JAMES P JOHNSTON
NPI 1659371094
Technician/Technologist - Ocularist in Michigan City, IN
NPI Status: Active since July 28, 2005
Contact Information
450 SAINT JOHN RD
STE 404
MICHIGAN CITY, IN
ZIP 46360
Phone: (219) 874-7236
- Individual
- Male
- Technician/Technologist
- Ocularist
About JAMES JOHNSTON
This page provides the complete NPI Profile along with additional information for James Johnston, a provider established in Michigan City, Indiana with a medical specialization in Technician/technologist, focusing in ocularist . The healthcare provider is registered in the NPI registry with number 1659371094 assigned on July 2005. The practitioner's primary taxonomy code is 156FX1700X with license number DEPARTMENT OF LABOR (IL). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1659371094
- Provider Name
- JAMES P JOHNSTON
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 450 SAINT JOHN RD STE 404 MICHIGAN CITY, IN 46360
- Location Phone
- (219) 874-7236
- Mailing Address
- 450 SAINT JOHN RD STE 404 MICHIGAN CITY, IN 46360
- Mailing Phone
- (219) 874-7236
- Is Sole Proprietor?
- No
- Enumeration Date
- 07-28-2005
- 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
Technician/Technologist Ocularist
- Taxonomy Code
- 156FX1700X
- Type
- Eye and Vision Services Providers
- License No.
- DEPARTMENT OF LABOR
- License State
- IL
- Taxonomy Description
- An ocularist is a thoroughly trained professional skilled in the art of fitting, painting, and fabricating custom ocular prostheses. In addition to creating custom ocular prostheses, and providing long-term care through periodic examinations, an ocularist provides the patient with complete instructions on the care and maintenance of their prosthesis.
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 | 156FX1700X | Eye and Vision Services Providers | Technician/Technologist | 5001000030 (MI) |
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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 1659371094, we treat the final digit (4) 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 66. The final step is to find the difference between that total and the next multiple of ten (70 - 66 = 4).
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 66 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 18 providers are registered at the same or a nearby location.
MICHIGAN CITY, IN 46360
MICHIGAN CITY, IN 46360
MICHIGAN CITY, IN 46360
MICHIGAN CITY, IN 46360
MICHIGAN CITY, IN 46360
MICHIGAN CITY, IN 46360
MICHIGAN CITY, IN 46360
MICHIGAN CITY, IN 46360
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1659371094, enumerated as an "individual" on July 28, 2005.
The provider is located at 450 SAINT JOHN RD STE 404 MICHIGAN CITY, IN 46360 and the phone number is (219) 874-7236.
Technician/Technologist with taxonomy code 156FX1700X and a focus in Ocularist.
