MATTHEW GARETT DEXHEIMER LPC, LMHC
NPI 1023415544
Counselor - Professional in Portland, OR
NPI Status: Active since November 26, 2014
Contact Information
8425 N LOMBARD ST
PORTLAND, OR
ZIP 97203
Phone: (503) 283-4776
- Individual
- Male
- Counselor
- Professional
About MATTHEW DEXHEIMER
This page provides the complete NPI Profile along with additional information for Matthew Dexheimer, a provider established in Portland, Oregon with a medical specialization in Counselor, focusing in professional . The healthcare provider is registered in the NPI registry with number 1023415544 assigned on November 2014. The practitioner's primary taxonomy code is 101YP2500X with license number C6913 (OR). The provider is registered as an individual and his NPI record was last updated April 2026.
- NPI
- 1023415544
- Provider Name
- MATTHEW GARETT DEXHEIMER LPC, LMHC
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 8425 N LOMBARD ST PORTLAND, OR 97203
- Location Phone
- (503) 283-4776
- Mailing Address
- 8425 N LOMBARD ST PORTLAND, OR 97203
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 11-26-2014
- Last Update Date
- 04-07-2026
- Code Navigator
Location Map
Secondary Locations
- 3500 NE M L King Blvd Ste 200
Portland, OR 97212
(503) 327-8205 - 7507 NE 51st St
Vancouver, WA 98662
(360) 906-1190
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 Professional
- Taxonomy Code
- 101YP2500X
- Type
- Behavioral Health & Social Service Providers
- License No.
- C6913
- License State
- OR
Secondary Taxonomies
The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.
| No. | Taxonomy Code | Type | Classification / Specialization |
License No. (State) |
|---|---|---|---|---|
| 1 | 101YM0800X | Behavioral Health & Social Service Providers | Counselor | MHC.LH.70068189 (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 1023415544, we treat the final digit (4) 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 56. The final step is to find the difference between that total and the next multiple of ten (60 - 56 = 4).
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 56 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 9 providers are registered at the same or a nearby location.
PORTLAND, OR 97203
PORTLAND, OR 97203
PORTLAND, OR 97203
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1023415544, enumerated as an "individual" on November 26, 2014.
The provider is located at 8425 N LOMBARD ST PORTLAND, OR 97203 and the phone number is (503) 283-4776.
Counselor with taxonomy code 101YP2500X and a focus in Professional.
