JOHN VISSER MD
NPI 1255388062
Psychiatry & Neurology - Neurology in Grand Rapids, MI

NPI Status: Active since May 27, 2006

Contact Information

2750 E BELTLINE AVE NE FL 3
GRAND RAPIDS, MI
ZIP 49525
Phone: (616) 267-7104

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

Individual
Male
Psychiatry & Neurology
Neurology

About JOHN VISSER

This page provides the complete NPI Profile along with additional information for John Visser, a provider established in Grand Rapids, Michigan with a medical specialization in Psychiatry & Neurology, focusing in neurology . The healthcare provider is registered in the NPI registry with number 1255388062 assigned on May 2006. The practitioner's primary taxonomy code is 2084N0400X with license number 4301036246 (MI). The provider is registered as an individual and his NPI record was last updated 4 years ago.

NPI: 1255388062
Provider Name: JOHN VISSER MD
Gender: Male
Entity Type: Individual
Location Address: 2750 E BELTLINE AVE NE FL 3 GRAND RAPIDS, MI 49525
Location Phone: (616) 267-7104
Mailing Address: 100 MICHIGAN ST NE MC 845 GRAND RAPIDS, MI 49503
Is Sole Proprietor?: No
Enumeration Date: 05-27-2006
Last Update Date: 07-07-2022
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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: Psychiatry & Neurology Neurology
Taxonomy Code: 2084N0400X
Type: Allopathic & Osteopathic Physicians
License No.: 4301036246
License State: MI
Taxonomy Description: A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.

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 1255388062, we treat the final digit (2) 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 58. The final step is to find the difference between that total and the next multiple of ten (60 - 58 = 2).

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 → 10 → 1 + 0

Pos 4

Unchanged

Pos 5

Doubled → 6

Pos 6

Unchanged

Pos 7

Doubled → 16 → 1 + 6

Pos 8

Unchanged

Pos 9

Doubled → 12 → 1 + 2

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 5 → 10 → 1 3 → 6 8 → 16 → 7 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 2 + 1 + 0 + 5 + 6 + 8 + 1 + 6 + 0 + 1 + 2 + 24 = 58

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

The next multiple of ten after 58 is 60. The difference is the calculated check digit.

60 - 58 = 2

This NPI is valid

The calculated check digit is 2, which matches the last digit of 1255388062.