MR. BRIAN EVERETT BARNHART HIS
NPI 1639019680
Hearing Instrument Specialist in Saint Charles, MO
NPI Status: Active since March 30, 2026
Contact Information
607 S 5TH ST
SAINT CHARLES, MO
ZIP 63301
Phone: (636) 487-5881
- Individual
- Male
- Hearing Instrument Specialist
About BRIAN BARNHART
This page provides the complete NPI Profile along with additional information for Brian Barnhart, a provider established in Saint Charles, Missouri with a medical specialization in Hearing Instrument Specialist. The healthcare provider is registered in the NPI registry with number 1639019680 assigned on March 2026. The practitioner's primary taxonomy code is 237700000X with license number 2026005757 (MO). The provider is registered as an individual and his NPI record was last updated March 2026.
- NPI
- 1639019680
- Provider Name
- MR. BRIAN EVERETT BARNHART HIS
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 607 S 5TH ST SAINT CHARLES, MO 63301
- Location Phone
- (636) 487-5881
- Mailing Address
- 330 DEVONSHIRE CT SAINT PETERS, MO 63376
- Mailing Phone
- (636) 487-5881
- Is Sole Proprietor?
- No
- Enumeration Date
- 03-30-2026
- Last Update Date
- 03-30-2026
- Code Navigator
Location Map
Secondary Locations
- 929 N Highway 67 St
Florissant, MO 63031
(314) 838-5959
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
Hearing Instrument Specialist
- Taxonomy Code
- 237700000X
- Type
- Speech, Language and Hearing Service Providers
- License No.
- 2026005757
- License State
- MO
- Taxonomy Description
- Individuals who test hearing for the selection, adaptation, fitting, adjusting, servicing, and sale of hearing aids. Hearing Instrument Specialist is a designation provided individuals who qualify by the National Hearing Aid Society
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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 1639019680, 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 70. The final step is to find the difference between that total and the next multiple of ten (70 - 70 = 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 70 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 1 provider is registered at the same or a nearby location.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1639019680, enumerated as an "individual" on March 30, 2026.
The provider is located at 607 S 5TH ST SAINT CHARLES, MO 63301 and the phone number is (636) 487-5881.
Hearing Instrument Specialist with taxonomy code 237700000X.
