GREGORY ROBERT GUSTAVSON APRN
NPI 1770418030
Radiology - Vascular & Interventional Radiology in Willimantic, CT
NPI Status: Active since June 16, 2026
Contact Information
112 MANSFIELD AVE
WILLIMANTIC, CT
ZIP 06226
Phone: (860) 456-9116
This NPI profile has been added to the NPI registry within the last 30 days.
- Individual
- Male
- Radiology
- Vascular & Interventional Radiology
About GREGORY GUSTAVSON
This page provides the complete NPI Profile along with additional information for Gregory Gustavson, a provider established in Willimantic, Connecticut with a medical specialization in Radiology, focusing in vascular & interventional radiology . The healthcare provider is registered in the NPI registry with number 1770418030 assigned on June 2026. The practitioner's primary taxonomy code is 2085R0204X with license number 12.017664 (CT). The provider is registered as an individual and his NPI record was last updated June 2026.
- NPI
- 1770418030
- Provider Name
- GREGORY ROBERT GUSTAVSON APRN
- Other Name
- GREG ROBERT GUSTAVSON APRN
- Other Name Type
- Other Name (5)
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 112 MANSFIELD AVE WILLIMANTIC, CT 06226
- Location Phone
- (860) 456-9116
- Mailing Address
- 5 BEAUDET TER COLUMBIA, CT 06237
- Mailing Phone
- (860) 617-0730
- Is Sole Proprietor?
- No
- Enumeration Date
- 06-16-2026
- Last Update Date
- 06-16-2026
- Code Navigator
Location Map
Secondary Locations
- 435 Lewis Ave
Meriden, CT 06451
(203) 694-8928 - 100 Grand St
New Britain, CT 06052
(860) 276-5000 - 326 Washington St
Norwich, CT 06360
(860) 889-8331
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 Vascular & Interventional Radiology
- Taxonomy Code
- 2085R0204X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 12.017664
- License State
- CT
- Taxonomy Description
- A radiologist who diagnoses and treats diseases by various radiologic imaging modalities. These include fluoroscopy, digital radiography, computed tomography, sonography and magnetic resonance imaging.
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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 1770418030, we treat the final digit (0) 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 60. The final step is to find the difference between that total and the next multiple of ten (60 - 60 = 0).
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 60 is 60. 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.
WILLIMANTIC, CT 06226
WILLIMANTIC, CT 06226
WILLIMANTIC, CT 06226
WILLIMANTIC, CT 06226
WILLIMANTIC, CT 06226
WILLIMANTIC, CT 06226
WILLIMANTIC, CT 06226
WILLIMANTIC, CT 06226
WILLIMANTIC, CT 06226
WILLIMANTIC, CT 06226
WILLIMANTIC, CT 06226
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1770418030, enumerated as an "individual" on June 16, 2026.
The provider is located at 112 MANSFIELD AVE WILLIMANTIC, CT 06226 and the phone number is (860) 456-9116.
Radiology with taxonomy code 2085R0204X and a focus in Vascular & Interventional Radiology.
