DR. MARK GILBERT GRAND MD
NPI 1841298551
Ophthalmology - Retina Specialist in Saint Louis, MO
NPI Status: Active since July 07, 2005
Contact Information
8820 LADUE RD STE 203
SAINT LOUIS, MO
ZIP 63124
Phone: (314) 367-1181
Fax: (314) 968-5117
- Individual
- Male
- Ophthalmology
- Retina Specialist
About MARK GRAND
This page provides the complete NPI Profile along with additional information for Mark Grand, a provider established in Saint Louis, Missouri with a medical specialization in Ophthalmology, focusing in retina specialist . The healthcare provider is registered in the NPI registry with number 1841298551 assigned on July 2005. The practitioner's primary taxonomy code is 207WX0107X with license number R4698 (MO). The provider is registered as an individual and his NPI record was last updated 2 years ago.
- NPI
- 1841298551
- Provider Name
- DR. MARK GILBERT GRAND MD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 8820 LADUE RD STE 203 SAINT LOUIS, MO 63124
- Location Phone
- (314) 367-1181
- Location Fax
- (314) 968-5117
- Mailing Address
- 8820 LADUE RD STE 203 SAINT LOUIS, MO 63124
- Mailing Phone
- (314) 367-1181
- Mailing Fax
- (314) 968-5117
- Is Sole Proprietor?
- No
- Enumeration Date
- 07-07-2005
- Last Update Date
- 09-03-2024
- 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
Ophthalmology Retina Specialist
- Taxonomy Code
- 207WX0107X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- R4698
- License State
- MO
- Taxonomy Description
- An ophthalmologist who specializes in the diagnosis and treatment of vitreoretinal diseases.
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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 1841298551, we treat the final digit (1) 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 69. The final step is to find the difference between that total and the next multiple of ten (70 - 69 = 1).
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 69 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 1 provider is registered at the same or a nearby location.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1841298551, enumerated as an "individual" on July 07, 2005.
The provider is located at 8820 LADUE RD STE 203 SAINT LOUIS, MO 63124 and the phone number is (314) 367-1181.
Ophthalmology with taxonomy code 207WX0107X and a focus in Retina Specialist.
