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M. WEISSFELNER
NPI 1457442261
Internal Medicine in New York, NY

Active since September 27, 2006
423 E 23RD ST, NEW YORK, NY 10010(212) 686-7500 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About M. Weissfelner NPPES

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

M. WEISSFELNER (NPI 1457442261) is an individual internal medicine provider in New York, New York, licensed in New York (181801) and active in the NPI registry since September 2006.

NPPES Registry Identity

NPI1457442261
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameM. WEISSFELNER
Location Address423 E 23RD STNew York, NY 10010-5011
Mailing Address423 E 23rd StNew York, NY 10010-5011
Phone(212) 686-7500
Sole ProprietorNo
Enumeration DateSeptember 27, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1457442261 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 · 181801
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.
423 E 23RD ST, New York, NY 10010
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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. JASON H EPSTEIN MD
Anesthesiology (Pain Medicine)
423 E 23RD ST
NEW YORK, NY 10010
New York County (212) 686-7500
MR. GREG DATILES GONZALES RRT-NPS, RPFT, AEC
Respiratory Therapist, Registered (Critical Care)
423 E 23RD ST, RESPIRATORY CARE SERVICES ROOM 13095S
NEW YORK, NY 10010
New York County (212) 686-7500
DR. LAMONT JORDAN BARLOW
Urology
423 E 23RD ST
NEW YORK, NY 10010
New York County (212) 686-7500
MRS. PASCALE FILS-AIME RRT
Respiratory Therapist, Registered (General Care)
423 E 23RD ST, RESPIRATORY CARE RM 13090S
NEW YORK, NY 10010
New York County (212) 686-7500
MS. COURTNEY DUNN LCSW
Social Worker (Clinical)
423 E 23RD ST
NEW YORK, NY 10010
New York County (212) 686-7500
DR. PATRICK COLIN MALLOY M.D.
Radiology (Vascular & Interventional Radiology)
423 E 23RD ST, RADIOLOGY SERVICE
NEW YORK, NY 10010
New York County (212) 686-7500
CARLA ASSENZA LMSW
Social Worker
423 E 23RD ST
NEW YORK, NY 10010
New York County (212) 686-7500
CARA MARY OCHSENREITER LMSW
Social Worker
423 E 23RD ST
NEW YORK, NY 10010
New York County (347) 216-5546

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 M. Weissfelner's NPI number?

The NPI number for M. Weissfelner is 1457442261. It was assigned to this individual provider in the NPPES registry on September 27, 2006.

Where is M. Weissfelner located?

M. Weissfelner practices at 423 E 23rd St, New York, NY 10010. The listed phone number is (212) 686-7500.

What is M. Weissfelner'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 M. Weissfelner was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.