MALLORY M WILLISTON BA
NPI 1598461378
Counselor - Professional in Pawcatuck, CT

NPI Status: Active since February 03, 2023

Contact Information

38 S BROAD ST
PAWCATUCK, CT
ZIP 06379
Phone: (860) 437-4550
Fax: (860) 661-4262

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  • Individual
  • Female
  • Counselor
  • Professional

About MALLORY WILLISTON

This page provides the complete NPI Profile along with additional information for Mallory Williston, a provider established in Pawcatuck, Connecticut with a medical specialization in Counselor, focusing in professional . The healthcare provider is registered in the NPI registry with number 1598461378 assigned on February 2023. The practitioner's primary taxonomy code is 101YP2500X. The provider is registered as an individual and her NPI record was last updated 3 years ago.

NPI
1598461378
Provider Name
MALLORY M WILLISTON BA
Gender
Female
Entity Type
Individual
Location Address
38 S BROAD ST PAWCATUCK, CT 06379
Location Phone
(860) 437-4550
Location Fax
(860) 661-4262
Mailing Address
PO BOX 120 NEW LONDON, CT 06320
Mailing Phone
(860) 437-4550
Mailing Fax
(860) 661-4262
Is Sole Proprietor?
Yes
Enumeration Date
02-03-2023
Last Update Date
02-03-2023
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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

Counselor Professional

Taxonomy Code
101YP2500X
Type
Behavioral Health & Social Service Providers

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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 1598461378, we treat the final digit (8) 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 72. The final step is to find the difference between that total and the next multiple of ten (80 - 72 = 8).

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
5
Unchanged
Pos 3
9
Doubled → 18 → 1 + 8
Pos 4
8
Unchanged
Pos 5
4
Doubled → 8
Pos 6
6
Unchanged
Pos 7
1
Doubled → 2
Pos 8
3
Unchanged
Pos 9
7
Doubled → 14 → 1 + 4
Check
8
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 4 → 8 1 → 2 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

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

2 + 5 + 1 + 8 + 8 + 8 + 6 + 2 + 3 + 1 + 4 + 24 = 72

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

The next multiple of ten after 72 is 80. The difference is the calculated check digit.

80 - 72 = 8
This NPI is valid
The calculated check digit is 8, which matches the last digit of 1598461378.

Other Providers at the Same Location


The following 3 providers are registered at the same or a nearby location.

Marriage & Family Therapist
38 S BROAD ST
PAWCATUCK, CT 06379
Marriage & Family Therapist
38 S BROAD ST
PAWCATUCK, CT 06379
Social Worker (Clinical)
38 S BROAD ST
PAWCATUCK, CT 06379

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1598461378, enumerated as an "individual" on February 03, 2023.

The provider is located at 38 S BROAD ST PAWCATUCK, CT 06379 and the phone number is (860) 437-4550.

Counselor with taxonomy code 101YP2500X and a focus in Professional.