OLIVIA GRACE KALIVAS LMSW
NPI 1114874120
Social Worker in West Islip, NY

NPI Status: Active since March 11, 2026

Contact Information

325 SUNRISE HWY
WEST ISLIP, NY
ZIP 11795
Phone: (631) 594-9390

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

Individual
Female
Social Worker

About OLIVIA KALIVAS

This page provides the complete NPI Profile along with additional information for Olivia Kalivas, a provider established in West Islip, New York with a medical specialization in Social Worker. The healthcare provider is registered in the NPI registry with number 1114874120 assigned on March 2026. The practitioner's primary taxonomy code is 104100000X with license number 128838 (NY). The provider is registered as an individual and her NPI record was last updated March 2026.

NPI: 1114874120
Provider Name: OLIVIA GRACE KALIVAS LMSW
Gender: Female
Entity Type: Individual
Location Address: 325 SUNRISE HWY WEST ISLIP, NY 11795
Location Phone: (631) 594-9390
Mailing Address: 205 GREELEY AVE SAYVILLE, NY 11782
Is Sole Proprietor?: Yes
Enumeration Date: 03-11-2026
Last Update Date: 03-11-2026
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A social worker like Olivia Kalivas 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.: 128838
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 1114874120, we treat the final digit (0) 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 60. The final step is to find the difference between that total and the next multiple of ten (60 - 60 = 0).

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 → 2

Pos 4

Unchanged

Pos 5

Doubled → 16 → 1 + 6

Pos 6

Unchanged

Pos 7

Doubled → 8

Pos 8

Unchanged

Pos 9

Doubled → 4

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 1 → 2 8 → 16 → 7 4 → 8 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 2 + 4 + 1 + 6 + 7 + 8 + 1 + 4 + 24 = 60

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

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

60 - 60 = 0

This NPI is valid

The calculated check digit is 0, which matches the last digit of 1114874120.