KATHERINE FAGIN
NPI 1841123445
Counselor - Professional in Fenton, MO

NPI Status: Active since June 04, 2026

Contact Information

558 GRAVOIS RD STE L100
FENTON, MO
ZIP 63026
Phone: (636) 333-2641

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  • Individual
  • Counselor
  • Professional

About KATHERINE FAGIN

This page provides the complete NPI Profile along with additional information for Katherine Fagin, a provider established in Fenton, Missouri operating as a Counselor, focusing in professional . The healthcare provider is registered in the NPI registry with number 1841123445 assigned on June 2026. The practitioner's primary taxonomy code is 101YP2500X. The provider is registered as an individual and their NPI record was last updated June 2026.

NPI
1841123445
Provider Name
KATHERINE FAGIN
Gender
Entity Type
Individual
Location Address
558 GRAVOIS RD STE L100 FENTON, MO 63026
Location Phone
(636) 333-2641
Mailing Address
558 GRAVOIS RD STE L100 FENTON, MO 63026
Is Sole Proprietor?
No
Enumeration Date
06-04-2026
Last Update Date
06-04-2026
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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

Counselor Professional

Taxonomy Code
101YP2500X
Type
Behavioral Health & Social Service Providers

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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 1841123445, 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 65. The final step is to find the difference between that total and the next multiple of ten (70 - 65 = 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.

Pos 1
1
Doubled → 2
Pos 2
8
Unchanged
Pos 3
4
Doubled → 8
Pos 4
1
Unchanged
Pos 5
1
Doubled → 2
Pos 6
2
Unchanged
Pos 7
3
Doubled → 6
Pos 8
4
Unchanged
Pos 9
4
Doubled → 8
Check
5
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 3 → 6 4 → 8

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 8 + 1 + 2 + 2 + 6 + 4 + 8 + 24 = 65

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

The next multiple of ten after 65 is 70. The difference is the calculated check digit.

70 - 65 = 5
This NPI is valid
The calculated check digit is 5, which matches the last digit of 1841123445.

Other Providers at the Same Location


The following 2 providers are registered at the same or a nearby location.

Counselor
558 GRAVOIS RD STE L100
FENTON, MO 63026
Counselor (Professional)
558 GRAVOIS RD STE L100
FENTON, MO 63026

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1841123445, enumerated as an "individual" on June 04, 2026.

The provider is located at 558 GRAVOIS RD STE L100 FENTON, MO 63026 and the phone number is (636) 333-2641.

Counselor with taxonomy code 101YP2500X and a focus in Professional.