DR. LINDSAY SUE WILLIAMS OD
NPI 1275212409
Optometrist - Pediatrics in Colorado Springs, CO

NPI Status: Active since July 14, 2023

Contact Information

350 PRINTERS PKWY
COLORADO SPRINGS, CO
ZIP 80910
Phone: (719) 596-2020

Recently Updated NPI Information
Some details in this NPI profile have been updated in the NPI registry within the last 30 days.

Table of Contents

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

Individual
Female
Optometrist
Pediatrics

About LINDSAY WILLIAMS

This page provides the complete NPI Profile along with additional information for Lindsay Williams, a provider established in Colorado Springs, Colorado with a medical specialization in Optometrist, focusing in pediatrics . The healthcare provider is registered in the NPI registry with number 1275212409 assigned on July 2023. The practitioner's primary taxonomy code is 152WP0200X with license number OPT4021 (CO). The provider is registered as an individual and her NPI record was last updated June 2026.

NPI: 1275212409
Provider Name: DR. LINDSAY SUE WILLIAMS OD
Other Name: LINDSAY CARROLL OD
Other Name Type: Professional Name (2)
Gender: Female
Entity Type: Individual
Location Address: 350 PRINTERS PKWY COLORADO SPRINGS, CO 80910
Location Phone: (719) 596-2020
Mailing Address: 1755 N EMERSON ST APT F DENVER, CO 80218
Is Sole Proprietor?: No
Enumeration Date: 07-14-2023
Last Update Date: 06-30-2026
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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 Pediatrics
Taxonomy Code: 152WP0200X
Type: Eye and Vision Services Providers
License No.: OPT4021
License State: CO
Taxonomy Description: Optometrists who work in Pediatrics are concerned with the prevention, development, diagnosis, and treatment of visual problems in children.

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 1275212409, 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 51. The final step is to find the difference between that total and the next multiple of ten (60 - 51 = 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.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 14 → 1 + 4

Pos 4

Unchanged

Pos 5

Doubled → 4

Pos 6

Unchanged

Pos 7

Doubled → 4

Pos 8

Unchanged

Pos 9

Doubled → 0

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 7 → 14 → 5 2 → 4 2 → 4 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 2 + 1 + 4 + 5 + 4 + 1 + 4 + 4 + 0 + 24 = 51

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

The next multiple of ten after 51 is 60. The difference is the calculated check digit.

60 - 51 = 9

This NPI is valid

The calculated check digit is 9, which matches the last digit of 1275212409.