MARGUERITE DRENNAN LCSW
NPI 1922283472
Social Worker - Clinical in Oak Park, IL

NPI Status: Active since January 03, 2008

Contact Information

1140 LAKE ST
SUITE 1140
OAK PARK, IL
ZIP 60301
Phone: (312) 437-0075

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  • Individual
  • Female
  • Social Worker
  • Clinical

About MARGUERITE DRENNAN

This page provides the complete NPI Profile along with additional information for Marguerite Drennan, a provider established in Oak Park, Illinois with a medical specialization in Social Worker, focusing in clinical . The healthcare provider is registered in the NPI registry with number 1922283472 assigned on January 2008. The practitioner's primary taxonomy code is 1041C0700X. The provider is registered as an individual and her NPI record was last updated 18 years ago.

NPI
1922283472
Provider Name
MARGUERITE DRENNAN LCSW
Gender
Female
Entity Type
Individual
Location Address
1140 LAKE ST SUITE 1140 OAK PARK, IL 60301
Location Phone
(312) 437-0075
Mailing Address
1140 LAKE ST SUITE 1140 OAK PARK, IL 60301
Mailing Phone
(312) 437-0075
Is Sole Proprietor?
Yes
Enumeration Date
01-03-2008
Last Update Date
01-03-2008
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A clinical social worker like Marguerite Drennan is licensed to diagnose and treat mental, behavioral, and emotional disorders. A clinical social worker helps patients develop strategies to change behavior or cope with difficult situations and refer patients to other resources or services, such as support groups or other mental health professionals.

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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 Clinical

Taxonomy Code
1041C0700X
Type
Behavioral Health & Social Service Providers
License State
IL
Taxonomy Description
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.

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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 1922283472, 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 68. The final step is to find the difference between that total and the next multiple of ten (70 - 68 = 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
9
Unchanged
Pos 3
2
Doubled → 4
Pos 4
2
Unchanged
Pos 5
2
Doubled → 4
Pos 6
8
Unchanged
Pos 7
3
Doubled → 6
Pos 8
4
Unchanged
Pos 9
7
Doubled → 14 → 1 + 4
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 2 → 4 2 → 4 3 → 6 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

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

2 + 9 + 4 + 2 + 4 + 8 + 6 + 4 + 1 + 4 + 24 = 68

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

The next multiple of ten after 68 is 70. The difference is the calculated check digit.

70 - 68 = 2
This NPI is valid
The calculated check digit is 2, which matches the last digit of 1922283472.

Other Providers at the Same Location


The following 11 providers are registered at the same or a nearby location.

Psychologist (Clinical)
1140 LAKE ST, SUITE 504
OAK PARK, IL 60301
Dentist
1140 LAKE ST, SUITE 503
OAK PARK, IL 60301
Social Worker (Clinical)
1140 LAKE ST, SUITE 302
OAK PARK, IL 60301
Social Worker (Clinical)
1140 LAKE ST, 306
OAK PARK, IL 60301
Social Worker (Clinical)
1140 LAKE ST, SUITE 504
OAK PARK, IL 60301
Social Worker (Clinical)
1140 LAKE ST, SUITE #302
OAK PARK, IL 60301
Acupuncturist
1140 LAKE ST, SUITE 402
OAK PARK, IL 60301
Psychiatry & Neurology (Child & Adolescent Psychiatry)
1140 LAKE ST, SUITE 302
OAK PARK, IL 60301
Internal Medicine
1140 LAKE ST, SUITE 204
OAK PARK, IL 60301
Social Worker (Clinical)
1140 LAKE ST, STE. 401
OAK PARK, IL 60301
Durable Medical Equipment & Medical Supplies (Customized Equipment)
1140 LAKE ST, SUITE 410
OAK PARK, IL 60301

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1922283472, enumerated as an "individual" on January 03, 2008.

The provider is located at 1140 LAKE ST SUITE 1140 OAK PARK, IL 60301 and the phone number is (312) 437-0075.

Social Worker with taxonomy code 1041C0700X and a focus in Clinical.