GRETE JOAN LETSON MA, LPC
NPI 1093972085
Counselor in Livonia, MI

NPI Status: Active since May 19, 2008

Contact Information

17250 FARMINGTON RD
LIVONIA, MI
ZIP 48152
Phone: (734) 425-4070
Fax: (734) 425-8350

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

Individual
Female
Counselor

About GRETE LETSON

This page provides the complete NPI Profile along with additional information for Grete Letson, a provider established in Livonia, Michigan with a medical specialization in Counselor. The healthcare provider is registered in the NPI registry with number 1093972085 assigned on May 2008. The practitioner's primary taxonomy code is 101Y00000X with license number 6401010558 (MI). The provider is registered as an individual and her NPI record was last updated 18 years ago.

NPI: 1093972085
Provider Name: GRETE JOAN LETSON MA, LPC
Other Name: GRETE HOYER
Other Name Type: Former Name (1)
Gender: Female
Entity Type: Individual
Location Address: 17250 FARMINGTON RD LIVONIA, MI 48152
Location Phone: (734) 425-4070
Location Fax: (734) 425-8350
Mailing Address: 28000 DEQUINDRE RD WARREN, MI 48092
Mailing Phone: (586) 753-0405
Mailing Fax: (734) 425-8350
Is Sole Proprietor?: No
Enumeration Date: 05-19-2008
Last Update Date: 05-19-2008
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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: Counselor
Taxonomy Code: 101Y00000X
Type: Behavioral Health & Social Service Providers
License No.: 6401010558
License State: MI
Taxonomy Description: A provider who is trained and educated in the performance of behavior health services through interpersonal communications and analysis. Training and education at the specialty level usually requires a master's degree and clinical experience and supervision for licensure or certification.

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 1093972085, we treat the final digit (5) 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 65. The final step is to find the difference between that total and the next multiple of ten (70 - 65 = 5).

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 → 18 → 1 + 8

Pos 4

Unchanged

Pos 5

Doubled → 18 → 1 + 8

Pos 6

Unchanged

Pos 7

Doubled → 4

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

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 1 + 8 + 3 + 1 + 8 + 7 + 4 + 0 + 1 + 6 + 24 = 65

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

The next multiple of ten after 65 is 70. The difference is the calculated check digit.

70 - 65 = 5

This NPI is valid

The calculated check digit is 5, which matches the last digit of 1093972085.