DEREK STEPHEN CHONG OD
NPI 1164431961
Optometrist in Elmhurst, NY

NPI Status: Active since August 08, 2006

Contact Information

90-01 QUEENS BLVD, 3RD FLOOR
MACYS VISION EXPRESS
ELMHURST, NY
ZIP 11373
Phone: (718) 595-2266

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  • Individual
  • Male
  • Optometrist

About DEREK CHONG

This page provides the complete NPI Profile along with additional information for Derek Chong, a provider established in Elmhurst, New York with a medical specialization in Optometrist. The healthcare provider is registered in the NPI registry with number 1164431961 assigned on August 2006. The practitioner's primary taxonomy code is 152W00000X with license number TUV006982-1 (NY). The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI
1164431961
Provider Name
DEREK STEPHEN CHONG OD
Gender
Male
Entity Type
Individual
Location Address
90-01 QUEENS BLVD, 3RD FLOOR MACYS VISION EXPRESS ELMHURST, NY 11373
Location Phone
(718) 595-2266
Mailing Address
18015 64TH AVE FRESH MEADOWS, NY 11365
Mailing Phone
(209) 402-7301
Is Sole Proprietor?
Yes
Enumeration Date
08-08-2006
Last Update Date
07-08-2007
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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

Optometrist

Taxonomy Code
152W00000X
Type
Eye and Vision Services Providers
License No.
TUV006982-1
License State
NY
Taxonomy Description
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.

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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 1164431961, we treat the final digit (1) 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 59. The final step is to find the difference between that total and the next multiple of ten (60 - 59 = 1).

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
1
Doubled → 2
Pos 2
1
Unchanged
Pos 3
6
Doubled → 12 → 1 + 2
Pos 4
4
Unchanged
Pos 5
4
Doubled → 8
Pos 6
3
Unchanged
Pos 7
1
Doubled → 2
Pos 8
9
Unchanged
Pos 9
6
Doubled → 12 → 1 + 2
Check
1
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 4 → 8 1 → 2 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 1 + 2 + 4 + 8 + 3 + 2 + 9 + 1 + 2 + 24 = 59

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

The next multiple of ten after 59 is 60. The difference is the calculated check digit.

60 - 59 = 1
This NPI is valid
The calculated check digit is 1, which matches the last digit of 1164431961.

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1164431961, enumerated as an "individual" on August 08, 2006.

The provider is located at 90-01 QUEENS BLVD, 3RD FLOOR MACYS VISION EXPRESS ELMHURST, NY 11373 and the phone number is (718) 595-2266.

Optometrist with taxonomy code 152W00000X.