THERESA MARY SZYKULSKI HARRINGTON SLP
NPI 1568388064
Speech-Language Pathologist in Apple Valley, MN

NPI Status: Active since June 29, 2026

Contact Information

4794 141ST ST W
APPLE VALLEY, MN
ZIP 55124
Phone: (952) 412-0829

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  • Individual
  • Female
  • Speech-Language Pathologist

About THERESA SZYKULSKI HARRINGTON

This page provides the complete NPI Profile along with additional information for Theresa Szykulski Harrington, a provider established in Apple Valley, Minnesota with a medical specialization in Speech-language Pathologist. The healthcare provider is registered in the NPI registry with number 1568388064 assigned on June 2026. The practitioner's primary taxonomy code is 235Z00000X with license number 298244 (MN). The provider is registered as an individual and her NPI record was last updated June 2026.

NPI
1568388064
Provider Name
THERESA MARY SZYKULSKI HARRINGTON SLP
Gender
Female
Entity Type
Individual
Location Address
4794 141ST ST W APPLE VALLEY, MN 55124
Location Phone
(952) 412-0829
Mailing Address
4794 141ST ST W APPLE VALLEY, MN 55124
Mailing Phone
(952) 412-0829
Is Sole Proprietor?
Yes
Enumeration Date
06-29-2026
Last Update Date
06-29-2026
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Location Map

Secondary Locations

  • 1350 W 106th St
    Bloomington, MN 55431
    (952) 681-6400

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.
298244
License State
MN
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.

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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 1568388064, we treat the final digit (4) 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 66. The final step is to find the difference between that total and the next multiple of ten (70 - 66 = 4).

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
6
Doubled → 12 → 1 + 2
Pos 4
8
Unchanged
Pos 5
3
Doubled → 6
Pos 6
8
Unchanged
Pos 7
8
Doubled → 16 → 1 + 6
Pos 8
0
Unchanged
Pos 9
6
Doubled → 12 → 1 + 2
Check
4
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 6 → 12 → 3 3 → 6 8 → 16 → 7 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 5 + 1 + 2 + 8 + 6 + 8 + 1 + 6 + 0 + 1 + 2 + 24 = 66

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

The next multiple of ten after 66 is 70. The difference is the calculated check digit.

70 - 66 = 4
This NPI is valid
The calculated check digit is 4, which matches the last digit of 1568388064.

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1568388064, enumerated as an "individual" on June 29, 2026.

The provider is located at 4794 141ST ST W APPLE VALLEY, MN 55124 and the phone number is (952) 412-0829.

Speech-Language Pathologist with taxonomy code 235Z00000X.