COLLEEN DUFRESNE SLP
NPI 1639543820
Speech-Language Pathologist in Salem, NH

NPI Status: Active since November 25, 2015

Contact Information

70 BUTLER STREET
SALEM, NH
ZIP 03079
Phone: (603) 893-2900
Fax: (603) 893-1628

NPI Profile Information
Primary Taxonomy
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Female
Speech-Language Pathologist

About COLLEEN DUFRESNE

This page provides the complete NPI Profile along with additional information for Colleen Dufresne, a provider established in Salem, New Hampshire with a medical specialization in Speech-language Pathologist. The healthcare provider is registered in the NPI registry with number 1639543820 assigned on November 2015. The practitioner's primary taxonomy code is 235Z00000X with license number 8040 (MA). The provider is registered as an individual and her NPI record was last updated 11 years ago.

NPI: 1639543820
Provider Name: COLLEEN DUFRESNE SLP
Gender: Female
Entity Type: Individual
Location Address: 70 BUTLER STREET SALEM, NH 03079
Location Phone: (603) 893-2900
Location Fax: (603) 893-1628
Mailing Address: 70 BUTLER STREET SALEM, NH 03079
Mailing Phone: (603) 893-2900
Mailing Fax: (603) 893-1628
Is Sole Proprietor?: No
Enumeration Date: 11-25-2015
Last Update Date: 11-25-2015
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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: Speech-Language Pathologist
Taxonomy Code: 235Z00000X
Type: Speech, Language and Hearing Service Providers
License No.: 8040
License State: MA
Taxonomy Description: The speech-language pathologist is the professional who engages in clinical services, prevention, advocacy, education, administration, and research in the areas of communication and swallowing across the life span from infancy through geriatrics. Speech-language pathologists address typical and atypical impairments and disorders related to communication and swallowing in the areas of speech sound production, resonance, voice, fluency, language (comprehension and expression), cognition, and feeding and swallowing.

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 1639543820, we treat the final digit (0) 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 70. The final step is to find the difference between that total and the next multiple of ten (70 - 70 = 0).

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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 6

Pos 4

Unchanged

Pos 5

Doubled → 10 → 1 + 0

Pos 6

Unchanged

Pos 7

Doubled → 6

Pos 8

Unchanged

Pos 9

Doubled → 4

Check

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 5 → 10 → 1 3 → 6 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 6 + 9 + 1 + 0 + 4 + 6 + 8 + 4 + 24 = 70

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

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

70 - 70 = 0

This NPI is valid

The calculated check digit is 0, which matches the last digit of 1639543820.