DR. HARRY ELLSWORTH SIEGRIST III D.C, L.D.O.
NPI 1851434476
Technician/Technologist - Optician in Austell, GA
NPI Status: Active since February 14, 2007
Contact Information
1781 VETERANS MEMORIAL HWY STE 1A
AUSTELL, GA
ZIP 30168
Phone: (770) 941-3802
Fax: (770) 739-2020
- Individual
- Male
- Technician/Technologist
- Optician
About HARRY SIEGRIST
This page provides the complete NPI Profile along with additional information for Harry Siegrist, a provider established in Austell, Georgia with a medical specialization in Technician/technologist, focusing in optician . The healthcare provider is registered in the NPI registry with number 1851434476 assigned on February 2007. The practitioner's primary taxonomy code is 156FX1800X with license number 875 (FL). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1851434476
- Provider Name
- DR. HARRY ELLSWORTH SIEGRIST III D.C, L.D.O.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 1781 VETERANS MEMORIAL HWY STE 1A AUSTELL, GA 30168
- Location Phone
- (770) 941-3802
- Location Fax
- (770) 739-2020
- Mailing Address
- 4140 FALCON DR AUSTELL, GA 30106
- Mailing Phone
- (770) 941-6063
- Mailing Fax
- (770) 739-2020
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 02-14-2007
- Last Update Date
- 09-11-2025
- 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.
- 875
- 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.
Secondary Taxonomies
The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.
| No. | Taxonomy Code | Type | Classification / Specialization |
License No. (State) |
|---|---|---|---|---|
| 1 | 111NX0800X | Chiropractic Providers | Chiropractor | 2148 (GA) |
| 2 | 111NX0800X | Chiropractic Providers | Chiropractor | 4508 (FL) |
| 3 | 111NX0800X | Chiropractic Providers | Chiropractor | 3452-012 (WI) |
| 4 | 156FX1800X | Eye and Vision Services Providers | Technician/Technologist | 645 (GA) |
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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 1851434476, 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.
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.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
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.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1851434476, enumerated as an "individual" on February 14, 2007.
The provider is located at 1781 VETERANS MEMORIAL HWY STE 1A AUSTELL, GA 30168 and the phone number is (770) 941-3802.
Technician/Technologist with taxonomy code 156FX1800X and a focus in Optician.
