ERIN CHRISTINE CALLAHAN LCPC
NPI 1982542304
Counselor - Professional in Park Ridge, IL

NPI Status: Active since March 24, 2026

Contact Information

350 S NORTHWEST HWY STE 300
PARK RIDGE, IL
ZIP 60068
Phone: (312) 788-7874

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

Individual
Female
Counselor
Professional

About ERIN CALLAHAN

This page provides the complete NPI Profile along with additional information for Erin Callahan, a provider established in Park Ridge, Illinois with a medical specialization in Counselor, focusing in professional . The healthcare provider is registered in the NPI registry with number 1982542304 assigned on March 2026. The practitioner's primary taxonomy code is 101YP2500X with license number 180.017834 (IL). The provider is registered as an individual and her NPI record was last updated March 2026.

NPI: 1982542304
Provider Name: ERIN CHRISTINE CALLAHAN LCPC
Gender: Female
Entity Type: Individual
Location Address: 350 S NORTHWEST HWY STE 300 PARK RIDGE, IL 60068
Location Phone: (312) 788-7874
Mailing Address: 7540 N OVERHILL AVE CHICAGO, IL 60631
Mailing Phone: (773) 329-7972
Is Sole Proprietor?: No
Enumeration Date: 03-24-2026
Last Update Date: 03-24-2026
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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: Counselor Professional
Taxonomy Code: 101YP2500X
Type: Behavioral Health & Social Service Providers
License No.: 180.017834
License State: IL

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 1982542304, we treat the final digit (4) 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 56. The final step is to find the difference between that total and the next multiple of ten (60 - 56 = 4).

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 → 10 → 1 + 0

Pos 6

Unchanged

Pos 7

Doubled → 4

Pos 8

Unchanged

Pos 9

Doubled → 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 8 → 16 → 7 5 → 10 → 1 2 → 4 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 9 + 1 + 6 + 2 + 1 + 0 + 4 + 4 + 3 + 0 + 24 = 56

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

The next multiple of ten after 56 is 60. The difference is the calculated check digit.

60 - 56 = 4

This NPI is valid

The calculated check digit is 4, which matches the last digit of 1982542304.