SARAH DILLON MSW, TYPE-73
NPI 1831815521
Counselor - School in Crestwood, IL

NPI Status: Active since October 14, 2022

Contact Information

13020 S CENTRAL AVE
CRESTWOOD, IL
ZIP 60418
Phone: (708) 389-0555

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

Individual
Female
Counselor
School

About SARAH DILLON

This page provides the complete NPI Profile along with additional information for Sarah Dillon, a provider established in Crestwood, Illinois with a medical specialization in Counselor, focusing in school . The healthcare provider is registered in the NPI registry with number 1831815521 assigned on October 2022. The practitioner's primary taxonomy code is 101YS0200X. The provider is registered as an individual and her NPI record was last updated 4 years ago.

NPI: 1831815521
Provider Name: SARAH DILLON MSW, TYPE-73
Gender: Female
Entity Type: Individual
Location Address: 13020 S CENTRAL AVE CRESTWOOD, IL 60418
Location Phone: (708) 389-0555
Mailing Address: 2540 YELLOW STAR ST WOODRIDGE, IL 60517
Is Sole Proprietor?: No
Enumeration Date: 10-14-2022
Last Update Date: 10-14-2022
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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: Counselor School
Taxonomy Code: 101YS0200X
Type: Behavioral Health & Social Service Providers

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 1831815521, 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.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 6

Pos 4

Unchanged

Pos 5

Doubled → 16 → 1 + 6

Pos 6

Unchanged

Pos 7

Doubled → 10 → 1 + 0

Pos 8

Unchanged

Pos 9

Doubled → 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 3 → 6 8 → 16 → 7 5 → 10 → 1 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 6 + 1 + 1 + 6 + 1 + 1 + 0 + 5 + 4 + 24 = 59

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.

60 - 59 = 1

This NPI is valid

The calculated check digit is 1, which matches the last digit of 1831815521.