TOMMY VAN NGUYEN
NPI 1558280065
Contractor in San Francisco, CA
NPI Status: Active since July 10, 2026
Contact Information
1171 MISSION ST
SAN FRANCISCO, CA
ZIP 94103
Phone: (510) 931-8876
This NPI profile has been added to the NPI registry within the last 30 days.
- Individual
- Male
- Contractor
About TOMMY NGUYEN
This page provides the complete NPI Profile along with additional information for Tommy Nguyen, a provider established in San Francisco, California with a medical specialization in Contractor. The healthcare provider is registered in the NPI registry with number 1558280065 assigned on July 2026. The practitioner's primary taxonomy code is 171W00000X. The provider is registered as an individual and his NPI record was last updated July 2026.
- NPI
- 1558280065
- Provider Name
- TOMMY VAN NGUYEN
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 1171 MISSION ST SAN FRANCISCO, CA 94103
- Location Phone
- (510) 931-8876
- Mailing Address
- 157 WOODRIDGE DR VALLEJO, CA 94591
- Is Sole Proprietor?
- No
- Enumeration Date
- 07-10-2026
- Last Update Date
- 07-10-2026
- 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
Contractor
- Taxonomy Code
- 171W00000X
- Type
- Other Service Providers
- Taxonomy Description
- For the purposes of the Health Care Provider Taxonomy, a contractor is limited to individuals who do construction or mechanical work to modify a patient's environment to accommodate a health condition. Contractors perform projects including, but not limited to, building wheelchair ramps, widening doorways, modifying personal vehicles, and making other improvements for patient access and movement. This code has no relation to a provider's employment status.
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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 1558280065, we treat the final digit (5) 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 55. The final step is to find the difference between that total and the next multiple of ten (60 - 55 = 5).
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 55 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 16 providers are registered at the same or a nearby location.
SAN FRANCISCO, CA 94103
SAN FRANCISCO, CA 94103
SAN FRANCISCO, CA 94103
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1558280065, enumerated as an "individual" on July 10, 2026.
The provider is located at 1171 MISSION ST SAN FRANCISCO, CA 94103 and the phone number is (510) 931-8876.
Contractor with taxonomy code 171W00000X.
