DEMETERIO & NEJATHEIM MD PC
NPI 1376810424
Radiology - Diagnostic Radiology in Valley Stream, NY

Q: What is Demeterio & Nejatheim MD PC's NPI number?

The NPI number for Demeterio & Nejatheim MD PC is 1376810424. It was assigned to this organization in the NPPES registry on November 17, 2011.

Q: What is Demeterio & Nejatheim MD PC's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Active since November 17, 2011

265 E MERRICK RD, VALLEY STREAM, NY 11580(516) 825-1667(516) 825-4006 Get Directions Write a Review

NPPES record last updated: November 17, 2011. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About Demeterio & Nejatheim Md Pc NPPES

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

DEMETERIO & NEJATHEIM MD PC (NPI 1376810424) is a healthcare organization registered as a diagnostic radiology in Valley Stream, New York and active in the NPI registry since November 2011. The organization lists Irene Nejatheim, Office Manager, as its authorized official.

NPPES Registry Identity

NPI1376810424

Entity TypeOrganization

Primary Taxonomy2085R0202X

Legal Business NameDEMETERIO & NEJATHEIM MD PC

Location Address265 E MERRICK RDValley Stream, NY 11580-6004

Mailing Address265 E Merrick RdValley Stream, NY 11580-6004 · (516) 825-1667 · Fax (516) 825-4006

Phone(516) 825-1667

Fax(516) 825-4006

Organization SubpartNo

Authorized OfficialIrene NejatheimOffice Manager · (516) 825-1667

Enumeration DateNovember 17, 2011

✔ NPI 1376810424 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0202X

Definition

A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

265 E MERRICK RD, Valley Stream, NY 11580

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Demeterio & Nejatheim Md Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by November 30, 2026

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 IDO20120223000386Non-DME Part B · Clinic/Group PracticeDue dateNovember 30, 2026

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 Demeterio & Nejatheim MD PC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Masood Nejatheim, MD

Diagnostic Radiology

NPI 1710062468

265 EAST MERRICK RD #103
Valley Stream, NY 11580

(516) 825-1667

✔ 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 Demeterio & Nejatheim MD PC's NPI number?

The NPI number for Demeterio & Nejatheim MD PC is 1376810424. It was assigned to this organization in the NPPES registry on November 17, 2011.

Where is Demeterio & Nejatheim MD PC located?

Demeterio & Nejatheim MD PC is located at 265 E Merrick Rd, Valley Stream, NY 11580. The listed phone number is (516) 825-1667.

What is Demeterio & Nejatheim MD PC's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Demeterio & Nejatheim MD PC enrolled in Medicare?

Yes. Demeterio & Nejatheim MD PC is registered in the Medicare PECOS enrollment system.

When is Demeterio & Nejatheim MD 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 November 30, 2026. 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 Demeterio & Nejatheim MD PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Diagnostic Radiology) reassigns their Medicare billing to Demeterio & Nejatheim MD 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 Demeterio & Nejatheim MD PC was last updated on November 17, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.