MAXIMILLIAN PHILLIP GANZ DO
NPI 1144859240
Orthopaedic Surgery - Adult Reconstructive Orthopaedic Surgery in Merrick, NY

NPI Status: Active since April 02, 2020

Contact Information

1728 SUNRISE HWY
MERRICK, NY
ZIP 11566
Phone: (516) 279-3352

NPI Profile Information
Primary Taxonomy
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Orthopaedic Surgery
Adult Reconstructive Orthopaedic Surgery

About MAXIMILLIAN GANZ

This page provides the complete NPI Profile along with additional information for Maximillian Ganz, a provider established in Merrick, New York with a medical specialization in Orthopaedic Surgery, focusing in adult reconstructive orthopaedic surgery . The healthcare provider is registered in the NPI registry with number 1144859240 assigned on April 2020. The practitioner's primary taxonomy code is 207XS0114X with license number 337988 (NY). The provider is registered as an individual and his NPI record was last updated January 2026.

NPI: 1144859240
Provider Name: MAXIMILLIAN PHILLIP GANZ DO
Gender: Male
Entity Type: Individual
Location Address: 1728 SUNRISE HWY MERRICK, NY 11566
Location Phone: (516) 279-3352
Mailing Address: 1728 SUNRISE HWY MERRICK, NY 11566
Is Sole Proprietor?: No
Enumeration Date: 04-02-2020
Last Update Date: 01-30-2026
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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: Orthopaedic Surgery Adult Reconstructive Orthopaedic Surgery
Taxonomy Code: 207XS0114X
Type: Allopathic & Osteopathic Physicians
License No.: 337988
License State: NY
Taxonomy Description: Recognized by several state medical boards as a fellowship subspecialty program of orthopaedic surgery, adult reconstructive orthopaedic surgeons deal with reconstructive procedures such as joint arthroplasty (i.e., hip and knee), osteotomy, arthroscopy, soft-tissue reconstruction, and a variety of other adult reconstructive surgical procedures.

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 1144859240, we treat the final digit (0) 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 70. The final step is to find the difference between that total and the next multiple of ten (70 - 70 = 0).

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.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 8

Pos 4

Unchanged

Pos 5

Doubled → 16 → 1 + 6

Pos 6

Unchanged

Pos 7

Doubled → 18 → 1 + 8

Pos 8

Unchanged

Pos 9

Doubled → 8

Check

Target digit

Regular digit Doubled digit Check digit

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.

1 → 2 4 → 8 8 → 16 → 7 9 → 18 → 9 4 → 8

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 1 + 8 + 4 + 1 + 6 + 5 + 1 + 8 + 2 + 8 + 24 = 70

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 70 is 70. The difference is the calculated check digit.

70 - 70 = 0

This NPI is valid

The calculated check digit is 0, which matches the last digit of 1144859240.