AUSTIN GREGORY O.D.
NPI 1154746394
Optometrist in Evanston, IL

NPI Status: Active since February 25, 2014

Contact Information

522 DEMPSTER ST
EVANSTON, IL
ZIP 60202
Phone: (847) 864-5200
Fax: (847) 864-1231

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  • Individual
  • Male
  • Optometrist

About AUSTIN GREGORY

This page provides the complete NPI Profile along with additional information for Austin Gregory, a provider established in Evanston, Illinois with a medical specialization in Optometrist. The healthcare provider is registered in the NPI registry with number 1154746394 assigned on February 2014. The practitioner's primary taxonomy code is 152W00000X with license number 046010837 (IL). The provider is registered as an individual and his NPI record was last updated 8 years ago. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization.

NPI
1154746394
Provider Name
AUSTIN GREGORY O.D.
Gender
Male
Entity Type
Individual
Location Address
522 DEMPSTER ST EVANSTON, IL 60202
Location Phone
(847) 864-5200
Location Fax
(847) 864-1231
Mailing Address
2114 UNION ST APT A SAN FRANCISCO, CA 94123
Mailing Phone
(805) 234-0528
Is Sole Proprietor?
Yes
Enumeration Date
02-25-2014
Last Update Date
01-25-2018
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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

Taxonomy Code
152W00000X
Type
Eye and Vision Services Providers
License No.
046010837
License State
IL
Taxonomy Description
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.

Group Taxonomy 193400000X SINGLE SPECIALTY GROUP

This provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.

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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 1154746394, 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 56. The final step is to find the difference between that total and the next multiple of ten (60 - 56 = 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.

Pos 1
1
Doubled → 2
Pos 2
1
Unchanged
Pos 3
5
Doubled → 10 → 1 + 0
Pos 4
4
Unchanged
Pos 5
7
Doubled → 14 → 1 + 4
Pos 6
4
Unchanged
Pos 7
6
Doubled → 12 → 1 + 2
Pos 8
3
Unchanged
Pos 9
9
Doubled → 18 → 1 + 8
Check
4
Target digit
Regular digit Doubled digit Check digit

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.

1 → 2 5 → 10 → 1 7 → 14 → 5 6 → 12 → 3 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 1 + 1 + 0 + 4 + 1 + 4 + 4 + 1 + 2 + 3 + 1 + 8 + 24 = 56

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 56 is 60. The difference is the calculated check digit.

60 - 56 = 4
This NPI is valid
The calculated check digit is 4, which matches the last digit of 1154746394.

Other Providers at the Same Location


The following 4 providers are registered at the same or a nearby location.

Optometrist
522 DEMPSTER ST
EVANSTON, IL 60202
Optometrist
522 DEMPSTER ST
EVANSTON, IL 60202
Optometrist
522 DEMPSTER ST
EVANSTON, IL 60202
Optometrist
522 DEMPSTER ST
EVANSTON, IL 60202

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1154746394, enumerated as an "individual" on February 25, 2014.

The provider is located at 522 DEMPSTER ST EVANSTON, IL 60202 and the phone number is (847) 864-5200.

Optometrist with taxonomy code 152W00000X.