MR. ROBERT CARTER WILLIAMSON MD
NPI 1356277065
Pathology - Anatomic Pathology & Clinical Pathology in Charleston, SC
NPI Status: Active since June 20, 2026
Contact Information
169 ASHLEY AVE RM 202
CHARLESTON, SC
ZIP 29425
Phone: (843) 792-2447
This NPI profile has been added to the NPI registry within the last 30 days.
- Individual
- Male
- Pathology
- Anatomic Pathology & Clinical Pathology
About ROBERT WILLIAMSON
This page provides the complete NPI Profile along with additional information for Robert Williamson, a provider established in Charleston, South Carolina with a medical specialization in Pathology, focusing in anatomic pathology & clinical pathology . The healthcare provider is registered in the NPI registry with number 1356277065 assigned on June 2026. The practitioner's primary taxonomy code is 207ZP0102X with license number 97265 (SC). The provider is registered as an individual and his NPI record was last updated June 2026.
- NPI
- 1356277065
- Provider Name
- MR. ROBERT CARTER WILLIAMSON MD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 169 ASHLEY AVE RM 202 CHARLESTON, SC 29425
- Location Phone
- (843) 792-2447
- Mailing Address
- 169 ASHLEY AVE RM 202 CHARLESTON, SC 29425
- Mailing Phone
- (843) 792-2447
- Is Sole Proprietor?
- No
- Enumeration Date
- 06-20-2026
- Last Update Date
- 06-20-2026
- 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
Pathology Anatomic Pathology & Clinical Pathology
- Taxonomy Code
- 207ZP0102X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 97265
- License State
- SC
- Taxonomy Description
- A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
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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 1356277065, we treat the final digit (5) 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 55. The final step is to find the difference between that total and the next multiple of ten (60 - 55 = 5).
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 55 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.
CHARLESTON, SC 29425
CHARLESTON, SC 29425
CHARLESTON, SC 29425
CHARLESTON, SC 29425
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1356277065, enumerated as an "individual" on June 20, 2026.
The provider is located at 169 ASHLEY AVE RM 202 CHARLESTON, SC 29425 and the phone number is (843) 792-2447.
Pathology with taxonomy code 207ZP0102X and a focus in Anatomic Pathology & Clinical Pathology.
