GRANT J RIEW MD
NPI 1053251009
Student in an Organized Health Care Education/Training Program in Greenwich, CT
NPI Status: Active since March 30, 2026
Contact Information
5 PERRYRIDGE RD
GREENWICH, CT
ZIP 06830
Phone: (203) 863-3922
- Individual
- Male
- Student in an Organized Health Care Educ...
About GRANT RIEW
This page provides the complete NPI Profile along with additional information for Grant Riew, a primary care provider established in Greenwich, Connecticut 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 1053251009 assigned on March 2026. The practitioner's primary taxonomy code is 390200000X. The provider is registered as an individual and his NPI record was last updated March 2026.
- NPI
- 1053251009
- Provider Name
- GRANT J RIEW MD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 5 PERRYRIDGE RD GREENWICH, CT 06830
- Location Phone
- (203) 863-3922
- Mailing Address
- 96 DOUBLING RD GREENWICH, CT 06830
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 03-30-2026
- Last Update Date
- 03-30-2026
- Code Navigator
A primary care provider (PCP) like Grant Riew 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 State
- CT
- 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.
Reviews for GRANT J RIEW MD
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 1053251009, we treat the final digit (9) 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 41. The final step is to find the difference between that total and the next multiple of ten (50 - 41 = 9).
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 41 is 50. 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.
GREENWICH, CT 06830
GREENWICH, CT 06830
GREENWICH, CT 06830
GREENWICH, CT 06830
GREENWICH, CT 06830
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1053251009, enumerated as an "individual" on March 30, 2026.
The provider is located at 5 PERRYRIDGE RD GREENWICH, CT 06830 and the phone number is (203) 863-3922.
Student in an Organized Health Care Education/Training Program with taxonomy code 390200000X.
