MATT CHRISTOPHER MCCARTHY LCPC
NPI 1821716309
Counselor - Professional in Chicago, IL

NPI Status: Active since August 19, 2022

Contact Information

1502 W CHICAGO AVE
CHICAGO, IL
ZIP 60642
Phone: (312) 339-8604

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

Individual
Male
Counselor
Professional

About MATT MCCARTHY

This page provides the complete NPI Profile along with additional information for Matt Mccarthy, a provider established in Chicago, Illinois with a medical specialization in Counselor, focusing in professional . The healthcare provider is registered in the NPI registry with number 1821716309 assigned on August 2022. The practitioner's primary taxonomy code is 101YP2500X with license number 180016882 (IL). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI: 1821716309
Provider Name: MATT CHRISTOPHER MCCARTHY LCPC
Gender: Male
Entity Type: Individual
Location Address: 1502 W CHICAGO AVE CHICAGO, IL 60642
Location Phone: (312) 339-8604
Mailing Address: 2015 W CRYSTAL ST APT 3F CHICAGO, IL 60622
Is Sole Proprietor?: No
Enumeration Date: 08-19-2022
Last Update Date: 03-29-2025
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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.: 180016882
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 1821716309, we treat the final digit (9) 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 51. The final step is to find the difference between that total and the next multiple of ten (60 - 51 = 9).

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 → 4

Pos 4

Unchanged

Pos 5

Doubled → 14 → 1 + 4

Pos 6

Unchanged

Pos 7

Doubled → 12 → 1 + 2

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 2 → 4 7 → 14 → 5 6 → 12 → 3 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 4 + 1 + 1 + 4 + 1 + 1 + 2 + 3 + 0 + 24 = 51

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

The next multiple of ten after 51 is 60. The difference is the calculated check digit.

60 - 51 = 9

This NPI is valid

The calculated check digit is 9, which matches the last digit of 1821716309.