ELIZABETH LEGG
NPI 1609718097
Psychologist - School in Fairfax, VA

NPI Status: Active since April 07, 2026

Contact Information

8270 WILLOW OAKS CORPORATE DR
FAIRFAX, VA
ZIP 22031
Phone: (703) 924-5600

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

Individual
Female
Psychologist
School

About ELIZABETH LEGG

This page provides the complete NPI Profile along with additional information for Elizabeth Legg, a provider established in Fairfax, Virginia with a medical specialization in Psychologist, focusing in school . The healthcare provider is registered in the NPI registry with number 1609718097 assigned on April 2026. The practitioner's primary taxonomy code is 103TS0200X with license number PPS-0609561 (VA). The provider is registered as an individual and her NPI record was last updated April 2026.

NPI: 1609718097
Provider Name: ELIZABETH LEGG
Gender: Female
Entity Type: Individual
Location Address: 8270 WILLOW OAKS CORPORATE DR FAIRFAX, VA 22031
Location Phone: (703) 924-5600
Mailing Address: 8270 WILLOW OAKS CORPORATE DR FAIRFAX, VA 22031
Is Sole Proprietor?: No
Enumeration Date: 04-07-2026
Last Update Date: 04-07-2026
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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: Psychologist School
Taxonomy Code: 103TS0200X
Type: Behavioral Health & Social Service Providers
License No.: PPS-0609561
License State: VA
Taxonomy Description: A psychologist whose specialty is concerned with the science and practice of psychology with children, youth, families; learners of all ages; and the schooling process. The basic education and training of school psychologists prepares them to provide a range of psychological diagnosis, assessment, intervention, prevention, health promotion, and program development and evaluation services with a special focus on the developmental processes of children and youth within the context of schools, families and other systems. School psychologists are prepared to intervene at the individual and system level, and develop, implement, and evaluate preventive programs. In these efforts, they conduct ecologically valid assessments and intervene to promote positive learning environments within which children and youth from diverse backgrounds to ensure that all have equal access to effective educational and psychological services that promote healthy development

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 1609718097, 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.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 0

Pos 4

Unchanged

Pos 5

Doubled → 14 → 1 + 4

Pos 6

Unchanged

Pos 7

Doubled → 16 → 1 + 6

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 0 → 0 7 → 14 → 5 8 → 16 → 7 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 0 + 9 + 1 + 4 + 1 + 1 + 6 + 0 + 1 + 8 + 24 = 63

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.

70 - 63 = 7

This NPI is valid

The calculated check digit is 7, which matches the last digit of 1609718097.