ROBERT GARRISON AMFT #154029
NPI 1639851538
Counselor in Napa, CA
NPI Status: Active since August 01, 2023
Contact Information
1272 HAYES ST
NAPA, CA
ZIP 94559
Phone: (707) 255-0966
- Individual
- Male
- Counselor
About ROBERT GARRISON
This page provides the complete NPI Profile along with additional information for Robert Garrison, a provider established in Napa, California with a medical specialization in Counselor. The healthcare provider is registered in the NPI registry with number 1639851538 assigned on August 2023. The practitioner's primary taxonomy code is 101Y00000X with license number 154029 (CA). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1639851538
- Provider Name
- ROBERT GARRISON AMFT #154029
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 1272 HAYES ST NAPA, CA 94559
- Location Phone
- (707) 255-0966
- Mailing Address
- 1272 HAYES ST NAPA, CA 94559
- Mailing Phone
- (707) 512-5414
- Is Sole Proprietor?
- No
- Enumeration Date
- 08-01-2023
- Last Update Date
- 04-29-2025
- 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
- Taxonomy Code
- 101Y00000X
- Type
- Behavioral Health & Social Service Providers
- License No.
- 154029
- License State
- CA
- Taxonomy Description
- A provider who is trained and educated in the performance of behavior health services through interpersonal communications and analysis. Training and education at the specialty level usually requires a master's degree and clinical experience and supervision for licensure or certification.
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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 1639851538, we treat the final digit (8) 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 72. The final step is to find the difference between that total and the next multiple of ten (80 - 72 = 8).
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 72 is 80. The difference is the calculated check digit.
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Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1639851538, enumerated as an "individual" on August 01, 2023.
The provider is located at 1272 HAYES ST NAPA, CA 94559 and the phone number is (707) 255-0966.
Counselor with taxonomy code 101Y00000X.
