EDWARD A WILLIAMS O.D.
NPI 1568432631
Optometrist in Martinez, CA
NPI Status: Active since January 23, 2006
Contact Information
835 MAIN ST
MARTINEZ, CA
ZIP 94553
Phone: (925) 228-3737
Fax: (925) 228-3708
- Individual
- Male
- Optometrist
About EDWARD WILLIAMS
This page provides the complete NPI Profile along with additional information for Edward Williams, a provider established in Martinez, California with a medical specialization in Optometrist. The healthcare provider is registered in the NPI registry with number 1568432631 assigned on January 2006. The practitioner's primary taxonomy code is 152W00000X with license number 7088T (CA). The provider is registered as an individual and his NPI record was last updated July 2025.
- NPI
- 1568432631
- Provider Name
- EDWARD A WILLIAMS O.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 835 MAIN ST MARTINEZ, CA 94553
- Location Phone
- (925) 228-3737
- Location Fax
- (925) 228-3708
- Mailing Address
- 835 MAIN ST MARTINEZ, CA 94553
- Mailing Phone
- (925) 228-3737
- Mailing Fax
- (925) 228-3708
- Is Sole Proprietor?
- No
- Enumeration Date
- 01-23-2006
- Last Update Date
- 07-20-2025
- 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
Optometrist
- Taxonomy Code
- 152W00000X
- Type
- Eye and Vision Services Providers
- License No.
- 7088T
- License State
- CA
- 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.
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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. | |||||||||
| 1 | 5 | 6 | 8 | 4 | 3 | 2 | 6 | 3 | 1 |
| Step 1: Double the value of the alternate digits, beginning with the rightmost digit. | |||||||||
| 2 | 5 | 12 | 8 | 8 | 3 | 4 | 6 | 6 | |
| Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24. | |||||||||
| 2 + 5 + 1 + 2 + 8 + 8 + 3 + 4 + 6 + 6 + 24 = 69 | |||||||||
| Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit. | |||||||||
| 70 - 69 = 1 | 1 | ||||||||
The NPI number 1568432631 is valid because the calculated check digit 1 using the Luhn validation algorithm matches the last digit of the original NPI number.
Other Providers at the Same Location
The following 2 providers are registered at the same or nearby location.
| NPI | Name / Type | Taxonomy | Address |
|---|---|---|---|
| 1003180597 | EDWARD A. WILLIAMS, O.D., INC. Organization | Optometrist | 835 MAIN ST MARTINEZ, CA 94553 (925) 228-3737 |
| 1679861272 | DR. CHEYENNE CHINEA GENGLER O.D. Individual | Optometrist | 835 MAIN ST MARTINEZ, CA 94553 (925) 228-3737 |
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1568432631, enumerated in the NPI registry as an "individual" on January 23, 2006
The provider is located at 835 Main St Martinez, Ca 94553 and the phone number is (925) 228-3737
The provider's speciality is Optometrist with taxonomy code 152W00000X
This NPI record was last updated on January 23, 2006. 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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