DR. GARY G. BALESTIN PHD, ABPN, LMFT
NPI 1902878366
Psychologist - Intellectual and Developmental Disabilities in South San Francisco, CA
NPI Status: Active since February 01, 2006
Contact Information
1475 HUNTINGTON AVE
SUITE 201
SOUTH SAN FRANCISCO, CA
ZIP 94080
Phone: (650) 588-3808
Fax: (650) 873-5857
- Individual
- Male
- Psychologist
- Intellectual and Developmental Disabilit...
About GARY BALESTIN
This page provides the complete NPI Profile along with additional information for Gary Balestin, a provider established in South San Francisco, California with a medical specialization in Psychologist, focusing in intellectual and developmental disabilities . The healthcare provider is registered in the NPI registry with number 1902878366 assigned on February 2006. The practitioner's primary taxonomy code is 103TM1800X with license number PSY5030 (CA). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1902878366
- Provider Name
- DR. GARY G. BALESTIN PHD, ABPN, LMFT
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 1475 HUNTINGTON AVE SUITE 201 SOUTH SAN FRANCISCO, CA 94080
- Location Phone
- (650) 588-3808
- Location Fax
- (650) 873-5857
- Mailing Address
- 1475 HUNTINGTON AVE SUITE 201 SOUTH SAN FRANCISCO, CA 94080
- Mailing Phone
- (650) 588-3808
- Mailing Fax
- (650) 873-5857
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 02-01-2006
- Last Update Date
- 09-11-2025
- 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 Intellectual and Developmental Disabilities
- Taxonomy Code
- 103TM1800X
- Type
- Behavioral Health & Social Service Providers
- License No.
- PSY5030
- License State
- CA
Secondary Taxonomies
The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.
| No. | Taxonomy Code | Type | Classification / Specialization |
License No. (State) |
|---|---|---|---|---|
| 1 | 103G00000X | Behavioral Health & Social Service Providers | Clinical Neuropsychologist | PSY5030 (CA) |
| 2 | 103TC0700X | Behavioral Health & Social Service Providers | Psychologist | PSY5030 (CA) |
| 3 | 103TC2200X | Behavioral Health & Social Service Providers | Psychologist | PSY5030 (CA) |
| 4 | 103TF0200X | Behavioral Health & Social Service Providers | Psychologist | PSY5030 (CA) |
| 5 | 103TR0400X | Behavioral Health & Social Service Providers | Psychologist | PSY5030 (CA) |
| 6 | 106H00000X | Behavioral Health & Social Service Providers | Marriage & Family Therapist | LMFT6806 (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 1902878366, we treat the final digit (6) 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 64. The final step is to find the difference between that total and the next multiple of ten (70 - 64 = 6).
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 64 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 13 providers are registered at the same or a nearby location.
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1902878366, enumerated as an "individual" on February 01, 2006.
The provider is located at 1475 HUNTINGTON AVE SUITE 201 SOUTH SAN FRANCISCO, CA 94080 and the phone number is (650) 588-3808.
Psychologist with taxonomy code 103TM1800X and a focus in Intellectual and Developmental Disabilities.
