MARY CHRISTINE O'BRIEN PSYD
NPI 1649133711
Clinical Neuropsychologist in Lake Grove, NY
NPI Status: Active since December 05, 2025
Contact Information
4 SMITH HAVEN MALL
LAKE GROVE, NY
ZIP 11755
Phone: (631) 444-8053
- Individual
- Female
- Clinical Neuropsychologist
About MARY O'BRIEN
This page provides the complete NPI Profile along with additional information for Mary O'brien, a provider established in Lake Grove, New York with a medical specialization in Clinical Neuropsychologist. The healthcare provider is registered in the NPI registry with number 1649133711 assigned on December 2025. The practitioner's primary taxonomy code is 103G00000X with license number 027770 (NY). The provider is registered as an individual and her NPI record was last updated one year ago.
- NPI
- 1649133711
- Provider Name
- MARY CHRISTINE O'BRIEN PSYD
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 4 SMITH HAVEN MALL LAKE GROVE, NY 11755
- Location Phone
- (631) 444-8053
- Mailing Address
- 96 BAY RD HALESITE, NY 11743
- Is Sole Proprietor?
- No
- Enumeration Date
- 12-05-2025
- Last Update Date
- 12-05-2025
- 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
Clinical Neuropsychologist
- Taxonomy Code
- 103G00000X
- Type
- Behavioral Health & Social Service Providers
- License No.
- 027770
- License State
- NY
- Taxonomy Description
- A clinical psychologist who applies principles of assessment and intervention based upon the scientific study of human behavior as it relates to normal and abnormal functioning of the central nervous system. The specialty is dedicated to enhancing the understanding of brain-behavior relationships and the application of such knowledge to human problems.
Reviews for MARY CHRISTINE O'BRIEN PSYD
There are currently no reviews for this provider. Be the first person to share your experience with this provider by filling out our review form. Your insights are appreciated and will help others make informed decisions.
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 1649133711, we treat the final digit (1) 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 69. The final step is to find the difference between that total and the next multiple of ten (70 - 69 = 1).
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 69 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 10 providers are registered at the same or a nearby location.
LAKE GROVE, NY 11755
LAKE GROVE, NY 11755
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1649133711, enumerated as an "individual" on December 05, 2025.
The provider is located at 4 SMITH HAVEN MALL LAKE GROVE, NY 11755 and the phone number is (631) 444-8053.
Clinical Neuropsychologist with taxonomy code 103G00000X.
