DR. CHANPREET GARCHA O.D
NPI 1649155656
Optometrist in Oak Lawn, IL

NPI Status: Active since August 08, 2025

Contact Information

9531 S CICERO AVE
OAK LAWN, IL
ZIP 60453
Phone: (708) 423-2020

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  • Individual
  • Female
  • Optometrist

About CHANPREET GARCHA

This page provides the complete NPI Profile along with additional information for Chanpreet Garcha, a provider established in Oak Lawn, Illinois with a medical specialization in Optometrist. The healthcare provider is registered in the NPI registry with number 1649155656 assigned on August 2025. The practitioner's primary taxonomy code is 152W00000X with license number 046012019 (IL). The provider is registered as an individual and her NPI record was last updated one year ago.

NPI
1649155656
Provider Name
DR. CHANPREET GARCHA O.D
Gender
Female
Entity Type
Individual
Location Address
9531 S CICERO AVE OAK LAWN, IL 60453
Location Phone
(708) 423-2020
Mailing Address
1080 COLLINS CT OAKLAND, MI 48363
Is Sole Proprietor?
Yes
Enumeration Date
08-08-2025
Last Update Date
08-08-2025
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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.
046012019
License State
IL
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 1649155656, 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 64. The final step is to find the difference between that total and the next multiple of ten (70 - 64 = 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.

Pos 1
1
Doubled → 2
Pos 2
6
Unchanged
Pos 3
4
Doubled → 8
Pos 4
9
Unchanged
Pos 5
1
Doubled → 2
Pos 6
5
Unchanged
Pos 7
5
Doubled → 10 → 1 + 0
Pos 8
6
Unchanged
Pos 9
5
Doubled → 10 → 1 + 0
Check
6
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 4 → 8 1 → 2 5 → 10 → 1 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 8 + 9 + 2 + 5 + 1 + 0 + 6 + 1 + 0 + 24 = 64

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

The next multiple of ten after 64 is 70. The difference is the calculated check digit.

70 - 64 = 6
This NPI is valid
The calculated check digit is 6, which matches the last digit of 1649155656.

Other Providers at the Same Location


The following 5 providers are registered at the same or a nearby location.

Optometrist
9531 S CICERO AVE
OAK LAWN, IL 60453
Optometrist
9531 S CICERO AVE, 33
OAK LAWN, IL 60453
Optometrist
9531 S CICERO AVE
OAK LAWN, IL 60453
Optometrist
9531 S CICERO AVE
OAK LAWN, IL 60453
Optometrist
9531 S CICERO AVE
OAK LAWN, IL 60453

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1649155656, enumerated as an "individual" on August 08, 2025.

The provider is located at 9531 S CICERO AVE OAK LAWN, IL 60453 and the phone number is (708) 423-2020.

Optometrist with taxonomy code 152W00000X.