MRS. HAYLEY NASRALLAH MA
NPI 1891395026
Counselor - Professional in Roanoke, VA
NPI Status: Active since October 27, 2020
Contact Information
223 ALBEMARLE AVE SW
ROANOKE, VA
ZIP 24016
Phone: (540) 227-0045
Fax: (540) 779-7499
- Individual
- Female
- Counselor
- Professional
About HAYLEY NASRALLAH
This page provides the complete NPI Profile along with additional information for Hayley Nasrallah, a provider established in Roanoke, Virginia with a medical specialization in Counselor, focusing in professional . The healthcare provider is registered in the NPI registry with number 1891395026 assigned on October 2020. The practitioner's primary taxonomy code is 101YP2500X with license number 8702 (CA). The provider is registered as an individual and her NPI record was last updated one year ago.
- NPI
- 1891395026
- Provider Name
- MRS. HAYLEY NASRALLAH MA
- Other Name
- HAYLEY OOSTHUYSEN
- Other Name Type
- Former Name (1)
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 223 ALBEMARLE AVE SW ROANOKE, VA 24016
- Location Phone
- (540) 227-0045
- Location Fax
- (540) 779-7499
- Mailing Address
- 223 ALBEMARLE AVE SW ROANOKE, VA 24016
- Mailing Phone
- (540) 227-0045
- Mailing Fax
- (540) 779-7499
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 10-27-2020
- 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.
- 8702
- License State
- CA
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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 1891395026, we treat the final digit (6) 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 64. The final step is to find the difference between that total and the next multiple of ten (70 - 64 = 6).
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 64 is 70. The difference is the calculated check digit.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1891395026, enumerated as an "individual" on October 27, 2020.
The provider is located at 223 ALBEMARLE AVE SW ROANOKE, VA 24016 and the phone number is (540) 227-0045.
Counselor with taxonomy code 101YP2500X and a focus in Professional.
