MATTHEW YUEN DDS
NPI 1023937034
Dentist - General Practice in Castro Valley, CA
NPI Status: Active since July 13, 2026
Contact Information
20995 REDWOOD RD
CASTRO VALLEY, CA
ZIP 94546
Phone: (510) 872-1326
This NPI profile has been added to the NPI registry within the last 30 days.
NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.
- Organization
- Dentist
- General Practice
About MATTHEW YUEN DDS
This page provides the complete NPI Profile along with additional information for Matthew Yuen Dds, a provider established in Castro Valley, California operating as a Dentist, focusing in general practice . The healthcare provider is registered in the NPI registry with number 1023937034 assigned on July 2026. The practitioner's primary taxonomy code is 1223G0001X. The provider is registered as an organization and their NPI record was last updated July 2026. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization. The authorized official of this NPI record is Matthew Yuen Dds (Dentist)
- NPI
- 1023937034
- Provider Name
- MATTHEW YUEN DDS
- Entity Type
- Organization
- Location Address
- 20995 REDWOOD RD CASTRO VALLEY, CA 94546
- Location Phone
- (510) 872-1326
- Mailing Address
- 20995 REDWOOD RD CASTRO VALLEY, CA 94546
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 07-13-2026
- Last Update Date
- 07-13-2026
- Code Navigator
A dentist like Matthew Yuen Dds is a skilled in and licensed provider that diagnoses and treats problems with patients teeth, gums, and related parts of the mouth. Dentists educate patients on how to take care of the teeth and gums and provide information on diet choices that affect oral health. Dentists must be licensed in the state in which they work.
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
Dentist General Practice
- Taxonomy Code
- 1223G0001X
- Type
- Dental Providers
- Taxonomy Description
- A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.
Group Taxonomy 193400000X SINGLE SPECIALTY GROUP
This provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.
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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 1023937034, 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 3 providers are registered at the same or a nearby location.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1023937034, enumerated as an "organization" on July 13, 2026.
The provider is located at 20995 REDWOOD RD CASTRO VALLEY, CA 94546 and the phone number is (510) 872-1326.
Dentist with taxonomy code 1223G0001X and a focus in General Practice.
