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GARY S ROSENBAUM MD PC
NPI 1346559192
Internal Medicine - Infectious Disease in Riverhead, NY

Active since September 28, 2010
887 OLD COUNTRY RD, SUITE A, RIVERHEAD, NY 11901(631) 727-6122(631) 727-2672 Get Directions Write a Review

NPPES record last updated: September 28, 2010. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Gary S Rosenbaum Md Pc NPPES

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

GARY S ROSENBAUM MD PC (NPI 1346559192) is a healthcare organization registered as an infectious disease in Riverhead, New York and active in the NPI registry since September 2010. The organization lists Sharyn Donnelly, Office Administrator, as its authorized official.

NPPES Registry Identity

NPI1346559192
Entity TypeOrganization
Primary Taxonomy207RI0200X
Legal Business NameGARY S ROSENBAUM MD PC
Location Address887 OLD COUNTRY RD, SUITE ARiverhead, NY 11901-2115
Mailing Address887 Old Country Rd, Suite ARiverhead, NY 11901-2115 · (631) 727-6122 · Fax (631) 727-2672
Phone(631) 727-6122
Fax(631) 727-2672
Organization SubpartNo
Authorized OfficialSharyn DonnellyOffice Administrator · (631) 727-6122
Enumeration DateSeptember 28, 2010
✔ NPI 1346559192 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License✔ Licensed in NY · 1735421
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
887 OLD COUNTRY RD, Riverhead, NY 11901
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Other Identifiers 2

Medicare PIN041F522NY
Medicaid011924229NY

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)

Gary S Rosenbaum Md 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 Gary S Rosenbaum MD PC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Gary Rosenbaum, MD
Infectious Disease
NPI 1437261385
887 OLD COUNTRY RD SUITE A
Riverhead, NY 11901
(631) 727-6122
✔ 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 Gary S Rosenbaum MD PC's NPI number?

The NPI number for Gary S Rosenbaum MD PC is 1346559192. It was assigned to this organization in the NPPES registry on September 28, 2010.

Where is Gary S Rosenbaum MD PC located?

Gary S Rosenbaum MD PC is located at 887 Old Country Rd Suite A, Riverhead, NY 11901. The listed phone number is (631) 727-6122.

What is Gary S Rosenbaum MD PC's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Gary S Rosenbaum MD PC enrolled in Medicare?

Yes. Gary S Rosenbaum MD PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Gary S Rosenbaum MD PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Infectious Disease) reassigns their Medicare billing to Gary S Rosenbaum 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 Gary S Rosenbaum MD PC was last updated on September 28, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.