 Jennifer Flanagan Lcsw, PC was last updated on December 4, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.