DR. ROBERT J BARABAS OD, FAAO
NPI 1235342429
Optometrist - Corneal and Contact Management in Chicago, IL

NPI Status: Active since May 07, 2007

Contact Information

2 N. LA SALLE STREET
SUITE 155
CHICAGO, IL
ZIP 60602
Phone: (312) 236-7538
Fax: (312) 236-1205

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  • Individual
  • Male
  • Optometrist
  • Corneal and Contact Management

About ROBERT BARABAS

This page provides the complete NPI Profile along with additional information for Robert Barabas, a provider established in Chicago, Illinois with a medical specialization in Optometrist, focusing in corneal and contact management . The healthcare provider is registered in the NPI registry with number 1235342429 assigned on May 2007. The practitioner's primary taxonomy code is 152WC0802X. The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI
1235342429
Provider Name
DR. ROBERT J BARABAS OD, FAAO
Gender
Male
Entity Type
Individual
Location Address
2 N. LA SALLE STREET SUITE 155 CHICAGO, IL 60602
Location Phone
(312) 236-7538
Location Fax
(312) 236-1205
Mailing Address
2 N. LA SALLE STREET SUITE 155 CHICAGO, IL 60602
Mailing Phone
(312) 236-7538
Mailing Fax
(312) 236-1205
Is Sole Proprietor?
No
Enumeration Date
05-07-2007
Last Update Date
07-08-2007
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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 Corneal and Contact Management

Taxonomy Code
152WC0802X
Type
Eye and Vision Services Providers
License State
IL
Taxonomy Description
The professional activities performed by an Optometrist related to the fitting of contact lenses to an eye, ongoing evaluation of the cornea's ability to sustain successful contact lens wear, and treatment of any external eye or corneal condition which can affect contact lens wear.

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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 1235342429, 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 61. The final step is to find the difference between that total and the next multiple of ten (70 - 61 = 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.

Pos 1
1
Doubled → 2
Pos 2
2
Unchanged
Pos 3
3
Doubled → 6
Pos 4
5
Unchanged
Pos 5
3
Doubled → 6
Pos 6
4
Unchanged
Pos 7
2
Doubled → 4
Pos 8
4
Unchanged
Pos 9
2
Doubled → 4
Check
9
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 3 → 6 3 → 6 2 → 4 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 2 + 6 + 5 + 6 + 4 + 4 + 4 + 4 + 24 = 61

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

The next multiple of ten after 61 is 70. The difference is the calculated check digit.

70 - 61 = 9
This NPI is valid
The calculated check digit is 9, which matches the last digit of 1235342429.

Other Providers at the Same Location


The following 1 provider is registered at the same or a nearby location.

Optometrist (Corneal and Contact Management)
2 N. LA SALLE STREET, SUITE 155
CHICAGO, IL 60602

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1235342429, enumerated as an "individual" on May 07, 2007.

The provider is located at 2 N. LA SALLE STREET SUITE 155 CHICAGO, IL 60602 and the phone number is (312) 236-7538.

Optometrist with taxonomy code 152WC0802X and a focus in Corneal and Contact Management.