GERTHY C PIERRE LLC
NPI 1821746421
Clinic/Center - Mental Health (Including Community Mental Health Center) in O Fallon, IL
NPI Status: Active since March 13, 2022
Contact Information
9 EAGLE CTR STE 3
O FALLON, IL
ZIP 62269
Phone: (618) 954-7434
Fax: (888) 533-1766
- Organization
- Clinic/Center
- Mental Health (Including Community Menta...
About GERTHY C PIERRE LLC
This page provides the complete NPI Profile along with additional information for Gerthy C Pierre Llc, a provider established in O Fallon, 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 1821746421 assigned on March 2022. The practitioner's primary taxonomy code is 261QM0801X. The provider is registered as an organization and their NPI record was last updated March 2026. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization. The provider's
- NPI
- 1821746421
- Provider Legal Name
- GERTHY C PIERRE LLC
- Other Organization Name
- Other Name Type
- (6)
- Entity Type
- Organization
- Location Address
- 9 EAGLE CTR STE 3 O FALLON, IL 62269
- Location Phone
- (618) 954-7434
- Location Fax
- (888) 533-1766
- Mailing Address
- 1706 CLOVERDALE DR EDWARDSVILLE, IL 62025
- Mailing Phone
- (618) 954-7434
- Mailing Fax
- (888) 533-1766
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 03-13-2022
- Last Update Date
- 03-02-2026
- Code Navigator
Location Map
Secondary Locations
- 3929 Magnolia Ave Apt 4A
Saint Louis, MO 63110
(618) 954-7434
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
Secondary Taxonomies
The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.
| No. | Taxonomy Code | Type | Classification / Specialization |
License No. (State) |
|---|---|---|---|---|
| 1 | 363LF0000X | Physician Assistants & Advanced Practice Nursing Providers | Nurse Practitioner |
Group Taxonomy 193400000X SINGLE SPECIALTY GROUP
This provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.
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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 1821746421, we treat the final digit (1) 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 59. The final step is to find the difference between that total and the next multiple of ten (60 - 59 = 1).
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 59 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 2 providers are registered at the same or a nearby location.
O FALLON, IL 62269
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1821746421, enumerated as an "organization" on March 13, 2022.
The provider is located at 9 EAGLE CTR STE 3 O FALLON, IL 62269 and the phone number is (618) 954-7434.
Clinic/Center with taxonomy code 261QM0801X and a focus in Mental Health (Including Community Mental Health Center).
