WASHINGTON UNIVERSITY PHYSICIANS IN ILLINOIS, INC
NPI 1457203135
Clinic/Center - Multi-Specialty in Saint Louis, MO
NPI Status: Active since February 13, 2026
Contact Information
4901 FOREST PARK AVE STE 341
SAINT LOUIS, MO
ZIP 63108
Phone: (314) 454-8181
Fax: (314) 747-1429
- Organization
- Clinic/Center
- Multi-Specialty
About WASHINGTON UNIVERSITY PHYSICIANS IN ILLINOIS, INC
This page provides the complete NPI Profile along with additional information for Washington University Physicians In Illinois, Inc, a provider established in Saint Louis, Missouri operating as a Clinic/center, focusing in multi-specialty . The healthcare provider is registered in the NPI registry with number 1457203135 assigned on February 2026. The practitioner's primary taxonomy code is 261QM1300X. The provider is registered as an organization and their NPI record was last updated February 2026. The authorized official of this NPI record is Cathy Eghigian (Sr. Director, Managed Care)
- NPI
- 1457203135
- Provider Name
- WASHINGTON UNIVERSITY PHYSICIANS IN ILLINOIS, INC
- Entity Type
- Organization
- Location Address
- 4901 FOREST PARK AVE STE 341 SAINT LOUIS, MO 63108
- Location Phone
- (314) 454-8181
- Location Fax
- (314) 747-1429
- Mailing Address
- PO BOX 7412011 CHICAGO, IL 60674
- Mailing Phone
- (314) 454-8181
- Mailing Fax
- (314) 747-1429
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 02-13-2026
- Last Update Date
- 02-13-2026
- 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 Multi-Specialty
- Taxonomy Code
- 261QM1300X
- 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 1457203135, we treat the final digit (5) 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 55. The final step is to find the difference between that total and the next multiple of ten (60 - 55 = 5).
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 55 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 4 providers are registered at the same or a nearby location.
SAINT LOUIS, MO 63108
SAINT LOUIS, MO 63108
SAINT LOUIS, MO 63108
SAINT LOUIS, MO 63108
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1457203135, enumerated as an "organization" on February 13, 2026.
The provider is located at 4901 FOREST PARK AVE STE 341 SAINT LOUIS, MO 63108 and the phone number is (314) 454-8181.
Clinic/Center with taxonomy code 261QM1300X and a focus in Multi-Specialty.
