MICHAEL VERDONK
NPI 1881313112
Counselor - Mental Health in Tukwila, WA
NPI Status: Active since August 22, 2022
Contact Information
15455 65TH AVE S
TUKWILA, WA
ZIP 98188
Phone: (206) 721-5170
Fax: (360) 353-9440
- Individual
- Male
- Counselor
- Mental Health
About MICHAEL VERDONK
This page provides the complete NPI Profile along with additional information for Michael Verdonk, a provider established in Tukwila, Washington with a medical specialization in Counselor, focusing in mental health . The healthcare provider is registered in the NPI registry with number 1881313112 assigned on August 2022. The practitioner's primary taxonomy code is 101YM0800X with license number MC61480939 (WA). The provider is registered as an individual and his NPI record was last updated May 2026.
- NPI
- 1881313112
- Provider Name
- MICHAEL VERDONK
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 15455 65TH AVE S TUKWILA, WA 98188
- Location Phone
- (206) 721-5170
- Location Fax
- (360) 353-9440
- Mailing Address
- PO BOX 2429 LONGVIEW, WA 98632
- Mailing Phone
- (360) 353-9494
- Mailing Fax
- (360) 353-9440
- Is Sole Proprietor?
- No
- Enumeration Date
- 08-22-2022
- Last Update Date
- 05-05-2026
- Code Navigator
A mental health counselor like Michael Verdonk provides treatment to individuals, families, couples, and groups for mental and emotional health issues and relationship problems. Mental health counselors treat clients with a variety of conditions, including anxiety, depression, grief, low self-esteem, stress, and suicidal impulses.
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
Counselor Mental Health
- Taxonomy Code
- 101YM0800X
- Type
- Behavioral Health & Social Service Providers
- License No.
- MC61480939
- License State
- WA
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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 1881313112, 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.
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.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
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.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
TUKWILA, WA 98188
TUKWILA, WA 98188
TUKWILA, WA 98188
TUKWILA, WA 98188
TUKWILA, WA 98188
TUKWILA, WA 98188
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1881313112, enumerated as an "individual" on August 22, 2022.
The provider is located at 15455 65TH AVE S TUKWILA, WA 98188 and the phone number is (206) 721-5170.
Counselor with taxonomy code 101YM0800X and a focus in Mental Health.
