THANH KIEN TRUONG O.D.
NPI 1669528089
Optometrist - Low Vision Rehabilitation in San Francisco, CA
NPI Status: Active since January 26, 2007
Contact Information
3443 BALBOA ST STE B
SAN FRANCISCO, CA
ZIP 94121
Phone: (415) 221-4733
Fax: (415) 221-4733
- Individual
- Male
- Optometrist
- Low Vision Rehabilitation
About THANH TRUONG
This page provides the complete NPI Profile along with additional information for Thanh Truong, a provider established in San Francisco, California with a medical specialization in Optometrist, focusing in low vision rehabilitation . The healthcare provider is registered in the NPI registry with number 1669528089 assigned on January 2007. The practitioner's primary taxonomy code is 152WL0500X with license number 12067T (CA). The provider is registered as an individual and his NPI record was last updated 19 years ago.
- NPI
- 1669528089
- Provider Name
- THANH KIEN TRUONG O.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 3443 BALBOA ST STE B SAN FRANCISCO, CA 94121
- Location Phone
- (415) 221-4733
- Location Fax
- (415) 221-4733
- Mailing Address
- PO BOX 4067 NAPA, CA 94558
- Mailing Phone
- (707) 258-4737
- Mailing Fax
- (415) 221-4733
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 01-26-2007
- 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
Optometrist Low Vision Rehabilitation
- Taxonomy Code
- 152WL0500X
- Type
- Eye and Vision Services Providers
- License No.
- 12067T
- License State
- CA
- Taxonomy Description
- Optometrists who specialize in low-vision care having training to assess visual function, prescribe low-vision devices, develop treatment plans, and recommend other vision rehabilitation services.
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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 1669528089, we treat the final digit (9) 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 61. The final step is to find the difference between that total and the next multiple of ten (70 - 61 = 9).
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 61 is 70. The difference is the calculated check digit.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1669528089, enumerated as an "individual" on January 26, 2007.
The provider is located at 3443 BALBOA ST STE B SAN FRANCISCO, CA 94121 and the phone number is (415) 221-4733.
Optometrist with taxonomy code 152WL0500X and a focus in Low Vision Rehabilitation.
