ELIEZER DIAZ D.O.
NPI 1972496925
General Practice in Chicago, IL
NPI Status: Active since May 29, 2025
Contact Information
5145 N CALIFORNIA AVE
CHICAGO, IL
ZIP 60625
Phone: (773) 989-3808
- Individual
- Male
- General Practice
About ELIEZER DIAZ
This page provides the complete NPI Profile along with additional information for Eliezer Diaz, a primary care provider established in Chicago, Illinois with a medical specialization in General Practice. The healthcare provider is registered in the NPI registry with number 1972496925 assigned on May 2025. The practitioner's primary taxonomy code is 208D00000X with license number 125.086198 (IL). The provider is registered as an individual and his NPI record was last updated December 2025.
- NPI
- 1972496925
- Provider Name
- ELIEZER DIAZ D.O.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 5145 N CALIFORNIA AVE CHICAGO, IL 60625
- Location Phone
- (773) 989-3808
- Mailing Address
- 5145 N CALIFORNIA AVE CHICAGO, IL 60625
- Mailing Phone
- (773) 989-3808
- Is Sole Proprietor?
- No
- Enumeration Date
- 05-29-2025
- Last Update Date
- 12-16-2025
- Code Navigator
A primary care provider (PCP) like Eliezer Diaz sees people with common medical problems. The primary care provider might be a doctor, physician assistant, nurse practitioner or clinic that are usually involved in your long-term care. A PCP might provide preventive care, treat common medical conditions, identify urgent medical problems and refer you to specialists when necessary. Primary care is usually provided in an outpatient facility but if you are admitted to a hospital your PCP may assist in your care. The most common medical conditions seen by primary care providers are: hypertension, upper respiratory tract infections, depression or anxiety, back pain, arthritis, dermatitis, diabetes, urinary tract infections, 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
General Practice
- Taxonomy Code
- 208D00000X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 125.086198
- License State
- IL
- Taxonomy Description
- A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. Source: National Uniform Claim Committee
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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 1972496925, 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 75. The final step is to find the difference between that total and the next multiple of ten (80 - 75 = 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 75 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.
CHICAGO, IL 60625
CHICAGO, IL 60625
CHICAGO, IL 60625
CHICAGO, IL 60625
CHICAGO, IL 60625
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1972496925, enumerated as an "individual" on May 29, 2025.
The provider is located at 5145 N CALIFORNIA AVE CHICAGO, IL 60625 and the phone number is (773) 989-3808.
General Practice with taxonomy code 208D00000X.
