MR. JOHN ROBERT MARTIGNETTI
NPI 1902760283
Peer Specialist in St Johnsbury, VT

NPI Status: Active since December 11, 2025

Contact Information

2225 PORTLAND ST
ST JOHNSBURY, VT
ZIP 05819
Phone: (802) 748-3181
Fax: (802) 748-0704

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

Individual
Male
Peer Specialist

About JOHN MARTIGNETTI

This page provides the complete NPI Profile along with additional information for John Martignetti, a provider established in St Johnsbury, Vermont with a medical specialization in Peer Specialist. The healthcare provider is registered in the NPI registry with number 1902760283 assigned on December 2025. The practitioner's primary taxonomy code is 175T00000X with license number S94 (VT). The provider is registered as an individual and his NPI record was last updated one year ago. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization.

NPI: 1902760283
Provider Name: MR. JOHN ROBERT MARTIGNETTI
Gender: Male
Entity Type: Individual
Location Address: 2225 PORTLAND ST ST JOHNSBURY, VT 05819
Location Phone: (802) 748-3181
Location Fax: (802) 748-0704
Mailing Address: 2225 PORTLAND ST ST JOHNSBURY, VT 05819
Mailing Phone: (802) 748-3181
Mailing Fax: (802) 748-0704
Is Sole Proprietor?: Yes
Enumeration Date: 12-11-2025
Last Update Date: 12-11-2025
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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: Peer Specialist
Taxonomy Code: 175T00000X
Type: Other Service Providers
License No.: S94
License State: VT
Taxonomy Description: Individuals certified to perform peer support services through a training process defined by a government agency, such as the Department of Veterans Affairs or a state mental health department/certification/licensing authority.

Group Taxonomy 193400000X SINGLE SPECIALTY GROUP

This provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.

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 1902760283, we treat the final digit (3) 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 57. The final step is to find the difference between that total and the next multiple of ten (60 - 57 = 3).

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 → 0

Pos 4

Unchanged

Pos 5

Doubled → 14 → 1 + 4

Pos 6

Unchanged

Pos 7

Doubled → 0

Pos 8

Unchanged

Pos 9

Doubled → 16 → 1 + 6

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 0 → 0 7 → 14 → 5 0 → 0 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 9 + 0 + 2 + 1 + 4 + 6 + 0 + 2 + 1 + 6 + 24 = 57

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

The next multiple of ten after 57 is 60. The difference is the calculated check digit.

60 - 57 = 3

This NPI is valid

The calculated check digit is 3, which matches the last digit of 1902760283.