THOMAS PEPER OD
NPI 1366961021
Optometrist in Fort Irwin, CA
NPI Status: Active since September 13, 2017
Contact Information
WEED ARMY COMMUNITY HOSPITAL BLDG 390 NORTH LOOP RD.
FORT IRWIN, CA
ZIP 92310
Phone: (866) 957-9224
NPPES record last updated: February 26, 2026. Verified against the NPPES registry weekly; last sync: July 12, 2026.
Record update history: Apr 12, 2023, Sep 16, 2022, Sep 13, 2017 (3 updates tracked since 2017).
- Individual
- Male
- Optometrist
About THOMAS PEPER
This page provides the complete NPI Profile along with additional information for Thomas Peper, a provider established in Fort Irwin, California with a medical specialization in Optometrist. The healthcare provider is registered in the NPI registry with number 1366961021 assigned on September 2017. The practitioner's primary taxonomy code is 152W00000X with license number 10373566-9934 (UT). The provider is registered as an individual and his NPI record was last updated February 2026.
- NPI
- 1366961021
- Provider Name
- THOMAS PEPER OD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- WEED ARMY COMMUNITY HOSPITAL BLDG 390 NORTH LOOP RD. FORT IRWIN, CA 92310
- Location Phone
- (866) 957-9224
- Mailing Address
- 4737A ELSENBORN RIDGE ST FORT IRWIN, CA 92310
- Is Sole Proprietor?
- No
- Enumeration Date
- 09-13-2017
- Last Update Date
- 02-26-2026
- 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
Optometrist
- Taxonomy Code
- 152W00000X
- Type
- Eye and Vision Services Providers
- License No.
- 10373566-9934
- License State
- UT
- Taxonomy Description
- Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.
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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 1366961021, 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.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1366961021, enumerated as an "individual" on September 13, 2017.
The provider is located at WEED ARMY COMMUNITY HOSPITAL BLDG 390 NORTH LOOP RD. FORT IRWIN, CA 92310 and the phone number is (866) 957-9224.
Optometrist with taxonomy code 152W00000X.
