DR. BRIAN DARNELL BIEKMAN PHD
NPI 1841126570
Clinical Neuropsychologist in Rockville, MD

NPI Status: Active since June 22, 2026

Contact Information

15245 SHADY GROVE RD STE 350
ROCKVILLE, MD
ZIP 20850
Phone: (301) 765-5430

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Newly Listed Provider
This NPI profile has been added to the NPI registry within the last 30 days.

Table of Contents

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

Individual
Male
Clinical Neuropsychologist

About BRIAN BIEKMAN

This page provides the complete NPI Profile along with additional information for Brian Biekman, a provider established in Rockville, Maryland with a medical specialization in Clinical Neuropsychologist. The healthcare provider is registered in the NPI registry with number 1841126570 assigned on June 2026. The practitioner's primary taxonomy code is 103G00000X with license number 07446 (MD). The provider is registered as an individual and his NPI record was last updated June 2026.

NPI: 1841126570
Provider Name: DR. BRIAN DARNELL BIEKMAN PHD
Gender: Male
Entity Type: Individual
Location Address: 15245 SHADY GROVE RD STE 350 ROCKVILLE, MD 20850
Location Phone: (301) 765-5430
Mailing Address: 15245 SHADY GROVE RD STE 350 ROCKVILLE, MD 20850
Is Sole Proprietor?: No
Enumeration Date: 06-22-2026
Last Update Date: 06-22-2026

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: Clinical Neuropsychologist
Taxonomy Code: 103G00000X
Type: Behavioral Health & Social Service Providers
License No.: 07446
License State: MD
Taxonomy Description: A clinical psychologist who applies principles of assessment and intervention based upon the scientific study of human behavior as it relates to normal and abnormal functioning of the central nervous system. The specialty is dedicated to enhancing the understanding of brain-behavior relationships and the application of such knowledge to human problems.

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 1841126570, 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 60. The final step is to find the difference between that total and the next multiple of ten (60 - 60 = 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.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 8

Pos 4

Unchanged

Pos 5

Doubled → 2

Pos 6

Unchanged

Pos 7

Doubled → 12 → 1 + 2

Pos 8

Unchanged

Pos 9

Doubled → 14 → 1 + 4

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 4 → 8 1 → 2 6 → 12 → 3 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 8 + 1 + 2 + 2 + 1 + 2 + 5 + 1 + 4 + 24 = 60

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

The next multiple of ten after 60 is 60. The difference is the calculated check digit.

60 - 60 = 0

This NPI is valid

The calculated check digit is 0, which matches the last digit of 1841126570.