HAKAN AY MD
NPI 1184140162
Psychiatry & Neurology - Vascular Neurology in Charlestown, MA
NPI Status: Active since August 21, 2017
Contact Information
MASS GENERAL HOSPITAL, 13TH STREET
BUILDING 149-2303
CHARLESTOWN, MA
ZIP 02129
Phone: (617) 724-4507
NPPES record last updated: July 21, 2022. Verified against the NPPES registry weekly; last sync: July 12, 2026.
Record update history: Jul 21, 2022, Aug 21, 2017 (2 updates tracked since 2017).
- Individual
- Male
- Psychiatry & Neurology
- Vascular Neurology
About HAKAN AY
This page provides the complete NPI Profile along with additional information for Hakan Ay, a provider established in Charlestown, Massachusetts with a medical specialization in Psychiatry & Neurology, focusing in vascular neurology . The healthcare provider is registered in the NPI registry with number 1184140162 assigned on August 2017. The practitioner's primary taxonomy code is 2084V0102X with license number 91AB030 (ZZ). The provider is registered as an individual and his NPI record was last updated 4 years ago.
- NPI
- 1184140162
- Provider Name
- HAKAN AY MD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- MASS GENERAL HOSPITAL, 13TH STREET BUILDING 149-2303 CHARLESTOWN, MA 02129
- Location Phone
- (617) 724-4507
- Mailing Address
- MASS GENERAL HOSPITAL, 13TH STREET BUILDING 149-2303 CHARLESTOWN, MA 02129
- Mailing Phone
- (617) 724-4507
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 08-21-2017
- Last Update Date
- 07-21-2022
- 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
Psychiatry & Neurology Vascular Neurology
- Taxonomy Code
- 2084V0102X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 91AB030
- License State
- ZZ
- Taxonomy Description
- Vascular Neurology is a subspecialty in the evaluation, prevention, treatment and recovery from vascular diseases of the nervous system. This subspecialty includes the diagnosis and treatment of vascular events of arterial or venous origin from a large number of causes that affect the brain or spinal cord such as ischemic stroke, intracranial hemorrhage, spinal cord ischemia and spinal cord hemorrhage.
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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 1184140162, we treat the final digit (2) 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 48. The final step is to find the difference between that total and the next multiple of ten (50 - 48 = 2).
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 48 is 50. The difference is the calculated check digit.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1184140162, enumerated as an "individual" on August 21, 2017.
The provider is located at MASS GENERAL HOSPITAL, 13TH STREET BUILDING 149-2303 CHARLESTOWN, MA 02129 and the phone number is (617) 724-4507.
Psychiatry & Neurology with taxonomy code 2084V0102X and a focus in Vascular Neurology.
