MARY FLANAGAN
NPI 1073451183
Emergency Medicine in Chicago, IL

NPI Status: Active since March 23, 2026

Contact Information

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

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

Individual
Female
Emergency Medicine

About MARY FLANAGAN

This page provides the complete NPI Profile along with additional information for Mary Flanagan, a provider established in Chicago, Illinois with a medical specialization in Emergency Medicine. The healthcare provider is registered in the NPI registry with number 1073451183 assigned on March 2026. The practitioner's primary taxonomy code is 207P00000X with license number NA (IL). The provider is registered as an individual and her NPI record was last updated March 2026.

NPI: 1073451183
Provider Name: MARY FLANAGAN
Other Name: MARY FLANAGAN BELLOLI
Other Name Type: Other Name (5)
Gender: Female
Entity Type: Individual
Location Address: 820 S WOOD ST STE 100 CHICAGO, IL 60612
Location Phone: (312) 996-2933
Mailing Address: 820 S WOOD ST STE 100 CHICAGO, IL 60612
Mailing Phone: (312) 996-2933
Is Sole Proprietor?: No
Enumeration Date: 03-23-2026
Last Update Date: 03-23-2026
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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: Emergency Medicine
Taxonomy Code: 207P00000X
Type: Allopathic & Osteopathic Physicians
License No.: NA
License State: IL
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.

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 1073451183, 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 → 14 → 1 + 4

Pos 4

Unchanged

Pos 5

Doubled → 8

Pos 6

Unchanged

Pos 7

Doubled → 2

Pos 8

Unchanged

Pos 9

Doubled → 16 → 1 + 6

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 7 → 14 → 5 4 → 8 1 → 2 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 1 + 4 + 3 + 8 + 5 + 2 + 1 + 1 + 6 + 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 1073451183.