MICHAEL RALPH CHAVARRIA JR. MA W/PPS CREDENTIAL
NPI 1821803107
Counselor - School in Dublin, CA
NPI Status: Active since February 12, 2025
Contact Information
3601 KOHNEN WAY
DUBLIN, CA
ZIP 94568
Phone: (925) 875-9376
- Individual
- Male
- Counselor
- School
About MICHAEL CHAVARRIA
This page provides the complete NPI Profile along with additional information for Michael Chavarria, a provider established in Dublin, California with a medical specialization in Counselor, focusing in school . The healthcare provider is registered in the NPI registry with number 1821803107 assigned on February 2025. The practitioner's primary taxonomy code is 101YS0200X with license number 240229854 (CA). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1821803107
- Provider Name
- MICHAEL RALPH CHAVARRIA JR. MA W/PPS CREDENTIAL
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 3601 KOHNEN WAY DUBLIN, CA 94568
- Location Phone
- (925) 875-9376
- Mailing Address
- 1663 N RIPON RD UNIT 301 RIPON, CA 95366
- Mailing Phone
- (209) 675-3880
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 02-12-2025
- Last Update Date
- 02-12-2025
- 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
Counselor School
- Taxonomy Code
- 101YS0200X
- Type
- Behavioral Health & Social Service Providers
- License No.
- 240229854
- License State
- CA
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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 1821803107, we treat the final digit (7) 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 53. The final step is to find the difference between that total and the next multiple of ten (60 - 53 = 7).
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 53 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 2 providers are registered at the same or a nearby location.
DUBLIN, CA 94568
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1821803107, enumerated as an "individual" on February 12, 2025.
The provider is located at 3601 KOHNEN WAY DUBLIN, CA 94568 and the phone number is (925) 875-9376.
Counselor with taxonomy code 101YS0200X and a focus in School.
