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SERGEI KALSOW MD PC
NPI 1437081601
Surgery - Plastic and Reconstructive Surgery in New York, NY

Active since June 02, 2026CLIA 33D2230696 · Waiver
635 MADISON AVE FL 17, NEW YORK, NY 10022(212) 653-8726(212) 653-8726 Get Directions Write a Review

NPPES record last updated: June 2, 2026. Verified against the NPPES registry weekly; last sync: September 13, 2026.

About Sergei Kalsow Md Pc NPPES

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

SERGEI KALSOW MD PC (NPI 1437081601) is a healthcare organization registered as a plastic and reconstructive surgery in New York, New York and active in the NPI registry since June 2026. The organization holds a CLIA Waiver certificate valid through July 26, 2027 and lists Sergei Kalsow, Owner, as its authorized official.

NPPES Registry Identity

NPI1437081601
Entity TypeOrganization
Primary Taxonomy2086S0122X
Legal Business NameSERGEI KALSOW MD PC
Location Address635 MADISON AVE FL 17New York, NY 10022-1009
Mailing Address635 Madison Ave Fl 17New York, NY 10022-1009 · (212) 653-8726 · Fax (212) 653-8726
Phone(212) 653-8726
Fax(212) 653-8726
Organization SubpartNo
Authorized OfficialSergei KalsowOwner · (352) 246-1775
Enumeration DateJune 2, 2026
NPPES CertifiedJune 2, 2026
✔ NPI 1437081601 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgery · Plastic and Reconstructive SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code2086S0122X
Definition
A surgeon who specializes in plastic and reconstructive surgery.
635 MADISON AVE FL 17, New York, NY 10022
Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 33D2230696

Sergei Kalsow MD PC · New York, NY
Active · expires Jul 26, 2027
CLIA Number33D2230696
Laboratory TypePhysician Office
Certificate Effective DateJuly 27, 2025
Certificate Expiration DateJuly 26, 2027
Laboratory DirectorDr. Sergei Kalsow
Laboratory Phone(212) 653-8726
Laboratory LocationSergei Kalsow MD PC635 Madison Ave 17th Floor, New York, NY 10022
CLIA data matches this NPI record on: Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Other Providers at the Same Location NPPES 4

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

DR. KARAN MEHTA M.D.
Plastic Surgery
635 MADISON AVE FL 17
NEW YORK, NY 10022
New York County (929) 294-7706
MR. FRANK LALEZAR MD
Surgery (Plastic and Reconstructive Surgery)
635 MADISON AVE FL 17
NEW YORK, NY 10022
New York County (646) 887-5533
KARAN MEHTA MD PC
Surgery (Plastic and Reconstructive Surgery)
635 MADISON AVE FL 17
NEW YORK, NY 10022
New York County (929) 294-7706
FRANK LALEZAR MD PC
Plastic Surgery (Surgery of the Hand)
635 MADISON AVE FL 17
NEW YORK, NY 10022
New York County (646) 887-5533

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 Sergei Kalsow MD PC's NPI number?

The NPI number for Sergei Kalsow MD PC is 1437081601. It was assigned to this organization in the NPPES registry on June 2, 2026.

Where is Sergei Kalsow MD PC located?

Sergei Kalsow MD PC is located at 635 Madison Ave Fl 17, New York, NY 10022. The listed phone number is (212) 653-8726.

What is Sergei Kalsow MD PC's specialty?

The primary specialty registered for this NPI is Surgery, specializing in Plastic and Reconstructive Surgery, with taxonomy code 2086S0122X.

Does Sergei Kalsow MD PC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 33D2230696) is associated with this NPI, valid through July 26, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Sergei Kalsow MD PC was last updated on June 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.