DEREK ANDREW FIEDLER MS, DABR
NPI 1679446447
Radiology - Radiological Physics in Springfield, IL
NPI Status: Active since September 26, 2025
Contact Information
701 N 1ST ST
SPRINGFIELD, IL
ZIP 62781
Phone: (847) 370-2194
- Individual
- Male
- Radiology
- Radiological Physics
About DEREK FIEDLER
This page provides the complete NPI Profile along with additional information for Derek Fiedler, a provider established in Springfield, Illinois with a medical specialization in Radiology, focusing in radiological physics . The healthcare provider is registered in the NPI registry with number 1679446447 assigned on September 2025. The practitioner's primary taxonomy code is 2085R0205X with license number FMP02000228 (TX). The provider is registered as an individual and his NPI record was last updated April 2026. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization.
- NPI
- 1679446447
- Provider Name
- DEREK ANDREW FIEDLER MS, DABR
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 701 N 1ST ST SPRINGFIELD, IL 62781
- Location Phone
- (847) 370-2194
- Mailing Address
- 6824 CORONADO AVE DALLAS, TX 75214
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 09-26-2025
- Last Update Date
- 04-07-2026
- 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
Radiology Radiological Physics
- Taxonomy Code
- 2085R0205X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- FMP02000228
- License State
- TX
- Taxonomy Description
- A radiological physicist deals with the diagnostic and therapeutic applications of roentgen rays, gamma rays from sealed sources, ultrasonic radiation and radio-frequency radiation, as well as the equipment associated with their production and use, including radiation safety.
Group Taxonomy 193400000X SINGLE SPECIALTY GROUP
This provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.
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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 1679446447, we treat the final digit (7) 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 73. The final step is to find the difference between that total and the next multiple of ten (80 - 73 = 7).
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 73 is 80. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
SPRINGFIELD, IL 62781
SPRINGFIELD, IL 62781
SPRINGFIELD, IL 62781
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1679446447, enumerated as an "individual" on September 26, 2025.
The provider is located at 701 N 1ST ST SPRINGFIELD, IL 62781 and the phone number is (847) 370-2194.
Radiology with taxonomy code 2085R0205X and a focus in Radiological Physics.
