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

NATHALIE LEONARDO LSW
NPI 1093635419
Social Worker in Princeton, NJ

Active since July 16, 2026
707 ALEXANDER RD STE 102, PRINCETON, NJ 08540(609) 987-8100 Get Directions

NPPES record added: July 16, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

  • Individual
  • Female
  • Social Worker

About NATHALIE LEONARDO

This page provides the complete NPI Profile along with additional information for Nathalie Leonardo, a provider established in Princeton, New Jersey with a medical specialization in Social Worker. The healthcare provider is registered in the NPI registry with number 1093635419 assigned on July 2026. The practitioner's primary taxonomy code is 104100000X with license number 44SL07440100 (NJ). The provider is registered as an individual and her NPI record was last updated July 2026.

NPI
1093635419
Provider Name
NATHALIE LEONARDO LSW
Gender
Female
Entity Type
Individual
Location Address
707 ALEXANDER RD STE 102 PRINCETON, NJ 08540
Location Phone
(609) 987-8100
Mailing Address
214 SUMMER AVE NEWARK, NJ 07104
Mailing Phone
(973) 868-8453
Is Sole Proprietor?
No
Enumeration Date
07-16-2026
Last Update Date
07-16-2026
Code Navigator

A social worker like Nathalie Leonardo 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.
44SL07440100
License State
NJ
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 NATHALIE LEONARDO LSW

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 1093635419, we treat the final digit (9) 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 51. The final step is to find the difference between that total and the next multiple of ten (60 - 51 = 9).

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
0
Unchanged
Pos 3
9
Doubled → 18 → 1 + 8
Pos 4
3
Unchanged
Pos 5
6
Doubled → 12 → 1 + 2
Pos 6
3
Unchanged
Pos 7
5
Doubled → 10 → 1 + 0
Pos 8
4
Unchanged
Pos 9
1
Doubled → 2
Check
9
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 9 → 18 → 9 6 → 12 → 3 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 + 0 + 1 + 8 + 3 + 1 + 2 + 3 + 1 + 0 + 4 + 2 + 24 = 51

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

The next multiple of ten after 51 is 60. The difference is the calculated check digit.

60 - 51 = 9
This NPI is valid
The calculated check digit is 9, which matches the last digit of 1093635419.

Other Providers at the Same Location


The following 7 providers are registered at the same or a nearby location.

Counselor (Mental Health)
707 ALEXANDER RD STE 102
PRINCETON, NJ 08540
Social Worker
707 ALEXANDER RD STE 102
PRINCETON, NJ 08540
Social Worker
707 ALEXANDER RD STE 102
PRINCETON, NJ 08540
Social Worker
707 ALEXANDER RD STE 102
PRINCETON, NJ 08540
Student in an Organized Health Care Education/Training Program
707 ALEXANDER RD STE 102
PRINCETON, NJ 08540
Social Worker (Clinical)
707 ALEXANDER RD STE 102
PRINCETON, NJ 08540
Social Worker (Clinical)
707 ALEXANDER RD STE 102
PRINCETON, NJ 08540

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1093635419, enumerated as an "individual" on July 16, 2026.

The provider is located at 707 ALEXANDER RD STE 102 PRINCETON, NJ 08540 and the phone number is (609) 987-8100.

Social Worker with taxonomy code 104100000X.