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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 30 days.

NICKOLAS MASSAR
NPI 1417878737
Internal Medicine in New York, NY

Active since July 22, 2026
550 1ST AVE, NEW YORK, NY 10016(929) 455-8216 Get Directions Write a Review

NPPES record added: July 22, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Nickolas Massar NPPES

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

NICKOLAS MASSAR (NPI 1417878737) is an individual internal medicine provider in New York, New York, licensed in New York (433698) and active in the NPI registry since July 2026.

NPPES Registry Identity

NPI1417878737
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameNICKOLAS MASSAR
Location Address550 1ST AVENew York, NY 10016-6402
Mailing Address550 1st AveNew York, NY 10016-6402 · (929) 455-8216
Phone(929) 455-8216
Sole ProprietorNo
Enumeration DateJuly 22, 2026
NPPES CertifiedJuly 22, 2026
✔ NPI 1417878737 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in NY · 433698
Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

550 1ST AVE, New York, NY 10016
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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.

DR. SHARON URALIL D.O.
Internal Medicine
550 1ST AVE
NEW YORK, NY 10016
New York County (212) 263-3293
DR. DIANA TREVAS FLEISHER
Emergency Medicine (Pediatric Emergency Medicine)
550 1ST AVE
NEW YORK, NY 10016
New York County (212) 263-3293
DR. MONICA GUPTA M.D.
Allergy & Immunology
550 1ST AVE, NBV 16N30, INTERNAL MEDICINE RESIDENCY PROGRAM
NEW YORK, NY 10016
New York County (212) 263-6397
CHRISTINE CHAN M.D.
Student in an Organized Health Care Education/Training Program
550 1ST AVE
NEW YORK, NY 10016
New York County (212) 263-5506
DR. MATTHEW CHIARELLO MD
Radiology (Vascular & Interventional Radiology)
550 1ST AVE
NEW YORK, NY 10016
New York County (212) 263-5506
DR. MEGAN ELIZABETH JENKINS M.D.
Surgery
550 1ST AVE
NEW YORK, NY 10016
New York County (212) 263-7300
DR. MANAN PATEL M.D.
Student in an Organized Health Care Education/Training Program
550 1ST AVE
NEW YORK, NY 10016
New York County (212) 263-5506
VICKY CHIANG
Student in an Organized Health Care Education/Training Program
550 1ST AVE
NEW YORK, NY 10016
New York County (212) 263-5506

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 Nickolas Massar's NPI number?

The NPI number for Nickolas Massar is 1417878737. It was assigned to this individual provider in the NPPES registry on July 22, 2026.

Where is Nickolas Massar located?

Nickolas Massar practices at 550 1st Ave, New York, NY 10016. The listed phone number is (929) 455-8216.

What is Nickolas Massar's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Nickolas Massar was last updated on July 22, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.