MADELINE FIRKSER LMSW
NPI 1619776689
Social Worker in New York, NY

NPI Status: Active since March 11, 2025

Contact Information

555 BROOME ST
NEW YORK, NY
ZIP 10013
Phone: (212) 941-9090

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  • Individual
  • Social Worker

About MADELINE FIRKSER

This page provides the complete NPI Profile along with additional information for Madeline Firkser, a provider established in New York, New York operating as a Social Worker. The healthcare provider is registered in the NPI registry with number 1619776689 assigned on March 2025. The practitioner's primary taxonomy code is 104100000X with license number 124477 (NY). The provider is registered as an individual and their NPI record was last updated one year ago.

NPI
1619776689
Provider Name
MADELINE FIRKSER LMSW
Gender
Entity Type
Individual
Location Address
555 BROOME ST NEW YORK, NY 10013
Location Phone
(212) 941-9090
Mailing Address
1490 BEDFORD AVE APT 1S BROOKLYN, NY 11216
Is Sole Proprietor?
No
Enumeration Date
03-11-2025
Last Update Date
03-11-2025
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A social worker like Madeline Firkser 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.
124477
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.

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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 1619776689, 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 71. The final step is to find the difference between that total and the next multiple of ten (80 - 71 = 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
6
Unchanged
Pos 3
1
Doubled → 2
Pos 4
9
Unchanged
Pos 5
7
Doubled → 14 → 1 + 4
Pos 6
7
Unchanged
Pos 7
6
Doubled → 12 → 1 + 2
Pos 8
6
Unchanged
Pos 9
8
Doubled → 16 → 1 + 6
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 1 → 2 7 → 14 → 5 6 → 12 → 3 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 2 + 9 + 1 + 4 + 7 + 1 + 2 + 6 + 1 + 6 + 24 = 71

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

The next multiple of ten after 71 is 80. The difference is the calculated check digit.

80 - 71 = 9
This NPI is valid
The calculated check digit is 9, which matches the last digit of 1619776689.

Other Providers at the Same Location


The following 6 providers are registered at the same or a nearby location.

Counselor (Mental Health)
555 BROOME ST
NEW YORK, NY 10013
Social Worker (Clinical)
555 BROOME ST
NEW YORK, NY 10013
Social Worker (Clinical)
555 BROOME ST
NEW YORK, NY 10013
Social Worker (Clinical)
555 BROOME ST
NEW YORK, NY 10013
Nurse Practitioner (Primary Care)
555 BROOME ST
NEW YORK, NY 10013
Nurse Practitioner (Pediatrics)
555 BROOME ST
NEW YORK, NY 10013

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1619776689, enumerated as an "individual" on March 11, 2025.

The provider is located at 555 BROOME ST NEW YORK, NY 10013 and the phone number is (212) 941-9090.

Social Worker with taxonomy code 104100000X.