MARK PAUL BENJAMIN OPTOMETRIST OD DEGRE
NPI 1669599403
Optometrist - Vision Therapy in Merrillville, IN
NPI Status: Active since March 26, 2007
Contact Information
759 EAST 81ST AVENUE
MERRILLVILLE, IN
ZIP 46410
Phone: (219) 736-0013
Fax: (219) 769-8842
- Individual
- Male
- Optometrist
- Vision Therapy
About MARK BENJAMIN
This page provides the complete NPI Profile along with additional information for Mark Benjamin, a provider established in Merrillville, Indiana with a medical specialization in Optometrist, focusing in vision therapy . The healthcare provider is registered in the NPI registry with number 1669599403 assigned on March 2007. The practitioner's primary taxonomy code is 152WV0400X with license number 18002462B (IN). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1669599403
- Provider Name
- MARK PAUL BENJAMIN OPTOMETRIST OD DEGRE
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 759 EAST 81ST AVENUE MERRILLVILLE, IN 46410
- Location Phone
- (219) 736-0013
- Location Fax
- (219) 769-8842
- Mailing Address
- 823 WEST 89TH PLACE MERRILLVILLE, IN 46410
- Mailing Phone
- (219) 795-1356
- Is Sole Proprietor?
- No
- Enumeration Date
- 03-26-2007
- Last Update Date
- 09-11-2025
- 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
Optometrist Vision Therapy
- Taxonomy Code
- 152WV0400X
- Type
- Eye and Vision Services Providers
- License No.
- 18002462B
- License State
- IN
- Taxonomy Description
- Optometrists who specialize in vision therapy as a treatment process used to improve vision function. It includes a broad range of developmental and rehabilitative treatment programs individually prescribed to remediate specific sensory, motor and/or visual perceptual dysfunctions.
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 | 152W00000X | Eye and Vision Services Providers | Optometrist | 18002462A (IN) |
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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 1669599403, we treat the final digit (3) 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 67. The final step is to find the difference between that total and the next multiple of ten (70 - 67 = 3).
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 67 is 70. The difference is the calculated check digit.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1669599403, enumerated as an "individual" on March 26, 2007.
The provider is located at 759 EAST 81ST AVENUE MERRILLVILLE, IN 46410 and the phone number is (219) 736-0013.
Optometrist with taxonomy code 152WV0400X and a focus in Vision Therapy.
