ALEXANDER TOMAS ADLER GREGOR MD
NPI 1881498152
Student in an Organized Health Care Education/Training Program in New York, NY
NPI Status: Active since April 03, 2025
Contact Information
1275 YORK AVENUE
BOX 435
NEW YORK, NY
ZIP 10065
Phone: (212) 639-7537
Fax: (416) 480-4225
- Individual
- Male
- Student in an Organized Health Care Educ...
About ALEXANDER GREGOR
This page provides the complete NPI Profile along with additional information for Alexander Gregor, a primary care provider established in New York, New York with a medical specialization in Student In An Organized Health Care Education/training Program. The healthcare provider is registered in the NPI registry with number 1881498152 assigned on April 2025. The practitioner's primary taxonomy code is 390200000X with license number 339018 (NY). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1881498152
- Provider Name
- ALEXANDER TOMAS ADLER GREGOR MD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 1275 YORK AVENUE BOX 435 NEW YORK, NY 10065
- Location Phone
- (212) 639-7537
- Location Fax
- (416) 480-4225
- Mailing Address
- 1275 YORK AVENUE BOX 435 NEW YORK, NY 10065
- Mailing Phone
- (212) 639-7537
- Is Sole Proprietor?
- No
- Enumeration Date
- 04-03-2025
- Last Update Date
- 08-27-2025
- Code Navigator
A primary care provider (PCP) like Alexander Gregor sees people with common medical problems. The primary care provider might be a doctor, physician assistant, nurse practitioner or clinic that are usually involved in your long-term care. A PCP might provide preventive care, treat common medical conditions, identify urgent medical problems and refer you to specialists when necessary. Primary care is usually provided in an outpatient facility but if you are admitted to a hospital your PCP may assist in your care. The most common medical conditions seen by primary care providers are: hypertension, upper respiratory tract infections, depression or anxiety, back pain, arthritis, dermatitis, diabetes, urinary tract infections, etc .
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
Student in an Organized Health Care Education/Training Program
- Taxonomy Code
- 390200000X
- Type
- Student, Health Care
- License No.
- 339018
- License State
- NY
- Taxonomy Description
- An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
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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 1881498152, 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 68. The final step is to find the difference between that total and the next multiple of ten (70 - 68 = 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 68 is 70. The difference is the calculated check digit.
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Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1881498152, enumerated as an "individual" on April 03, 2025.
The provider is located at 1275 YORK AVENUE BOX 435 NEW YORK, NY 10065 and the phone number is (212) 639-7537.
Student in an Organized Health Care Education/Training Program with taxonomy code 390200000X.
