ADVOCATE HEALTH AND HOSPITALS CORPORATION
NPI 1639940588
Clinic/Center - Multi-Specialty in Chicago, IL
NPI Status: Active since January 10, 2024
Contact Information
4025 N WESTERN AVE
CHICAGO, IL
ZIP 60618
Phone: (847) 384-3550
- Organization
- Clinic/Center
- Multi-Specialty
- CLIA Number: 14D1019569
- CLIA Cert. Type: Physician Office
- CLIA Exp. Date: 11-20-2025
About ADVOCATE HEALTH AND HOSPITALS CORPORATION
This page provides the complete NPI Profile along with additional information for Advocate Health And Hospitals Corporation, a provider established in Chicago, Illinois operating as a Clinic/center, focusing in multi-specialty . The healthcare provider is registered in the NPI registry with number 1639940588 assigned on January 2024. The practitioner's primary taxonomy code is 261QM1300X. The provider is registered as an organization and their NPI record was last updated January 2026. The provider's
- NPI
- 1639940588
- Provider Legal Name
- ADVOCATE HEALTH AND HOSPITALS CORPORATION
- Other Organization Name
- Other Name Type
- (6)
- Entity Type
- Organization
- Location Address
- 4025 N WESTERN AVE CHICAGO, IL 60618
- Location Phone
- (847) 384-3550
- Mailing Address
- 29373 NETWORK PL CHICAGO, IL 60673
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 01-10-2024
- Last Update Date
- 01-28-2026
- 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 Multi-Specialty
- Taxonomy Code
- 261QM1300X
- Type
- Ambulatory Health Care Facilities
CLIA Information
The Clinical Laboratory Improvement Amendments (CLIA) of 1988 applies to facilities or sites that test human specimens for health assessment or to diagnose, prevent, or treat disease. The CLIA Program sets standards for clinical laboratory testing and issues certificates. The NPI / CLIA crosswalk information for this NPI number is:
- CLIA Number
- 14D1019569
- Facility Type
- Physician Office
- Certificate Effective Date
- November 21, 2023
- Certificate Expiration Date
- November 20, 2025
- Laboratory Director
- GEORGE CZAJKOWSKI M D
- Certificate Type
- Certificate for Provider-Performed Microscopy Procedures (PPMP)
- Certificate Type Description
- This CLIA certificate is issued to Advocate Health And Hospitals Corporation in which a physician, midlevel practitioner or dentist that performs specific microscopy procedures during the course of a patient's visit. A limited list of provider-performed microscopy procedures is included under this certificate type, which are categorized as moderate complexity testing.
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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 1639940588, we treat the final digit (8) 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 72. The final step is to find the difference between that total and the next multiple of ten (80 - 72 = 8).
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 72 is 80. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1639940588, enumerated as an "organization" on January 10, 2024.
The provider is located at 4025 N WESTERN AVE CHICAGO, IL 60618 and the phone number is (847) 384-3550.
Clinic/Center with taxonomy code 261QM1300X and a focus in Multi-Specialty.
