DR. DONALD DAVIDSON MATTHEWS PSYD
NPI 1659171874
Psychologist - Cognitive & Behavioral in Cathedral City, CA
NPI Status: Active since March 17, 2025
Contact Information
68657 CALLE MANCHA
CATHEDRAL CITY, CA
ZIP 92234
Phone: (707) 342-1300
- Individual
- Male
- Psychologist
- Cognitive & Behavioral
About DONALD MATTHEWS
This page provides the complete NPI Profile along with additional information for Donald Matthews, a provider established in Cathedral City, California with a medical specialization in Psychologist, focusing in cognitive & behavioral . The healthcare provider is registered in the NPI registry with number 1659171874 assigned on March 2025. The practitioner's primary taxonomy code is 103TB0200X. The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1659171874
- Provider Name
- DR. DONALD DAVIDSON MATTHEWS PSYD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 68657 CALLE MANCHA CATHEDRAL CITY, CA 92234
- Location Phone
- (707) 342-1300
- Mailing Address
- 68657 CALLE MANCHA CATHEDRAL CITY, CA 92234
- Mailing Phone
- (707) 342-1300
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 03-17-2025
- Last Update Date
- 03-17-2025
- 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
Psychologist Cognitive & Behavioral
- Taxonomy Code
- 103TB0200X
- Type
- Behavioral Health & Social Service Providers
- Taxonomy Description
- A psychologist who reflects an experimental-clinical approach distinguished by use of principles of human learning and development and theories of cognitive processing to promote meaningful change in maladaptive human behavior and thinking.
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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 1659171874, 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 66. The final step is to find the difference between that total and the next multiple of ten (70 - 66 = 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 66 is 70. The difference is the calculated check digit.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1659171874, enumerated as an "individual" on March 17, 2025.
The provider is located at 68657 CALLE MANCHA CATHEDRAL CITY, CA 92234 and the phone number is (707) 342-1300.
Psychologist with taxonomy code 103TB0200X and a focus in Cognitive & Behavioral.
