GRETCHEN ELIZABETH RICHARDSON LCSW
NPI 1831334127
Social Worker - Clinical in Wallingford, CT

NPI Status: Active since December 16, 2008

Contact Information

342 GRIEB RD
WALLINGFORD, CT
ZIP 06492
Phone: (203) 640-0178
Fax: (203) 793-7152

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NPPES record last updated: January 18, 2019. Verified against the NPPES registry weekly; last sync: July 12, 2026.

Record update history: Jan 18, 2019, Nov 13, 2015 (2 updates tracked since 2015).

  • Individual
  • Female
  • Social Worker
  • Clinical

About GRETCHEN RICHARDSON

This page provides the complete NPI Profile along with additional information for Gretchen Richardson, a provider established in Wallingford, Connecticut with a medical specialization in Social Worker, focusing in clinical . The healthcare provider is registered in the NPI registry with number 1831334127 assigned on December 2008. The practitioner's primary taxonomy code is 1041C0700X with license number 006456 (CT). The provider is registered as an individual and her NPI record was last updated 8 years ago.

NPI
1831334127
Provider Name
GRETCHEN ELIZABETH RICHARDSON LCSW
Gender
Female
Entity Type
Individual
Location Address
342 GRIEB RD WALLINGFORD, CT 06492
Location Phone
(203) 640-0178
Location Fax
(203) 793-7152
Mailing Address
342 GRIEB RD WALLINGFORD, CT 06492
Mailing Phone
(203) 640-0178
Mailing Fax
(203) 793-7152
Is Sole Proprietor?
No
Enumeration Date
12-16-2008
Last Update Date
01-18-2019
Code Navigator

A clinical social worker like Gretchen Richardson 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 No.
006456
License State
CT
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.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1101YA0400XBehavioral Health & Social Service Providers

Counselor
Addiction (Substance Use Disorder)

006456 (CT)
2101YM0800XBehavioral Health & Social Service Providers

Counselor
Mental Health

006456 (CT)
3104100000XBehavioral Health & Social Service Providers

Social Worker

006456 (CT)

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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 1831334127, we treat the final digit (7) 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 63. The final step is to find the difference between that total and the next multiple of ten (70 - 63 = 7).

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
8
Unchanged
Pos 3
3
Doubled → 6
Pos 4
1
Unchanged
Pos 5
3
Doubled → 6
Pos 6
3
Unchanged
Pos 7
4
Doubled → 8
Pos 8
1
Unchanged
Pos 9
2
Doubled → 4
Check
7
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 3 → 6 3 → 6 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 + 8 + 6 + 1 + 6 + 3 + 8 + 1 + 4 + 24 = 63

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

The next multiple of ten after 63 is 70. The difference is the calculated check digit.

70 - 63 = 7
This NPI is valid
The calculated check digit is 7, which matches the last digit of 1831334127.

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1831334127, enumerated as an "individual" on December 16, 2008.

The provider is located at 342 GRIEB RD WALLINGFORD, CT 06492 and the phone number is (203) 640-0178.

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