NDUBISI ONAH JR. MD
NPI 1750945143
Urology in Chicago, IL

NPI Status: Active since May 01, 2019

Contact Information

820 S WOOD ST STE 100
CHICAGO, IL
ZIP 60612
Phone: (312) 996-2933
Fax: (312) 996-3050

NPI Profile Information
Primary Taxonomy
Secondary Taxonomies
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Urology

About NDUBISI ONAH

This page provides the complete NPI Profile along with additional information for Ndubisi Onah, a provider established in Chicago, Illinois with a medical specialization in Urology. The healthcare provider is registered in the NPI registry with number 1750945143 assigned on May 2019. The practitioner's primary taxonomy code is 208800000X with license number 125.079965 (IL). The provider is registered as an individual and his NPI record was last updated 4 years ago.

NPI: 1750945143
Provider Name: NDUBISI ONAH JR. MD
Gender: Male
Entity Type: Individual
Location Address: 820 S WOOD ST STE 100 CHICAGO, IL 60612
Location Phone: (312) 996-2933
Location Fax: (312) 996-3050
Mailing Address: 820 S WOOD ST STE 100 CHICAGO, IL 60612
Is Sole Proprietor?: Yes
Enumeration Date: 05-01-2019
Last Update Date: 12-07-2022
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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: Urology
Taxonomy Code: 208800000X
Type: Allopathic & Osteopathic Physicians
License No.: 125.079965
License State: IL
Taxonomy Description: A urologist manages benign and malignant medical and surgical disorders of the genitourinary system and the adrenal gland. This specialist has comprehensive knowledge of and skills in endoscopic, percutaneous and open surgery of congenital and acquired conditions of the urinary and reproductive systems and their contiguous structures.

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)

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 1750945143, we treat the final digit (3) 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 57. The final step is to find the difference between that total and the next multiple of ten (60 - 57 = 3).

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.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 10 → 1 + 0

Pos 4

Unchanged

Pos 5

Doubled → 18 → 1 + 8

Pos 6

Unchanged

Pos 7

Doubled → 10 → 1 + 0

Pos 8

Unchanged

Pos 9

Doubled → 8

Check

Target digit

Regular digit Doubled digit Check digit

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.

1 → 2 5 → 10 → 1 9 → 18 → 9 5 → 10 → 1 4 → 8

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 7 + 1 + 0 + 0 + 1 + 8 + 4 + 1 + 0 + 1 + 8 + 24 = 57

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 57 is 60. The difference is the calculated check digit.

60 - 57 = 3

This NPI is valid

The calculated check digit is 3, which matches the last digit of 1750945143.