DR. ROB M GRELLMAN LMFT, PSYD
NPI 1023675626
Counselor - Professional in San Jose, CA
NPI Status: Active since May 20, 2019
Contact Information
3880 S BASCOM AVE STE 212
SAN JOSE, CA
ZIP 95124
Phone: (408) 486-6711
- Individual
- Male
- Counselor
- Professional
About ROB GRELLMAN
This page provides the complete NPI Profile along with additional information for Rob Grellman, a provider established in San Jose, California with a medical specialization in Counselor, focusing in professional . The healthcare provider is registered in the NPI registry with number 1023675626 assigned on May 2019. The practitioner's primary taxonomy code is 101YP2500X with license number LMFT36930 (CA). The provider is registered as an individual and his NPI record was last updated one year ago. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization.
- NPI
- 1023675626
- Provider Name
- DR. ROB M GRELLMAN LMFT, PSYD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 3880 S BASCOM AVE STE 212 SAN JOSE, CA 95124
- Location Phone
- (408) 486-6711
- Mailing Address
- 3880 S BASCOM AVE STE 212 SAN JOSE, CA 95124
- Mailing Phone
- (408) 486-6711
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 05-20-2019
- Last Update Date
- 11-07-2025
- 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 Professional
- Taxonomy Code
- 101YP2500X
- Type
- Behavioral Health & Social Service Providers
- License No.
- LMFT36930
- License State
- CA
Group Taxonomy 193400000X MULTIPLE 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 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 1023675626, 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 54. The final step is to find the difference between that total and the next multiple of ten (60 - 54 = 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 54 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.
SAN JOSE, CA 95124
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1023675626, enumerated as an "individual" on May 20, 2019.
The provider is located at 3880 S BASCOM AVE STE 212 SAN JOSE, CA 95124 and the phone number is (408) 486-6711.
Counselor with taxonomy code 101YP2500X and a focus in Professional.
