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ALEXANDER TOMAS ADLER GREGOR MD
NPI 1881498152
Student in an Organized Health Care Education/Training Program in New York, NY

Active since April 03, 2025
1275 YORK AVENUE, BOX 435, NEW YORK, NY 10065(212) 639-7537(416) 480-4225 Get Directions Write a Review

NPPES record last updated: August 27, 2025. Verified against the NPPES registry weekly; last sync: July 19, 2026.

About Alexander Tomas Adler Gregor Md NPPES

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

ALEXANDER TOMAS ADLER GREGOR MD (NPI 1881498152) is an individual student in an organized health care education/training program in New York, New York, licensed in New York (339018) and active in the NPI registry since April 2025.

NPPES Registry Identity

NPI1881498152
Entity TypeIndividualMale
Primary Taxonomy390200000X
Provider Legal NameALEXANDER TOMAS ADLER GREGORCredential: MD
Location Address1275 YORK AVENUE, BOX 435New York, NY 10065
Mailing Address1275 York Avenue, Box 435New York, NY 10065 · (212) 639-7537
Phone(212) 639-7537
Fax(416) 480-4225
Sole ProprietorNo
Enumeration DateApril 3, 2025
Last NPPES UpdateAugust 27, 2025
NPPES CertifiedAugust 27, 2025
✔ NPI 1881498152 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyStudent in an Organized Health Care Education/Training ProgramStudent, Health Care
Taxonomy Code390200000X
License✔ Licensed in NY · 339018
Definition

An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.

1275 YORK AVENUE, New York, NY 10065
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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ROBERT J YOUNG M.D.
Radiology (Neuroradiology)
1275 YORK AVENUE, MEMORIAL SLOAN-KETTERING CANCER CENTER
NEW YORK, NY 10065
New York County (212) 639-8196
JULIE EWY CPNP
Nurse Practitioner (Pediatrics)
1275 YORK AVENUE, MEMORIAL SLOAN-KETTERING CANCER INSTITUTE, 9TH FLOOR
NEW YORK, NY 10065
New York County (212) 639-7000
DENISE MARGIOTTA NP
Nurse Practitioner (Acute Care)
1275 YORK AVENUE, MEMORIAL SLOAN KETTERING CANCER CENTER M-17
NEW YORK, NY 10065
New York County (212) 639-2852
MS. KAREN FLYNN NP
Registered Nurse (Oncology)
1275 YORK AVENUE, 7TH FLOOR
NY, NY 10065
New York County (212) 639-6920
MRS. MINDY L. JAFFE MINDY JAFFE, PNP
Nurse Practitioner (Pediatrics)
1275 YORK AVENUE
NEW YORK, NY 10065
New York County (917) 488-8660
DR. VICKY MAKKER MD
Internal Medicine (Hematology & Oncology)
1275 YORK AVENUE
NEW YORK, NY 10065
New York County (212) 639-8596
DR. TRAVIS JASON HOLLMANN M.D., PH.D.
Pathology (Dermatopathology)
1275 YORK AVENUE, MEMORIAL HOSPITAL/ DEPT. OF PATHOLOGY
NEW YORK, NY 10065
New York County (212) 639-8134
AMY PEI YUN VATANAPRADIT ACNP
Nurse Practitioner (Acute Care)
1275 YORK AVENUE
NEW YORK, NY 10065
New York County (212) 639-7326

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 Alexander Gregor's NPI number?

The NPI number for Alexander Gregor is 1881498152. It was assigned to this individual provider in the NPPES registry on April 3, 2025.

Where is Alexander Gregor located?

Alexander Gregor practices at 1275 York Avenue Box 435, New York, NY 10065. The listed phone number is (212) 639-7537.

What is Alexander Gregor's specialty?

The primary specialty registered for this NPI is Student in an Organized Health Care Education/Training Program with taxonomy code 390200000X.

When was this NPI record last updated?

The NPPES record for Alexander Gregor was last updated on August 27, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.