EDWARD A. WILLIAMS, O.D., INC.
EDWARD A. WILLIAMS, O.D., INC. is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1003180597, based in Martinez, CA. It is classified under Optometrist.
Getting there
Here is what surrounds this office in Martinez, based on OpenStreetMap data collected Sep 10, 2026. Parking is available about 308 ft away. There is EV charging 796 ft from the office — useful if you are driving in from out of town. The nearest transit stop is 712 ft away, served by Court Street & Green Street. If you arrive early, there is a coffee shop 668 ft away.
Getting here and what is nearby
Restaurant Slice of Martinez Pizza and Cheesesteaks 96 ft ~1 min
802 Main Street, Martinez 94553
Coffee Barrelista Coffee House 168 ft ~1 min
736 Main Street, Martinez 94553
Mo 07:00-16:00, Tu-We 06:30-17:00, Th-Fr 06:30-20:00, Sa 07:00-20:00, Su 07:00-16:00
Parking 173 ft ~1 min
Restaurant Canton Restaurant 188 ft ~1 min
Restaurant Subway 217 ft ~1 min
732 Main Street, Martinez 94553
Mo-Fr 07:00-20:00; Sa 08:00-18:00; Su 09:00-18:00
Parking 238 ft ~1 min
Parking 308 ft ~2 min
Coffee Starbucks 377 ft ~2 min
Convenience Marina Market 358 ft ~2 min
735 Escobar Street, Martinez 94553
Mo-Th 05:00-01:00, Fr-Sa 05:00-02:00, Su 05:00-24:00
Transit Court Street & Marina Vista Avenue 550 ft ~3 min
Transit Court Street & Ward Street 554 ft ~3 min
Transit Court Street & Green Street 712 ft ~3 min
Coffee States Coffee 668 ft ~3 min
609 Ward Street, Martinez 94553
Mo-Su 07:00-15:00
EV charging ChargePoint 770 ft ~3 min
EV charging 795 ft ~4 min
EV charging 796 ft ~4 min
Convenience Valley Convenient Mart 943 ft ~4 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| OPT 7088T | CA | Optometrist primary |
This provider holds licence OPT 7088T issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Optometrist covers
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. NUCC Health Care Provider Taxonomy, code 152W00000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1003180597 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Feb 29, 2012 |
| Last updated | Feb 29, 2012 |
| Status | Active |
| Practice address |
835 MAIN ST Martinez, CA 94553 (925) 228-3737 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 1 | 8 | 0 | 5 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 8 | 0 | 5 | 9 |
Sum = 53 · next multiple of 10 = 60 · check digit = 7 · actual last digit = 7
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.