KATHLEEN COLWELL LMSW
NPI 1669305413
Social Worker in Hicksville, NY

NPI Status: Active since June 03, 2026

Contact Information

950 S OYSTER BAY RD
HICKSVILLE, NY
ZIP 11801
Phone: (516) 822-6188
Fax: (516) 396-0552

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Newly Listed Provider
This NPI profile has been added to the NPI registry within the last 30 days.

Table of Contents

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

Individual
Female
Social Worker

About KATHLEEN COLWELL

This page provides the complete NPI Profile along with additional information for Kathleen Colwell, a provider established in Hicksville, New York with a medical specialization in Social Worker. The healthcare provider is registered in the NPI registry with number 1669305413 assigned on June 2026. The practitioner's primary taxonomy code is 104100000X with license number 131524-01 (NY). The provider is registered as an individual and her NPI record was last updated June 2026.

NPI: 1669305413
Provider Name: KATHLEEN COLWELL LMSW
Gender: Female
Entity Type: Individual
Location Address: 950 S OYSTER BAY RD HICKSVILLE, NY 11801
Location Phone: (516) 822-6188
Location Fax: (516) 396-0552
Mailing Address: 950 S OYSTER BAY RD HICKSVILLE, NY 11801
Mailing Phone: (516) 822-6188
Mailing Fax: (516) 396-0552
Is Sole Proprietor?: No
Enumeration Date: 06-03-2026
Last Update Date: 06-03-2026
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A social worker like Kathleen Colwell 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.

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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: Social Worker
Taxonomy Code: 104100000X
Type: Behavioral Health & Social Service Providers
License No.: 131524-01
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 1669305413, 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 → 12 → 1 + 2

Pos 4

Unchanged

Pos 5

Doubled → 6

Pos 6

Unchanged

Pos 7

Doubled → 10 → 1 + 0

Pos 8

Unchanged

Pos 9

Doubled → 2

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 6 → 12 → 3 3 → 6 5 → 10 → 1 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 + 2 + 9 + 6 + 0 + 1 + 0 + 4 + 2 + 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 1669305413.