DR. GREGORY THOMAS BROWN II MD, PHD
NPI 1861826521
Pathology - Anatomic Pathology in Bethesda, MD
NPI Status: Active since August 29, 2013
Contact Information
41 CENTER DR RM A101H
BETHESDA, MD
ZIP 20892
Phone: (240) 858-7227
- Individual
- Male
- Pathology
- Anatomic Pathology
About GREGORY BROWN
This page provides the complete NPI Profile along with additional information for Gregory Brown, a provider established in Bethesda, Maryland with a medical specialization in Pathology, focusing in anatomic pathology . The healthcare provider is registered in the NPI registry with number 1861826521 assigned on August 2013. The practitioner's primary taxonomy code is 207ZP0101X with license number 105483 (GA). The provider is registered as an individual and his NPI record was last updated January 2026.
- NPI
- 1861826521
- Provider Name
- DR. GREGORY THOMAS BROWN II MD, PHD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 41 CENTER DR RM A101H BETHESDA, MD 20892
- Location Phone
- (240) 858-7227
- Mailing Address
- 41 CENTER DR BLDG 41 BETHESDA, MD 20892
- Mailing Phone
- (240) 858-7227
- Is Sole Proprietor?
- No
- Enumeration Date
- 08-29-2013
- Last Update Date
- 01-23-2026
- 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
- Taxonomy Code
- 207ZP0101X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 105483
- License State
- GA
- 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 1861826521, 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 1861826521, enumerated as an "individual" on August 29, 2013.
The provider is located at 41 CENTER DR RM A101H BETHESDA, MD 20892 and the phone number is (240) 858-7227.
Pathology with taxonomy code 207ZP0101X and a focus in Anatomic Pathology.
