MARISSA TESSIER
NPI 1194616490
Nutritionist - Nutrition, Education in Morrisonville, NY

NPI Status: Active since July 14, 2025

Contact Information

2155 STATE ROUTE 22B
MORRISONVILLE, NY
ZIP 12962
Phone: (518) 563-8000
Fax: (518) 563-9001

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

Individual
Female
Nutritionist
Nutrition, Education

About MARISSA TESSIER

This page provides the complete NPI Profile along with additional information for Marissa Tessier, a provider established in Morrisonville, New York with a medical specialization in Nutritionist, focusing in nutrition, education . The healthcare provider is registered in the NPI registry with number 1194616490 assigned on July 2025. The practitioner's primary taxonomy code is 133NN1002X. The provider is registered as an individual and her NPI record was last updated one year ago.

NPI: 1194616490
Provider Name: MARISSA TESSIER
Gender: Female
Entity Type: Individual
Location Address: 2155 STATE ROUTE 22B MORRISONVILLE, NY 12962
Location Phone: (518) 563-8000
Location Fax: (518) 563-9001
Mailing Address: 2155 STATE ROUTE 22B MORRISONVILLE, NY 12962
Is Sole Proprietor?: No
Enumeration Date: 07-14-2025
Last Update Date: 07-14-2025
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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: Nutritionist Nutrition, Education
Taxonomy Code: 133NN1002X
Type: Dietary & Nutritional Service Providers

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 1194616490, 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 60. The final step is to find the difference between that total and the next multiple of ten (60 - 60 = 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 → 18 → 1 + 8

Pos 4

Unchanged

Pos 5

Doubled → 12 → 1 + 2

Pos 6

Unchanged

Pos 7

Doubled → 12 → 1 + 2

Pos 8

Unchanged

Pos 9

Doubled → 18 → 1 + 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 9 → 18 → 9 6 → 12 → 3 6 → 12 → 3 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 1 + 8 + 4 + 1 + 2 + 1 + 1 + 2 + 4 + 1 + 8 + 24 = 60

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

The next multiple of ten after 60 is 60. The difference is the calculated check digit.

60 - 60 = 0

This NPI is valid

The calculated check digit is 0, which matches the last digit of 1194616490.