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GLENN S. HAMMER, M.D., P.C.
NPI 1124079025
Internal Medicine - Infectious Disease in New York, NY

Active since May 15, 2006
1100 PARK AVE, SUITE 1C, NEW YORK, NY 10128(212) 427-9550(212) 427-9889 Get Directions Write a Review

NPPES record last updated: April 20, 2008. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Glenn S. Hammer, M.d., P.c. NPPES

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

GLENN S. HAMMER, M.D., P.C. (NPI 1124079025) is a healthcare organization registered as an infectious disease in New York, New York and active in the NPI registry since May 2006. The organization lists Glenn S. Hammer, President, as its authorized official.

NPPES Registry Identity

NPI1124079025
Entity TypeOrganization
Primary Taxonomy207RI0200X
Legal Business NameGLENN S. HAMMER, M.D., P.C.
Location Address1100 PARK AVE, SUITE 1CNew York, NY 10128-1202
Mailing Address1100 Park Ave, Suite 1cNew York, NY 10128-1202 · (212) 427-9550 · Fax (212) 427-9889
Phone(212) 427-9550
Fax(212) 427-9889
Organization SubpartNo
Authorized OfficialGlenn S. HammerPresident · (212) 427-9550
Enumeration DateMay 15, 2006
Last NPPES UpdateApril 20, 2008
✔ NPI 1124079025 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
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.
1100 PARK AVE, New York, NY 10128
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Other Identifiers 2

Medicaid01119346NY
Medicare PINW16491NY

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)

Glenn S. Hammer, M.d., P.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by December 31, 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 IDO20110721000369Non-DME Part B · Clinic/Group PracticeDue dateDecember 31, 2026
Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

3

Medicare enrollment records show 3 clinicians reassign Medicare billing to Glenn S. Hammer, M.D., P.C., which bills Medicare for the services they deliver. Of these, 2 practice at this address and 3 within 10 miles. They are listed nearest first.

Clinicians, nearest first (3)

Glenn Hammer, M.D.
Infectious Disease
NPI 1750333498
1100 PARK AVE SUITE 1C
New York, NY 10128
(212) 427-9550
✔ PECOS✔ Accepts MedicareSame address
Eric Neibart, M.D.
Infectious Disease
NPI 1639120512
1100 PARK AVE SUITE 1C
New York, NY 10128
(212) 427-9550
✔ PECOS✔ Accepts MedicareSame address
Deena Altman, M.D.
Infectious Disease
NPI 1770781171
1 GUSTAVE L LEVY PL
New York, NY 10029
(212) 241-6741
✔ PECOS✔ Accepts Medicare0.6 mi

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 Glenn S. Hammer, M.D., P.C.'s NPI number?

The NPI number for Glenn S. Hammer, M.D., P.C. is 1124079025. It was assigned to this organization in the NPPES registry on May 15, 2006.

Where is Glenn S. Hammer, M.D., P.C. located?

Glenn S. Hammer, M.D., P.C. is located at 1100 Park Ave Suite 1C, New York, NY 10128. The listed phone number is (212) 427-9550.

What is Glenn S. Hammer, M.D., P.C.'s specialty?

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

Is Glenn S. Hammer, M.D., P.C. enrolled in Medicare?

Yes. Glenn S. Hammer, M.D., P.C. is registered in the Medicare PECOS enrollment system.

When is Glenn S. Hammer, M.D., P.C.'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 December 31, 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 Glenn S. Hammer, M.D., P.C.?

According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians, all in Infectious Disease, reassign their Medicare billing to Glenn S. Hammer, M.D., P.C.. 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. Of these, 2 practice at this address and 3 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Glenn S. Hammer, M.D., P.C. was last updated on April 20, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.