MARK IHRIG ABO
NPI 1063206852
Technician/Technologist - Ophthalmic in Suisun City, CA

NPI Status: Active since April 07, 2025

Contact Information

350 WALTERS RD
SUISUN CITY, CA
ZIP 94585
Phone: (707) 639-4984
Fax: (707) 426-4875

NPI Profile Information
Primary Taxonomy
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Technician/Technologist
Ophthalmic

About MARK IHRIG

This page provides the complete NPI Profile along with additional information for Mark Ihrig, a provider established in Suisun City, California with a medical specialization in Technician/technologist, focusing in ophthalmic . The healthcare provider is registered in the NPI registry with number 1063206852 assigned on April 2025. The practitioner's primary taxonomy code is 156FX1100X with license number SL40684 (CA). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI: 1063206852
Provider Name: MARK IHRIG ABO
Gender: Male
Entity Type: Individual
Location Address: 350 WALTERS RD SUISUN CITY, CA 94585
Location Phone: (707) 639-4984
Location Fax: (707) 426-4875
Mailing Address: 350 WALTERS RD SUISUN CITY, CA 94585
Mailing Phone: (707) 639-4984
Mailing Fax: (707) 426-4875
Is Sole Proprietor?: Yes
Enumeration Date: 04-07-2025
Last Update Date: 04-07-2025
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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: Technician/Technologist Ophthalmic
Taxonomy Code: 156FX1100X
Type: Eye and Vision Services Providers
License No.: SL40684
License State: CA
Taxonomy Description: An ophthalmic technician/technologist assists ophthalmologists by performing ophthalmic clinical functions, including administering eye exams, administering eye medications, and instructing the patient in care and use of corrective lenses.

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 1063206852, we treat the final digit (2) 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 48. The final step is to find the difference between that total and the next multiple of ten (50 - 48 = 2).

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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 12 → 1 + 2

Pos 4

Unchanged

Pos 5

Doubled → 4

Pos 6

Unchanged

Pos 7

Doubled → 12 → 1 + 2

Pos 8

Unchanged

Pos 9

Doubled → 10 → 1 + 0

Check

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 6 → 12 → 3 2 → 4 6 → 12 → 3 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 1 + 2 + 3 + 4 + 0 + 1 + 2 + 8 + 1 + 0 + 24 = 48

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

The next multiple of ten after 48 is 50. The difference is the calculated check digit.

50 - 48 = 2

This NPI is valid

The calculated check digit is 2, which matches the last digit of 1063206852.