MICHAEL G HAHN B.S.
NPI 1144112707
Clinic/Center - Medical Specialty in Saint Louis, MO

NPI Status: Active since July 17, 2025

Contact Information

1008 S SPRING AVE
SAINT LOUIS, MO
ZIP 63110
Phone: (314) 617-3955

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

Individual
Male
Clinic/Center
Medical Specialty

About MICHAEL HAHN

This page provides the complete NPI Profile along with additional information for Michael Hahn, a provider established in Saint Louis, Missouri with a medical specialization in Clinic/center, focusing in medical specialty . The healthcare provider is registered in the NPI registry with number 1144112707 assigned on July 2025. The practitioner's primary taxonomy code is 261QM2500X. The provider is registered as an individual and his NPI record was last updated March 2026.

NPI: 1144112707
Provider Name: MICHAEL G HAHN B.S.
Gender: Male
Entity Type: Individual
Location Address: 1008 S SPRING AVE SAINT LOUIS, MO 63110
Location Phone: (314) 617-3955
Mailing Address: 809 N CLEVELAND ST LITTLE ROCK, AR 72205
Mailing Phone: (479) 685-0828
Is Sole Proprietor?: Yes
Enumeration Date: 07-17-2025
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: Clinic/Center Medical Specialty
Taxonomy Code: 261QM2500X
Type: Ambulatory Health Care Facilities
Taxonomy Description: An entity, facility, or distinct part of a facility providing diagnostic, treatment, and prescriptive services related to a specific area of medical specialization. Frequently used for Title V related Children's Specialty services or to meet specific public health needs (e.g., infectious diseases or breast and cervical cancer).

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 1144112707, we treat the final digit (7) 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 53. The final step is to find the difference between that total and the next multiple of ten (60 - 53 = 7).

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 → 8

Pos 4

Unchanged

Pos 5

Doubled → 2

Pos 6

Unchanged

Pos 7

Doubled → 4

Pos 8

Unchanged

Pos 9

Doubled → 0

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 4 → 8 1 → 2 2 → 4 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 8 + 4 + 2 + 1 + 4 + 7 + 0 + 24 = 53

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

The next multiple of ten after 53 is 60. The difference is the calculated check digit.

60 - 53 = 7

This NPI is valid

The calculated check digit is 7, which matches the last digit of 1144112707.