CHRISTOPHER MICHELS
NPI 1861949471
Contractor in Grand Rapids, MI

NPI Status: Active since September 01, 2016

Contact Information

625 KENMOOR AVE SE STE 301
GRAND RAPIDS, MI
ZIP 49546
Phone: (800) 793-4720

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

Individual
Male
Contractor

About CHRISTOPHER MICHELS

This page provides the complete NPI Profile along with additional information for Christopher Michels, a provider established in Grand Rapids, Michigan with a medical specialization in Contractor. The healthcare provider is registered in the NPI registry with number 1861949471 assigned on September 2016. The practitioner's primary taxonomy code is 171W00000X with license number E6691H (MI). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI: 1861949471
Provider Name: CHRISTOPHER MICHELS
Gender: Male
Entity Type: Individual
Location Address: 625 KENMOOR AVE SE STE 301 GRAND RAPIDS, MI 49546
Location Phone: (800) 793-4720
Mailing Address: PO BOX 564 HIGGINS LAKE, MI 48627
Mailing Phone: (989) 745-4920
Is Sole Proprietor?: No
Enumeration Date: 09-01-2016
Last Update Date: 11-07-2025
Code Navigator

Location Map

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: Contractor
Taxonomy Code: 171W00000X
Type: Other Service Providers
License No.: E6691H
License State: MI
Taxonomy Description: For the purposes of the Health Care Provider Taxonomy, a contractor is limited to individuals who do construction or mechanical work to modify a patient's environment to accommodate a health condition. Contractors perform projects including, but not limited to, building wheelchair ramps, widening doorways, modifying personal vehicles, and making other improvements for patient access and movement. This code has no relation to a provider's employment status.

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 1861949471, we treat the final digit (1) 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 69. The final step is to find the difference between that total and the next multiple of ten (70 - 69 = 1).

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 → 12 → 1 + 2

Pos 4

Unchanged

Pos 5

Doubled → 18 → 1 + 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 6 → 12 → 3 9 → 18 → 9 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 + 8 + 1 + 2 + 1 + 1 + 8 + 4 + 1 + 8 + 4 + 1 + 4 + 24 = 69

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

The next multiple of ten after 69 is 70. The difference is the calculated check digit.

70 - 69 = 1

This NPI is valid

The calculated check digit is 1, which matches the last digit of 1861949471.