DANIEL NEJAK M.D.
NPI 1487069514
Emergency Medicine in Oak Lawn, IL
- Individual
- Male
- Emergency Medicine
About DANIEL NEJAK
This page provides the complete NPI Profile along with additional information for Daniel Nejak, a provider established in Oak Lawn, Illinois with a medical specialization in Emergency Medicine. The healthcare provider is registered in the NPI registry with number 1487069514 assigned on June 2014. The practitioner's primary taxonomy code is 207P00000X with license number 01078681A (IN). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1487069514
- Provider Name
- DANIEL NEJAK M.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 4440 W 95TH ST OAK LAWN, IL 60453
- Location Phone
- (708) 684-5375
- Location Fax
- (708) 684-1028
- Mailing Address
- 1212 S MICHIGAN AVE APARTMENT 1703 CHICAGO, IL 60605
- Is Sole Proprietor?
- No
- Enumeration Date
- 06-27-2014
- Last Update Date
- 09-11-2025
- 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
Emergency Medicine
- Taxonomy Code
- 207P00000X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 01078681A
- License State
- IN
- Taxonomy Description
- An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
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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 1487069514, 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 66. The final step is to find the difference between that total and the next multiple of ten (70 - 66 = 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 66 is 70. 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.
OAK LAWN, IL 60453
OAK LAWN, IL 60453
OAK LAWN, IL 60453
OAK LAWN, IL 60453
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1487069514, enumerated as an "individual" on June 27, 2014.
The provider is located at 4440 W 95TH ST OAK LAWN, IL 60453 and the phone number is (708) 684-5375.
Emergency Medicine with taxonomy code 207P00000X.
