LANCE DYLAN VELVIN O.D.
NPI 1669323929
Optometrist - Occupational Vision in San Antonio, TX

NPI Status: Active since February 04, 2026

Contact Information

800 MCCULLOUGH AVE
SAN ANTONIO, TX
ZIP 78215
Phone: (210) 226-6169

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

Individual
Male
Optometrist
Occupational Vision

About LANCE VELVIN

This page provides the complete NPI Profile along with additional information for Lance Velvin, a provider established in San Antonio, Texas with a medical specialization in Optometrist, focusing in occupational vision . The healthcare provider is registered in the NPI registry with number 1669323929 assigned on February 2026. The practitioner's primary taxonomy code is 152WX0102X with license number 11410TG (TX). The provider is registered as an individual and his NPI record was last updated February 2026.

NPI: 1669323929
Provider Name: LANCE DYLAN VELVIN O.D.
Gender: Male
Entity Type: Individual
Location Address: 800 MCCULLOUGH AVE SAN ANTONIO, TX 78215
Location Phone: (210) 226-6169
Mailing Address: 800 MCCULLOUGH AVE SAN ANTONIO, TX 78215
Mailing Phone: (210) 226-6169
Is Sole Proprietor?: No
Enumeration Date: 02-04-2026
Last Update Date: 02-04-2026
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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 Occupational Vision
Taxonomy Code: 152WX0102X
Type: Eye and Vision Services Providers
License No.: 11410TG
License State: TX
Taxonomy Description: Optometrists who work in Occupational Vision, the branch of environmental optometry, consider all aspects of the relationship between work and vision, visual performances, eye safety, and health.

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 1669323929, 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 71. The final step is to find the difference between that total and the next multiple of ten (80 - 71 = 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 → 12 → 1 + 2

Pos 4

Unchanged

Pos 5

Doubled → 6

Pos 6

Unchanged

Pos 7

Doubled → 6

Pos 8

Unchanged

Pos 9

Doubled → 4

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 3 → 6 3 → 6 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 1 + 2 + 9 + 6 + 2 + 6 + 9 + 4 + 24 = 71

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

The next multiple of ten after 71 is 80. The difference is the calculated check digit.

80 - 71 = 9

This NPI is valid

The calculated check digit is 9, which matches the last digit of 1669323929.