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SEAFORD FAMILY PRACTICE-INTERNAL MEDICINE PC
NPI 1184768517
Clinic/Center - Primary Care in Seaford, NY

Active since February 18, 2007CLIA 33D0159010 · Waiver
3921 MERRICK RD, SEAFORD, NY 11783(516) 785-0660(516) 785-1099 Get Directions Write a Review

NPPES record last updated: November 4, 2013. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Seaford Family Practice-internal Medicine Pc NPPES

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

SEAFORD FAMILY PRACTICE-INTERNAL MEDICINE PC (NPI 1184768517) is a healthcare organization registered as a primary care in Seaford, New York and active in the NPI registry since February 2007. The organization holds a CLIA Waiver certificate valid through April 26, 2027 and lists Myrna R Elfenbein, Office Administrator, as its authorized official.

NPPES Registry Identity

NPI1184768517
Entity TypeOrganization
Primary Taxonomy261QP2300X
Legal Business NameSEAFORD FAMILY PRACTICE-INTERNAL MEDICINE PC
Location Address3921 MERRICK RDSeaford, NY 11783-2823
Mailing Address3921 Merrick RdSeaford, NY 11783-2823 · (516) 785-0660 · Fax (516) 785-1099
Phone(516) 785-0660
Fax(516) 785-1099
Organization SubpartNo
Authorized OfficialMyrna R ElfenbeinOffice Administrator · (516) 785-0660
Enumeration DateFebruary 18, 2007
Last NPPES UpdateNovember 4, 2013
✔ NPI 1184768517 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/Center · Primary CareAmbulatory Health Care Facilities
Taxonomy Code261QP2300X
License✔ Licensed in NY · 07653
3921 MERRICK RD, Seaford, NY 11783
Open in Google Maps ↗

Other Identifiers 2

Other07653NY · State License
Medicare ID-Type UnspecifiedW30941NY · Group Medicare Number

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Seaford Family Practice-internal Medicine Pc 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 Seaford Family Practice-Internal Medicine PC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Jeffrey Elfenbein, D.O.
Internal Medicine
NPI 1043308695
3921 MERRICK RD
Seaford, NY 11783
(516) 785-0660
✔ 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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 33D0159010

Seaford Family Prac/Internal Med PC · Seaford, NY
Active · expires Apr 26, 2027
CLIA Number33D0159010
Laboratory TypePhysician Office
Certificate Effective DateApril 27, 2025
Certificate Expiration DateApril 26, 2027
Laboratory DirectorDr. Jeffrey J. Elfenbein
Laboratory Phone(516) 785-0660
Laboratory LocationSeaford Family Prac/Internal Med PC3921 Merrick Road, Seaford, NY 11783
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory to perform only waived tests.

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 Seaford Family Practice-Internal Medicine PC's NPI number?

The NPI number for Seaford Family Practice-Internal Medicine PC is 1184768517. It was assigned to this organization in the NPPES registry on February 18, 2007.

Where is Seaford Family Practice-Internal Medicine PC located?

Seaford Family Practice-Internal Medicine PC is located at 3921 Merrick Rd, Seaford, NY 11783. The listed phone number is (516) 785-0660.

What is Seaford Family Practice-Internal Medicine PC's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Primary Care, with taxonomy code 261QP2300X.

Is Seaford Family Practice-Internal Medicine PC enrolled in Medicare?

Yes. Seaford Family Practice-Internal Medicine PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Seaford Family Practice-Internal Medicine PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Seaford Family Practice-Internal Medicine 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.

Does Seaford Family Practice-Internal Medicine PC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 33D0159010) is associated with this NPI, valid through April 26, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Seaford Family Practice-Internal Medicine PC was last updated on November 4, 2013. 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.