STEPHEN PIAKIS LDO
NPI 1609725621
Technician/Technologist - Optician in Indian Harbour Beach, FL

NPI Status: Active since January 23, 2026

Contact Information

1001 E EAU GALLIE BLVD
INDIAN HARBOUR BEACH, FL
ZIP 32937
Phone: (321) 775-6353
Fax: (321) 773-8453

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

Individual
Male
Technician/Technologist
Optician

About STEPHEN PIAKIS

This page provides the complete NPI Profile along with additional information for Stephen Piakis, a provider established in Indian Harbour Beach, Florida with a medical specialization in Technician/technologist, focusing in optician . The healthcare provider is registered in the NPI registry with number 1609725621 assigned on January 2026. The practitioner's primary taxonomy code is 156FX1800X with license number DO3505 (FL). The provider is registered as an individual and his NPI record was last updated January 2026.

NPI: 1609725621
Provider Name: STEPHEN PIAKIS LDO
Gender: Male
Entity Type: Individual
Location Address: 1001 E EAU GALLIE BLVD INDIAN HARBOUR BEACH, FL 32937
Location Phone: (321) 775-6353
Location Fax: (321) 773-8453
Mailing Address: 1001 E EAU GALLIE BLVD INDIAN HARBOUR BEACH, FL 32937
Mailing Phone: (321) 775-6353
Mailing Fax: (321) 773-8453
Is Sole Proprietor?: No
Enumeration Date: 01-23-2026
Last Update Date: 01-23-2026
Code Navigator

Location Map

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/Technologist Optician
Taxonomy Code: 156FX1800X
Type: Eye and Vision Services Providers
License No.: DO3505
License State: FL
Taxonomy Description: Opticians help fit eyeglasses and contact lenses, following prescriptions from Ophthalmologists and Optometrists. They also help customers decide which eyeglass frame or contact lenses to buy.

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 1609725621, 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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 0

Pos 4

Unchanged

Pos 5

Doubled → 14 → 1 + 4

Pos 6

Unchanged

Pos 7

Doubled → 10 → 1 + 0

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 0 → 0 7 → 14 → 5 5 → 10 → 1 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 0 + 9 + 1 + 4 + 2 + 1 + 0 + 6 + 4 + 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 1609725621.