MR. MARK DOUGLAS DUNCAN MHA
NPI 1801809223
Day Training/Habilitation Specialist in Fort Gratiot, MI

NPI Status: Active since August 15, 2006

Contact Information

3847 PINE GROVE AVE STE A
FORT GRATIOT, MI
ZIP 48059
Phone: (810) 966-3717

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

Individual
Male
Day Training/Habilitation Specialist

About MARK DUNCAN

This page provides the complete NPI Profile along with additional information for Mark Duncan, a provider established in Fort Gratiot, Michigan with a medical specialization in Day Training/habilitation Specialist. The healthcare provider is registered in the NPI registry with number 1801809223 assigned on August 2006. The practitioner's primary taxonomy code is 373H00000X. The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI: 1801809223
Provider Name: MR. MARK DOUGLAS DUNCAN MHA
Gender: Male
Entity Type: Individual
Location Address: 3847 PINE GROVE AVE STE A FORT GRATIOT, MI 48059
Location Phone: (810) 966-3717
Mailing Address: 413 16TH ST PORT HURON, MI 48060
Mailing Phone: (810) 966-3717
Is Sole Proprietor?: Yes
Enumeration Date: 08-15-2006
Last Update Date: 07-08-2007
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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: Day Training/Habilitation Specialist
Taxonomy Code: 373H00000X
Type: Nursing Service Related Providers
Taxonomy Description: Individuals experienced or trained in working with developmentally disabled individuals who need assistance in acquiring and maintaining life skills that enable them to cope more effectively with the demands of independent living.

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 1801809223, 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 → 16 → 1 + 6

Pos 6

Unchanged

Pos 7

Doubled → 18 → 1 + 8

Pos 8

Unchanged

Pos 9

Doubled → 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 0 → 0 8 → 16 → 7 9 → 18 → 9 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 0 + 1 + 1 + 6 + 0 + 1 + 8 + 2 + 4 + 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 1801809223.