MICHAEL JOHN SPAK MD
NPI 1831145721
Radiology - Radiological Physics in Eau Claire, WI
NPI Status: Active since May 25, 2006
Contact Information
900 WEST CLAIREMONT AVENUE
EAU CLAIRE, WI
ZIP 54701
Phone: (715) 839-4151
- Individual
- Male
- Radiology
- Radiological Physics
About MICHAEL SPAK
This page provides the complete NPI Profile along with additional information for Michael Spak, a provider established in Eau Claire, Wisconsin with a medical specialization in Radiology, focusing in radiological physics . The healthcare provider is registered in the NPI registry with number 1831145721 assigned on May 2006. The practitioner's primary taxonomy code is 2085R0205X with license number 20002 (WI). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1831145721
- Provider Name
- MICHAEL JOHN SPAK MD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 900 WEST CLAIREMONT AVENUE EAU CLAIRE, WI 54701
- Location Phone
- (715) 839-4151
- Mailing Address
- 2715 WEST FRANK STREET EAU CLAIRE, WI 54703
- Mailing Phone
- (715) 834-5511
- Mailing Fax
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 05-25-2006
- 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
Radiology Radiological Physics
- Taxonomy Code
- 2085R0205X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 20002
- License State
- WI
- 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.
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 | 2085B0100X | Allopathic & Osteopathic Physicians | Radiology | 20002 (WI) |
| 2 | 2085B0100X | Allopathic & Osteopathic Physicians | Radiology | 101042 (MN) |
| 3 | 2085N0700X | Allopathic & Osteopathic Physicians | Radiology | 20002 (WI) |
| 4 | 2085N0700X | Allopathic & Osteopathic Physicians | Radiology | 101042 (MN) |
| 5 | 2085N0904X | Allopathic & Osteopathic Physicians | Radiology | 20002 (WI) |
| 6 | 2085N0904X | Allopathic & Osteopathic Physicians | Radiology | 101042 (MN) |
| 7 | 2085P0229X | Allopathic & Osteopathic Physicians | Radiology | 20002 (WI) |
| 8 | 2085P0229X | Allopathic & Osteopathic Physicians | Radiology | 101042 (MN) |
| 9 | 2085R0202X | Allopathic & Osteopathic Physicians | Radiology | 20002 (WI) |
| 10 | 2085R0202X | Allopathic & Osteopathic Physicians | Radiology | 101042 (MN) |
| 11 | 2085R0204X | Allopathic & Osteopathic Physicians | Radiology | 20002 (WI) |
| 12 | 2085R0204X | Allopathic & Osteopathic Physicians | Radiology | 101042 (MN) |
| 13 | 2085U0001X | Allopathic & Osteopathic Physicians | Radiology | 20002 (WI) |
| 14 | 2085U0001X | Allopathic & Osteopathic Physicians | Radiology | 101042 (MN) |
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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 1831145721, 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.
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 59 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 7 providers are registered at the same or a nearby location.
EAU CLAIRE, WI 54701
EAU CLAIRE, WI 54701
EAU CLAIRE, WI 54701
EAU CLAIRE, WI 54701
EAU CLAIRE, WI 54701
EAU CLAIRE, WI 54701
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1831145721, enumerated as an "individual" on May 25, 2006.
The provider is located at 900 WEST CLAIREMONT AVENUE EAU CLAIRE, WI 54701 and the phone number is (715) 839-4151.
Radiology with taxonomy code 2085R0205X and a focus in Radiological Physics.
