CORNERSTONE SERVICES, INC
NPI 1962369934
Clinic/Center - Mental Health (Including Community Mental Health Center) in Joliet, IL
NPI Status: Active since January 09, 2026
Contact Information
2705 MCDONOUGH ST
JOLIET, IL
ZIP 60436
Phone: (815) 727-6666
Fax: (815) 741-6740
- Organization
- Clinic/Center
- Mental Health (Including Community Menta...
About CORNERSTONE SERVICES, INC
This page provides the complete NPI Profile along with additional information for Cornerstone Services, Inc, a provider established in Joliet, Illinois operating as a Clinic/center, focusing in mental health (including community mental health center) . The healthcare provider is registered in the NPI registry with number 1962369934 assigned on January 2026. The practitioner's primary taxonomy code is 261QM0801X. The provider is registered as an organization and their NPI record was last updated January 2026. The authorized official of this NPI record is Christine Hill (Director Of Finance)
- NPI
- 1962369934
- Provider Name
- CORNERSTONE SERVICES, INC
- Entity Type
- Organization
- Location Address
- 2705 MCDONOUGH ST JOLIET, IL 60436
- Location Phone
- (815) 727-6666
- Location Fax
- (815) 741-6740
- Mailing Address
- 2705 MCDONOUGH ST JOLIET, IL 60436
- Mailing Phone
- (815) 727-6666
- Mailing Fax
- (815) 741-6740
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 01-09-2026
- Last Update Date
- 01-13-2026
- Code Navigator
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
Clinic/Center Mental Health (Including Community Mental Health Center)
- Taxonomy Code
- 261QM0801X
- Type
- Ambulatory Health Care Facilities
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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 1962369934, 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 76. The final step is to find the difference between that total and the next multiple of ten (80 - 76 = 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.
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.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 76 is 80. The difference is the calculated check digit.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1962369934, enumerated as an "organization" on January 09, 2026.
The provider is located at 2705 MCDONOUGH ST JOLIET, IL 60436 and the phone number is (815) 727-6666.
Clinic/Center with taxonomy code 261QM0801X and a focus in Mental Health (Including Community Mental Health Center).
