SYDNEY TSENG
NPI 1861921645
Technician, Health Information - Assistant Record Technician in Daly City, CA

NPI Status: Active since June 06, 2017

Contact Information

2 EDGEWOOD CT
DALY CITY, CA
ZIP 94014
Phone: (650) 994-7110

NPI Profile Information
Primary Taxonomy
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Female
Technician, Health Information
Assistant Record Technician

About SYDNEY TSENG

This page provides the complete NPI Profile along with additional information for Sydney Tseng, a provider established in Daly City, California with a medical specialization in Technician, Health Information, focusing in assistant record technician . The healthcare provider is registered in the NPI registry with number 1861921645 assigned on June 2017. The practitioner's primary taxonomy code is 2470A2800X. The provider is registered as an individual and her NPI record was last updated 5 years ago.

NPI: 1861921645
Provider Name: SYDNEY TSENG
Gender: Female
Entity Type: Individual
Location Address: 2 EDGEWOOD CT DALY CITY, CA 94014
Location Phone: (650) 994-7110
Mailing Address: 2 EDGEWOOD CT DALY CITY, CA 94014
Mailing Phone: (650) 994-7110
Is Sole Proprietor?: No
Enumeration Date: 06-06-2017
Last Update Date: 02-10-2021
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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: Technician, Health Information Assistant Record Technician
Taxonomy Code: 2470A2800X
Type: Technologists, Technicians & Other Technical Service Providers

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 1861921645, 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 65. The final step is to find the difference between that total and the next multiple of ten (70 - 65 = 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.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 12 → 1 + 2

Pos 4

Unchanged

Pos 5

Doubled → 18 → 1 + 8

Pos 6

Unchanged

Pos 7

Doubled → 2

Pos 8

Unchanged

Pos 9

Doubled → 8

Check

Target digit

Regular digit Doubled digit Check digit

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.

1 → 2 6 → 12 → 3 9 → 18 → 9 1 → 2 4 → 8

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 8 + 1 + 2 + 1 + 1 + 8 + 2 + 2 + 6 + 8 + 24 = 65

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 65 is 70. The difference is the calculated check digit.

70 - 65 = 5

This NPI is valid

The calculated check digit is 5, which matches the last digit of 1861921645.