DR. RAJ AHSAN M.D.
NPI 1659696425
Preventive Medicine - Occupational Medicine in Manhasset, NY
NPI Status: Active since April 05, 2010
Contact Information
300 COMMUNITY DR
MANHASSET, NY
ZIP 11030
Phone: (516) 562-0100
NPPES record last updated: November 29, 2017. Verified against the NPPES registry weekly; last sync: July 12, 2026.
- Individual
- Male
- Preventive Medicine
- Occupational Medicine
About RAJ AHSAN
This page provides the complete NPI Profile along with additional information for Raj Ahsan, a provider established in Manhasset, New York with a medical specialization in Preventive Medicine, focusing in occupational medicine . The healthcare provider is registered in the NPI registry with number 1659696425 assigned on April 2010. The practitioner's primary taxonomy code is 2083X0100X with license number 054311 (CT). The provider is registered as an individual and his NPI record was last updated 9 years ago.
- NPI
- 1659696425
- Provider Name
- DR. RAJ AHSAN M.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 300 COMMUNITY DR MANHASSET, NY 11030
- Location Phone
- (516) 562-0100
- Mailing Address
- 2015 W MAIN ST STE 100 STAMFORD, CT 06902
- Mailing Phone
- (203) 863-3483
- Mailing Fax
- (203) 863-3495
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 04-05-2010
- Last Update Date
- 11-29-2017
- 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
Preventive Medicine Occupational Medicine
- Taxonomy Code
- 2083X0100X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 054311
- License State
- CT
- Taxonomy Description
- Occupational medicine focuses on the health of workers, including the ability to perform work; the physical, chemical, biological, and social environments of the workplace; and the health outcomes of environmental exposures. Practitioners in this field address the promotion of health in the work place, and the prevention and management of occupational and environmental injury, illness, and disability.
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 | 207R00000X | Allopathic & Osteopathic Physicians | Internal Medicine | 263739 (NY) |
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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 1659696425, we treat the final digit (5) 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 65. The final step is to find the difference between that total and the next multiple of ten (70 - 65 = 5).
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 65 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1659696425, enumerated as an "individual" on April 05, 2010.
The provider is located at 300 COMMUNITY DR MANHASSET, NY 11030 and the phone number is (516) 562-0100.
Preventive Medicine with taxonomy code 2083X0100X and a focus in Occupational Medicine.
