BRETT ANTHONY KOSOWSKI DO
NPI 1942996384
Pediatrics in Peoria, IL
NPI Status: Active since April 17, 2023
Contact Information
530 NE GLEN OAK AVE
PEORIA, IL
ZIP 61637
Phone: (309) 655-7171
Some details in this NPI profile have been updated in the NPI registry within the last 30 days.
NPPES record last updated: July 17, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.
Record update history: Jul 17, 2026, Jul 6, 2026 (2 updates tracked since 2026).
- Individual
- Male
- Pediatrics
About BRETT KOSOWSKI
This page provides the complete NPI Profile along with additional information for Brett Kosowski, a pediatrician established in Peoria, Illinois with a medical specialization in Pediatrics. The healthcare provider is registered in the NPI registry with number 1942996384 assigned on April 2023. The practitioner's primary taxonomy code is 208000000X with license number 036180569 (IL). The provider is registered as an individual and his NPI record was last updated July 2026.
- NPI
- 1942996384
- Provider Name
- BRETT ANTHONY KOSOWSKI DO
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 530 NE GLEN OAK AVE PEORIA, IL 61637
- Location Phone
- (309) 655-7171
- Mailing Address
- 233 JOHN DR BARTLETT, IL 60103
- Mailing Phone
- (630) 965-3519
- Is Sole Proprietor?
- No
- Enumeration Date
- 04-17-2023
- Last Update Date
- 07-17-2026
- Code Navigator
A pediatrician like Brett Kosowski is a physician who has completed a pediatric residency and is board-certified or board-eligible in a pediatric specialty. Pediatric care providers are trained to care for newborns, infants, children and adolescents. A pediatrician could perform physical exams, manage vaccinations, monitor development milestones, diagnose illnesses, infections, injuries or other health problems, etc.
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
Pediatrics
- Taxonomy Code
- 208000000X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 036180569
- License State
- IL
- Taxonomy Description
- A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
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 | 390200000X | Student, Health Care | Student in an Organized Health Care Education/Training Program | (IL) |
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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 1942996384, 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.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
PEORIA, IL 61637
PEORIA, IL 61637
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1942996384, enumerated as an "individual" on April 17, 2023.
The provider is located at 530 NE GLEN OAK AVE PEORIA, IL 61637 and the phone number is (309) 655-7171.
Pediatrics with taxonomy code 208000000X.
