MACKENZIE ANNE O'CONNOR
NPI 1801421516
Otolaryngology in Chicago, IL

NPI Status: Active since March 03, 2020

Contact Information

1611 W HARRISON ST STE 550
CHICAGO, IL
ZIP 60612
Phone: (312) 942-6100

Recently Updated NPI Information
Some details in this NPI profile have been updated in the NPI registry within the last 30 days.

Table of Contents

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

Individual
Female
Otolaryngology

About MACKENZIE O'CONNOR

This page provides the complete NPI Profile along with additional information for Mackenzie O'connor, a provider established in Chicago, Illinois with a medical specialization in Otolaryngology. The healthcare provider is registered in the NPI registry with number 1801421516 assigned on March 2020. The practitioner's primary taxonomy code is 207Y00000X with license number 036-180602 (IL). The provider is registered as an individual and her NPI record was last updated June 2026.

NPI: 1801421516
Provider Name: MACKENZIE ANNE O'CONNOR
Gender: Female
Entity Type: Individual
Location Address: 1611 W HARRISON ST STE 550 CHICAGO, IL 60612
Location Phone: (312) 942-6100
Mailing Address: 1611 W HARRISON ST STE 550 CHICAGO, IL 60612
Mailing Phone: (312) 942-6100
Is Sole Proprietor?: No
Enumeration Date: 03-03-2020
Last Update Date: 06-22-2026
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Location Map

Secondary Locations

550 1st Ave
New York, NY 10016
(212) 263-5506

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: Otolaryngology
Taxonomy Code: 207Y00000X
Type: Allopathic & Osteopathic Physicians
License No.: 036-180602
License State: IL
Taxonomy Description: An otolaryngologist-head and neck surgeon provides comprehensive medical and surgical care for patients with diseases and disorders that affect the ears, nose, throat, the respiratory and upper alimentary systems and related structures of the head and neck. An otolaryngologist diagnoses and provides medical and/or surgical therapy or prevention of diseases, allergies, neoplasms, deformities, disorders and/or injuries of the ears, nose, sinuses, throat, respiratory and upper alimentary systems, face, jaws and the other head and neck systems. Head and neck oncology, facial plastic and reconstructive surgery and the treatment of disorders of hearing and voice are fundamental areas of expertise.

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 1801421516, we treat the final digit (6) 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 54. The final step is to find the difference between that total and the next multiple of ten (60 - 54 = 6).

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 → 0

Pos 4

Unchanged

Pos 5

Doubled → 8

Pos 6

Unchanged

Pos 7

Doubled → 2

Pos 8

Unchanged

Pos 9

Doubled → 2

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 0 → 0 4 → 8 1 → 2 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 0 + 1 + 8 + 2 + 2 + 5 + 2 + 24 = 54

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

The next multiple of ten after 54 is 60. The difference is the calculated check digit.

60 - 54 = 6

This NPI is valid

The calculated check digit is 6, which matches the last digit of 1801421516.