DR. GREGORY K.W. KO O.D. NPI 1790838092
Optometrist in Pleasanton, CA


Gregory Ko is a provider established in Pleasanton, California and his medical specialization is Optometrist. The NPI number of this provider is 1790838092 and was assigned on January 2007. The practitioner's primary taxonomy code is 152W00000X with license number 5976T (CA). The provider is registered as an individual and his NPI record was last updated 16 years ago.

Provider NameDR. GREGORY K.W. KO O.D.
Location Address5580 SPRINGDALE AVE STE E PLEASANTON, CA 94588
Location Phone(925) 463-3100
Mailing Address4180 LARK CT FREMONT, CA 94555
NPI Entity TypeIndividual
Is Sole Proprietor?Yes
Enumeration Date01-19-2007
Last Update Date07-08-2007

Primary Taxonomy

The primary taxonomy code defines the provider type, classification, and specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Taxonomy Code152W00000X
TypeEye and Vision Services Providers
License No.5976T
License StateCA
Taxonomy DescriptionDoctors 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.

Business Address

ZIP 94588
Phone: (925) 463-3100

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Mailing Address

4180 LARK CT
ZIP 94555
Phone: (510) 477-0437

Location Map

NPI Validation Check Digit Calculation

The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

Start with the original NPI number, the last digit is the check digit and is not used in the calculation.
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 7 + 1 + 8 + 0 + 1 + 6 + 3 + 1 + 6 + 0 + 1 + 8 + 24 = 68
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
70 - 68 = 22

The NPI number 1790838092 is valid because the calculated check digit 2 using the Luhn validation algorithm matches the last digit of the original NPI number.

Frequently Asked Questions

What is Dr. Gregory Ko O.D. NPI number?

The NPI number assigned to this healthcare provider is 1790838092, registered as an "individual" on January 19, 2007

Where is Dr. Gregory Ko O.D. located?

The provider is located at 5580 Springdale Ave Ste E Pleasanton, Ca 94588 and the phone number is (925) 463-3100

Which is Dr. Gregory Ko O.D. specialty?

The provider's speciality is Optometrist

How do I update my NPI information?

The NPI record of Dr. Gregory Ko O.D. was last updated on January 19, 2007. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
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