RUSSELL CARL MARKS
NPI 1306971122
Counselor - School in Concord, CA
NPI Status: Active since February 22, 2007
Contact Information
1034 OAK GROVE RD
CONCORD, CA
ZIP 94518
Phone: (925) 603-1900
- Individual
- Male
- Counselor
- School
About RUSSELL MARKS
This page provides the complete NPI Profile along with additional information for Russell Marks, a provider established in Concord, California with a medical specialization in Counselor, focusing in school . The healthcare provider is registered in the NPI registry with number 1306971122 assigned on February 2007. The practitioner's primary taxonomy code is 101YS0200X. The provider is registered as an individual and his NPI record was last updated 19 years ago.
- NPI
- 1306971122
- Provider Name
- RUSSELL CARL MARKS
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 1034 OAK GROVE RD CONCORD, CA 94518
- Location Phone
- (925) 603-1900
- Mailing Address
- 22103 VISTA DEL PLAZA LN APT 14 HAYWARD, CA 94541
- Mailing Phone
- (510) 910-3179
- Is Sole Proprietor?
- No
- Enumeration Date
- 02-22-2007
- Last Update Date
- 07-08-2007
- 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
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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 1306971122, 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.
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Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1306971122, enumerated as an "individual" on February 22, 2007.
The provider is located at 1034 OAK GROVE RD CONCORD, CA 94518 and the phone number is (925) 603-1900.
Counselor with taxonomy code 101YS0200X and a focus in School.
