JOSEPH D FAGAN
NPI 1770201238
Social Worker in Tonawanda, NY

NPI Status: Active since August 19, 2022

Contact Information

1370 NIAGARA FALLS BLVD
TONAWANDA, NY
ZIP 14150
Phone: (716) 833-3792

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

Individual
Male
Social Worker

About JOSEPH FAGAN

This page provides the complete NPI Profile along with additional information for Joseph Fagan, a provider established in Tonawanda, New York with a medical specialization in Social Worker. The healthcare provider is registered in the NPI registry with number 1770201238 assigned on August 2022. The practitioner's primary taxonomy code is 104100000X with license number 128666 (NY). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI: 1770201238
Provider Name: JOSEPH D FAGAN
Gender: Male
Entity Type: Individual
Location Address: 1370 NIAGARA FALLS BLVD TONAWANDA, NY 14150
Location Phone: (716) 833-3792
Mailing Address: 55 DODGE RD GETZVILLE, NY 14068
Mailing Phone: (716) 831-2700
Is Sole Proprietor?: No
Enumeration Date: 08-19-2022
Last Update Date: 09-23-2025
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A social worker like Joseph Fagan helps patients solve and cope with problems in their everyday lives, diagnoses and treats mental, behavioral, and emotional problems. Social workers help in wide range of situations, such as adopting a child, illness, divorce, or unemployment.

Location Map

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: Social Worker
Taxonomy Code: 104100000X
Type: Behavioral Health & Social Service Providers
License No.: 128666
License State: NY
Taxonomy Description: A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.

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 1770201238, we treat the final digit (8) 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 52. The final step is to find the difference between that total and the next multiple of ten (60 - 52 = 8).

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 → 4

Pos 6

Unchanged

Pos 7

Doubled → 2

Pos 8

Unchanged

Pos 9

Doubled → 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 2 → 4 1 → 2 3 → 6

Step 2: Add all digits plus the NPI constant

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

2 + 7 + 1 + 4 + 0 + 4 + 0 + 2 + 2 + 6 + 24 = 52

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

The next multiple of ten after 52 is 60. The difference is the calculated check digit.

60 - 52 = 8

This NPI is valid

The calculated check digit is 8, which matches the last digit of 1770201238.