AMY SIKKENGA MA,, LLP
NPI 1124419973
Psychologist - Intellectual and Developmental Disabilities in Grand Rapids, MI

NPI Status: Active since February 16, 2015

Contact Information

4255 KALAMAZOO AVE SE
GRAND RAPIDS, MI
ZIP 49508
Phone: (616) 455-0960
Fax: (616) 455-7324

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

Individual
Female
Psychologist
Intellectual and Developmental Disabilit...

About AMY SIKKENGA

This page provides the complete NPI Profile along with additional information for Amy Sikkenga, a provider established in Grand Rapids, Michigan with a medical specialization in Psychologist, focusing in intellectual and developmental disabilities . The healthcare provider is registered in the NPI registry with number 1124419973 assigned on February 2015. The practitioner's primary taxonomy code is 103TM1800X with license number 6301007166 (MI). The provider is registered as an individual and her NPI record was last updated 11 years ago.

NPI: 1124419973
Provider Name: AMY SIKKENGA MA,, LLP
Gender: Female
Entity Type: Individual
Location Address: 4255 KALAMAZOO AVE SE GRAND RAPIDS, MI 49508
Location Phone: (616) 455-0960
Location Fax: (616) 455-7324
Mailing Address: PO BOX 68327 GRAND RAPIDS, MI 49516
Mailing Phone: (616) 774-0538
Mailing Fax: (616) 455-7324
Is Sole Proprietor?: No
Enumeration Date: 02-16-2015
Last Update Date: 02-16-2015
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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: Psychologist Intellectual and Developmental Disabilities
Taxonomy Code: 103TM1800X
Type: Behavioral Health & Social Service Providers
License No.: 6301007166
License State: MI

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 1124419973, 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 67. The final step is to find the difference between that total and the next multiple of ten (70 - 67 = 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 → 4

Pos 4

Unchanged

Pos 5

Doubled → 8

Pos 6

Unchanged

Pos 7

Doubled → 18 → 1 + 8

Pos 8

Unchanged

Pos 9

Doubled → 14 → 1 + 4

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 2 → 4 4 → 8 9 → 18 → 9 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 4 + 4 + 8 + 1 + 1 + 8 + 9 + 1 + 4 + 24 = 67

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

The next multiple of ten after 67 is 70. The difference is the calculated check digit.

70 - 67 = 3

This NPI is valid

The calculated check digit is 3, which matches the last digit of 1124419973.