JOHN LEON CLARK DPM
NPI 1134382377
Podiatrist - Foot & Ankle Surgery in Callahan, FL
NPI Status: Active since July 08, 2008
Contact Information
542067 US HIGHWAY 1
CALLAHAN, FL
ZIP 32011
Phone: (904) 879-2552
Fax: (904) 879-6360
NPPES record last updated: July 8, 2008. Verified against the NPPES registry weekly; last sync: July 12, 2026.
- Individual
- Male
- Podiatrist
- Foot & Ankle Surgery
About JOHN CLARK
This page provides the complete NPI Profile along with additional information for John Clark, a provider established in Callahan, Florida with a medical specialization in Podiatrist, focusing in foot & ankle surgery . The healthcare provider is registered in the NPI registry with number 1134382377 assigned on July 2008. The practitioner's primary taxonomy code is 213ES0103X with license number PO2985 (FL). The provider is registered as an individual and his NPI record was last updated 18 years ago.
- NPI
- 1134382377
- Provider Name
- JOHN LEON CLARK DPM
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 542067 US HIGHWAY 1 CALLAHAN, FL 32011
- Location Phone
- (904) 879-2552
- Location Fax
- (904) 879-6360
- Mailing Address
- PO BOX 1578 CALLAHAN, FL 32011
- Mailing Phone
- (904) 879-2552
- Mailing Fax
- (904) 879-6360
- Is Sole Proprietor?
- No
- Enumeration Date
- 07-08-2008
- Last Update Date
- 07-08-2008
- 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
Podiatrist Foot & Ankle Surgery
- Taxonomy Code
- 213ES0103X
- Type
- Podiatric Medicine & Surgery Service Providers
- License No.
- PO2985
- License State
- FL
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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 1134382377, we treat the final digit (7) 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 63. The final step is to find the difference between that total and the next multiple of ten (70 - 63 = 7).
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 63 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 2 providers are registered at the same or a nearby location.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1134382377, enumerated as an "individual" on July 08, 2008.
The provider is located at 542067 US HIGHWAY 1 CALLAHAN, FL 32011 and the phone number is (904) 879-2552.
Podiatrist with taxonomy code 213ES0103X and a focus in Foot & Ankle Surgery.
