GAY D TREPANIER MD
NPI 1164415709
Family Medicine - Geriatric Medicine in Fond Du Lac, WI
NPI Status: Active since August 30, 2005
Contact Information
481 E DIVISION ST
SUITE 100
FOND DU LAC, WI
ZIP 54935
Phone: (920) 929-8120
Fax: (920) 929-8126
- Individual
- Male
- Family Medicine
- Geriatric Medicine
About GAY TREPANIER
This page provides the complete NPI Profile along with additional information for Gay Trepanier, a primary care provider established in Fond Du Lac, Wisconsin with a medical specialization in Family Medicine, focusing in geriatric medicine . The healthcare provider is registered in the NPI registry with number 1164415709 assigned on August 2005. The practitioner's primary taxonomy code is 207QG0300X with license number 16852 (WI). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1164415709
- Provider Name
- GAY D TREPANIER MD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 481 E DIVISION ST SUITE 100 FOND DU LAC, WI 54935
- Location Phone
- (920) 929-8120
- Location Fax
- (920) 929-8126
- Mailing Address
- 481 E DIVISION ST SUITE 100 FOND DU LAC, WI 54935
- Mailing Phone
- (920) 929-8120
- Mailing Fax
- (920) 929-8126
- Is Sole Proprietor?
- No
- Enumeration Date
- 08-30-2005
- Last Update Date
- 09-11-2025
- Code Navigator
A primary care provider (PCP) like Gay Trepanier sees people with common medical problems. The primary care provider might be a doctor, physician assistant, nurse practitioner or clinic that are usually involved in your long-term care. A PCP might provide preventive care, treat common medical conditions, identify urgent medical problems and refer you to specialists when necessary. Primary care is usually provided in an outpatient facility but if you are admitted to a hospital your PCP may assist in your care. The most common medical conditions seen by primary care providers are: hypertension, upper respiratory tract infections, depression or anxiety, back pain, arthritis, dermatitis, diabetes, urinary tract infections, etc .
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
Family Medicine Geriatric Medicine
- Taxonomy Code
- 207QG0300X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 16852
- License State
- WI
- Taxonomy Description
- A family medicine physician with special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes, and the hospital.
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 | 207Q00000X | Allopathic & Osteopathic Physicians | Family Medicine | 16852 (WI) |
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
Additional Identifiers
The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.
| Identifier | Type / Code | Identifier State | Identifier Issuer |
|---|---|---|---|
| 31081800 | MEDICAID (05) | WI |
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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 1164415709, we treat the final digit (9) 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 51. The final step is to find the difference between that total and the next multiple of ten (60 - 51 = 9).
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 51 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 18 providers are registered at the same or a nearby location.
FOND DU LAC, WI 54935
FOND DU LAC, WI 54935
FOND DU LAC, WI 54935
FOND DU LAC, WI 54935
FOND DU LAC, WI 54935
FOND DU LAC, WI 54935
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1164415709, enumerated as an "individual" on August 30, 2005.
The provider is located at 481 E DIVISION ST SUITE 100 FOND DU LAC, WI 54935 and the phone number is (920) 929-8120.
Family Medicine with taxonomy code 207QG0300X and a focus in Geriatric Medicine.
The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.
