DR. MARY TROTTY NICKSON PH.D.
NPI 1245459189
Counselor - Professional in Allen, TX
NPI Status: Active since April 25, 2007
Contact Information
100 ALLENTOWN PKWY
#114
ALLEN, TX
ZIP 75002
Phone: (972) 747-0059
- Individual
- Female
- Counselor
- Professional
About MARY NICKSON
This page provides the complete NPI Profile along with additional information for Mary Nickson, a provider established in Allen, Texas with a medical specialization in Counselor, focusing in professional . The healthcare provider is registered in the NPI registry with number 1245459189 assigned on April 2007. The practitioner's primary taxonomy code is 101YP2500X with license number 11170 (TX). The provider is registered as an individual and her NPI record was last updated one year ago.
- NPI
- 1245459189
- Provider Name
- DR. MARY TROTTY NICKSON PH.D.
- Other Name
- MISS MARY ELIZABETH TROTTY
- Other Name Type
- Former Name (1)
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 100 ALLENTOWN PKWY #114 ALLEN, TX 75002
- Location Phone
- (972) 747-0059
- Mailing Address
- 807 RIDGEMONT DR ALLEN, TX 75002
- Mailing Phone
- (972) 396-1970
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 04-25-2007
- Last Update Date
- 09-11-2025
- Code Navigator
Location Map
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
- License No.
- 11170
- License State
- TX
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) |
|---|---|---|---|---|
| 1 | 103TC1900X | Behavioral Health & Social Service Providers | Psychologist | 25148 (TX) |
| 2 | 103TS0200X | Behavioral Health & Social Service Providers | Psychologist | 30454 (TX) |
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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 1245459189, we treat the final digit (9) 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 71. The final step is to find the difference between that total and the next multiple of ten (80 - 71 = 9).
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.
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.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 71 is 80. The difference is the calculated check digit.
Other Providers at the Same Location
The following 6 providers are registered at the same or a nearby location.
ALLEN, TX 75002
ALLEN, TX 75002
ALLEN, TX 75002
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1245459189, enumerated as an "individual" on April 25, 2007.
The provider is located at 100 ALLENTOWN PKWY #114 ALLEN, TX 75002 and the phone number is (972) 747-0059.
Counselor with taxonomy code 101YP2500X and a focus in Professional.
