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M. JENNIFER DEMARCO D.O., LLC
NPI 1588749535
Family Medicine in Amityville, NY

Active since October 26, 2006
191 GRAND CENTRAL AVE, AMITYVILLE, NY 11701(631) 598-2318 Get Directions Write a Review

NPPES record last updated: October 1, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About M. Jennifer Demarco D.o., Llc NPPES

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

M. JENNIFER DEMARCO D.O., LLC (NPI 1588749535) is a healthcare organization registered as a family medicine in Amityville, New York and active in the NPI registry since October 2006. The organization lists Mary Jennifer Demarco, Doctor, as its authorized official.

NPPES Registry Identity

NPI1588749535
Entity TypeOrganization
Primary Taxonomy207Q00000X
Legal Business NameM. JENNIFER DEMARCO D.O., LLC
Location Address191 GRAND CENTRAL AVEAmityville, NY 11701-3706
Mailing Address191 Grand Central AveAmityville, NY 11701-3706
Phone(631) 598-2318
Organization SubpartNo
Authorized OfficialMary Jennifer DemarcoDoctor · (631) 598-2318
Enumeration DateOctober 26, 2006
Last NPPES UpdateOctober 1, 2007
✔ NPI 1588749535 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in NY · 219063
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
191 GRAND CENTRAL AVE, Amityville, NY 11701
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Other Identifiers 2

Medicare UPINH43644NY
Medicare PINWES481NY

Group Practice 1

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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

M. Jennifer Demarco D.o., Llc 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 M. Jennifer Demarco D.O., LLC, which bills Medicare for the services this clinician delivers.

Clinician (1)

M Demarco, D.O.
Family Practice
NPI 1265611131
191 GRAND CENTRAL AVE
Amityville, NY 11701
(631) 598-2318
✔ 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 M. Jennifer Demarco D.O., LLC's NPI number?

The NPI number for M. Jennifer Demarco D.O., LLC is 1588749535. It was assigned to this organization in the NPPES registry on October 26, 2006.

Where is M. Jennifer Demarco D.O., LLC located?

M. Jennifer Demarco D.O., LLC is located at 191 Grand Central Ave, Amityville, NY 11701. The listed phone number is (631) 598-2318.

What is M. Jennifer Demarco D.O., LLC's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is M. Jennifer Demarco D.O., LLC enrolled in Medicare?

Yes. M. Jennifer Demarco D.O., LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through M. Jennifer Demarco D.O., LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Family Practice) reassigns their Medicare billing to M. Jennifer Demarco D.O., LLC. 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 M. Jennifer Demarco D.O., LLC was last updated on October 1, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.