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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

HEIDI S FLAGG MD
NPI 1053309641
Obstetrics & Gynecology in New York, NY

Active since October 09, 2005
135 SPRING ST, 2ND FL, NEW YORK, NY 10012(212) 219-1187(212) 219-1538 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Heidi S Flagg Md NPPES

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

HEIDI S FLAGG MD (NPI 1053309641) is an individual obstetrics & gynecology provider in New York, New York, licensed in New York (213720) and active in the NPI registry since October 2005.

NPPES Registry Identity

NPI1053309641
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameHEIDI S FLAGGCredential: MD
Location Address135 SPRING ST, 2ND FLNew York, NY 10012-3858
Mailing AddressPo Box 2003East Syracuse, NY 13057-4503 · (315) 446-3904 · Fax (315) 445-2936
Phone(212) 219-1187
Fax(212) 219-1538
Sole ProprietorNo
Enumeration DateOctober 9, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1053309641 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in NY · 213720
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
135 SPRING ST, New York, NY 10012
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Other Names 1

Former Name (1)Heidi Snyder

Other Providers at the Same Location NPPES 7

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

SPRING OBGYN PC
Obstetrics & Gynecology
135 SPRING ST, 2ND FLOOR
NEW YORK, NY 10012
New York County (212) 219-1187
BONNIE YIM CNM
Advanced Practice Midwife
135 SPRING ST, 2ND FL
NEW YORK, NY 10012
New York County (212) 219-1187
DR. LINDA M. CHO M.D
Obstetrics & Gynecology
135 SPRING ST, 2ND FLOOR
NEW YORK, NY 10012
New York County (212) 219-1187
DR. LYDIA BECK ALEXANDER M.D.
Obstetrics & Gynecology
135 SPRING ST
NEW YORK, NY 10012
New York County (212) 219-1187
BRINA A MALDONADO MD
Obstetrics & Gynecology
135 SPRING ST, 2ND FL
NEW YORK, NY 10012
New York County (212) 219-1187
DEBORAH A GAHR MD
Obstetrics & Gynecology
135 SPRING ST, 2ND FL
NEW YORK, NY 10012
New York County (212) 219-1187
DR. ELIZABETH BAILEY RODGERS MD
Obstetrics & Gynecology
135 SPRING ST, 201 W
NEW YORK, NY 10012
New York County (212) 219-1187

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 Heidi Flagg's NPI number?

The NPI number for Heidi Flagg is 1053309641. It was assigned to this individual provider in the NPPES registry on October 9, 2005. The provider is also known as Heidi Snyder.

Where is Heidi Flagg located?

Heidi Flagg practices at 135 Spring St 2nd Fl, New York, NY 10012. The listed phone number is (212) 219-1187.

What is Heidi Flagg's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

When was this NPI record last updated?

The NPPES record for Heidi Flagg was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 30 days 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.