SERGEI KALSOW MD PC
NPI 1437081601
Surgery - Plastic and Reconstructive Surgery in New York, NY
NPI Status: Active since June 02, 2026
Contact Information
635 MADISON AVE FL 17
NEW YORK, NY
ZIP 10022
Phone: (212) 653-8726
Fax: (212) 653-8726
This NPI profile has been added to the NPI registry within the last 30 days.
- Organization
- Surgery
- Plastic and Reconstructive Surgery
About SERGEI KALSOW MD PC
This page provides the complete NPI Profile along with additional information for Sergei Kalsow Md Pc, a provider established in New York, New York operating as a Surgery, focusing in plastic and reconstructive surgery . The healthcare provider is registered in the NPI registry with number 1437081601 assigned on June 2026. The practitioner's primary taxonomy code is 2086S0122X. The provider is registered as an organization and their NPI record was last updated June 2026. Sergei Kalsow Md Pc operates as a Multi-Specialty Group with one or more individual practitioners, who practice different areas of specialization. The authorized official of this NPI record is Sergei Kalsow Md (Owner)
- NPI
- 1437081601
- Provider Name
- SERGEI KALSOW MD PC
- Entity Type
- Organization
- Location Address
- 635 MADISON AVE FL 17 NEW YORK, NY 10022
- Location Phone
- (212) 653-8726
- Location Fax
- (212) 653-8726
- Mailing Address
- 635 MADISON AVE FL 17 NEW YORK, NY 10022
- Mailing Phone
- (212) 653-8726
- Mailing Fax
- (212) 653-8726
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 06-02-2026
- Last Update Date
- 06-02-2026
- Code Navigator
Location Map
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Surgery Plastic and Reconstructive Surgery
- Taxonomy Code
- 2086S0122X
- Type
- Allopathic & Osteopathic Physicians
- Taxonomy Description
- A surgeon who specializes in plastic and reconstructive surgery.
Group Taxonomy 193200000X MULTI-SPECIALTY GROUP
This provider is a business group of one or more individual practitioners, who practice with different areas of specialization.
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NPI NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1437081601, we treat the final digit (1) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 59. The final step is to find the difference between that total and the next multiple of ten (60 - 59 = 1).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 59 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 4 providers are registered at the same or a nearby location.
NEW YORK, NY 10022
NEW YORK, NY 10022
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1437081601, enumerated as an "organization" on June 02, 2026.
The provider is located at 635 MADISON AVE FL 17 NEW YORK, NY 10022 and the phone number is (212) 653-8726.
Surgery with taxonomy code 2086S0122X and a focus in Plastic and Reconstructive Surgery.
