DR. JAMES HALLMAN M.D.
NPI 1083675698
Pathology - Dermatopathology in Silver Spring, MD

NPI Status: Active since March 31, 2006

Contact Information

606 STEPHEN SITTER AVE
SILVER SPRING, MD
ZIP 20910
Phone: (301) 295-5254

NPI Profile Information
Primary Taxonomy
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Pathology
Dermatopathology

About JAMES HALLMAN

This page provides the complete NPI Profile along with additional information for James Hallman, a provider established in Silver Spring, Maryland with a medical specialization in Pathology, focusing in dermatopathology . The healthcare provider is registered in the NPI registry with number 1083675698 assigned on March 2006. The practitioner's primary taxonomy code is 207ZD0900X with license number 39906 (NC). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI: 1083675698
Provider Name: DR. JAMES HALLMAN M.D.
Gender: Male
Entity Type: Individual
Location Address: 606 STEPHEN SITTER AVE SILVER SPRING, MD 20910
Location Phone: (301) 295-5254
Mailing Address: 606 STEPHEN SITTER AVE SILVER SPRING, MD 20910
Mailing Phone: (301) 295-5254
Is Sole Proprietor?: No
Enumeration Date: 03-31-2006
Last Update Date: 12-08-2025
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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 Dermatopathology
Taxonomy Code: 207ZD0900X
Type: Allopathic & Osteopathic Physicians
License No.: 39906
License State: NC
Taxonomy Description: A dermatopathologist is an expert in diagnosing and monitoring diseases of the skin including infectious, immunologic, degenerative, and neoplastic diseases. This entails the examination and interpretation of specially prepared tissue sections, cellular scrapings, and smears of skin lesions by means of light microscopy, electron microscopy, and fluorescence microscopy.

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 1083675698, we treat the final digit (8) 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 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 8).

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.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 16 → 1 + 6

Pos 4

Unchanged

Pos 5

Doubled → 12 → 1 + 2

Pos 6

Unchanged

Pos 7

Doubled → 10 → 1 + 0

Pos 8

Unchanged

Pos 9

Doubled → 18 → 1 + 8

Check

Target digit

Regular digit Doubled digit Check digit

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.

1 → 2 8 → 16 → 7 6 → 12 → 3 5 → 10 → 1 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 0 + 1 + 6 + 3 + 1 + 2 + 7 + 1 + 0 + 6 + 1 + 8 + 24 = 62

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 62 is 70. The difference is the calculated check digit.

70 - 62 = 8

This NPI is valid

The calculated check digit is 8, which matches the last digit of 1083675698.