WILLIAM (DCPS) JOHNSON
NPI 1336538255
Social Worker - School in Washington, DC

NPI Status: Active since January 15, 2015

Contact Information

4400 IOWA AVE NW
WASHINGTON, DC
ZIP 20011
Phone: (202) 576-8130

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

Individual
Male
Social Worker
School

About WILLIAM (DCPS) JOHNSON

This page provides the complete NPI Profile along with additional information for William (dcps) Johnson, a provider established in Washington, District Of Columbia with a medical specialization in Social Worker, focusing in school . The healthcare provider is registered in the NPI registry with number 1336538255 assigned on January 2015. The practitioner's primary taxonomy code is 1041S0200X with license number LC302384 (DC). The provider is registered as an individual and his NPI record was last updated 11 years ago.

NPI: 1336538255
Provider Name: WILLIAM (DCPS) JOHNSON
Gender: Male
Entity Type: Individual
Location Address: 4400 IOWA AVE NW WASHINGTON, DC 20011
Location Phone: (202) 576-8130
Mailing Address: 8315 FOUNDERS TER FORT WASHINGTON, MD 20744
Mailing Phone: (301) 839-2833
Is Sole Proprietor?: Yes
Enumeration Date: 01-15-2015
Last Update Date: 01-15-2015
Code Navigator

A school social worker like William (dcps) Johnson works with teachers, parents, and school administrators to develop plans and strategies to improve students' academic performance and social development. Students are referred to school social workers to deal with problems like aggressive behavior, bullying, or frequent school absences.

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: Social Worker School
Taxonomy Code: 1041S0200X
Type: Behavioral Health & Social Service Providers
License No.: LC302384
License State: DC

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 1336538255, 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.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 6

Pos 4

Unchanged

Pos 5

Doubled → 10 → 1 + 0

Pos 6

Unchanged

Pos 7

Doubled → 16 → 1 + 6

Pos 8

Unchanged

Pos 9

Doubled → 10 → 1 + 0

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 3 → 6 5 → 10 → 1 8 → 16 → 7 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

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

2 + 3 + 6 + 6 + 1 + 0 + 3 + 1 + 6 + 2 + 1 + 0 + 24 = 55

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.

60 - 55 = 5

This NPI is valid

The calculated check digit is 5, which matches the last digit of 1336538255.