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

CHARLIE ALEXANDRA LEAHEY LMSW
NPI 1689463812
Social Worker in Oxford, CT

Active since May 05, 2025
350 CENTER ROCK GRN STE 10E, OXFORD, CT 06478(475) 349-2129 Get Directions Write a Review

NPPES record last updated: June 24, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Oct 9, 2025, Aug 6, 2025, May 30, 2025 and 1 more (4 updates tracked since 2025).

  • Individual
  • Female
  • Social Worker

About CHARLIE LEAHEY

This page provides the complete NPI Profile along with additional information for Charlie Leahey, a provider established in Oxford, Connecticut with a medical specialization in Social Worker. The healthcare provider is registered in the NPI registry with number 1689463812 assigned on May 2025. The practitioner's primary taxonomy code is 104100000X with license number 10959 (CT). The provider is registered as an individual and her NPI record was last updated June 2026.

NPI
1689463812
Provider Name
CHARLIE ALEXANDRA LEAHEY LMSW
Gender
Female
Entity Type
Individual
Location Address
350 CENTER ROCK GRN STE 10E OXFORD, CT 06478
Location Phone
(475) 349-2129
Mailing Address
350 CENTER ROCK GRN STE 10E OXFORD, CT 06478
Mailing Phone
(475) 349-2129
Is Sole Proprietor?
No
Enumeration Date
05-05-2025
Last Update Date
06-24-2026
Code Navigator

A social worker like Charlie Leahey 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.
10959
License State
CT
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.

Reviews for CHARLIE ALEXANDRA LEAHEY LMSW

There are currently no reviews for this provider. Be the first person to share your experience with this provider by filling out our review form. Your insights are appreciated and will help others make informed decisions.

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 1689463812, we treat the final digit (2) 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 78. The final step is to find the difference between that total and the next multiple of ten (80 - 78 = 2).

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
6
Unchanged
Pos 3
8
Doubled → 16 → 1 + 6
Pos 4
9
Unchanged
Pos 5
4
Doubled → 8
Pos 6
6
Unchanged
Pos 7
3
Doubled → 6
Pos 8
8
Unchanged
Pos 9
1
Doubled → 2
Check
2
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 8 → 16 → 7 4 → 8 3 → 6 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 1 + 6 + 9 + 8 + 6 + 6 + 8 + 2 + 24 = 78

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

The next multiple of ten after 78 is 80. The difference is the calculated check digit.

80 - 78 = 2
This NPI is valid
The calculated check digit is 2, which matches the last digit of 1689463812.

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1689463812, enumerated as an "individual" on May 05, 2025.

The provider is located at 350 CENTER ROCK GRN STE 10E OXFORD, CT 06478 and the phone number is (475) 349-2129.

Social Worker with taxonomy code 104100000X.