Optometrists in Ontario, CA
Browse 25 Optometrist providers listed in NPPES with a practice address in Ontario, California.
How Ontario compares with the U.S.
Ontario has 14 Optometrists per 100,000 residents, about 75% of the U.S. rate of 19.
That is 25 active Optometrists with a practice address in Ontario, for a population of 180,547.
The California rate is 21 per 100,000 residents.
What these numbers mean
Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.
A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.
City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places.
Too few Optometrists in Ontario are listed in the CMS Medicare file to report Medicare assignment or telehealth shares.
These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.
Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com · Methodology
Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).
Optometrist Medicare (PECOS) Enrollment & Ordering Eligibility
Medicare enrollment and order/referring eligibility listed by CMS for Optometrist practitioners in Ontario, CA
Dr. Laurel Jensen , OD
Optometrist
Dr. John Scott Rossi , OD
Optometrist
Dr. Catherine Tuong , OD
Optometrist
Dr. Nasiem Adnan Umberg , OD
Optometrist
Dr. Arsineh Amirkhanian , OD
Optometrist
Dr. Jerry Ullah Chaudhry , OD
Optometrist
Dr. Michelle Anne Duran , OD
Optometrist
Dr. Robert Randal Edwards , OD
Optometrist
Dr. Francesca Antoinette Fuertez , OD
Optometrist
Dr. Dennis Lee Gaedig , OD
Optometrist
Dr. Danny Lee Head , OD
Optometrist
Dr. Jason Lam , OD
Optometrist
Jason Kang Lee
Optometrist
Dr. Judith Lee , OD
Optometrist
Dr. Sandra Akemi Ninomiya , OD
Optometrist
Dr. Beverly Nishitani , OD
Optometrist
Dr. Vincent Minh Pham , OD
Optometrist
Dr. Elizabeth Anne Simpson , OD
Optometrist
Dr. Richard L Simpson , OD
Optometrist
Dr. Whitnie Szutu , OD
Optometrist
Frequently Asked Questions about Optometrist in Ontario
Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the California licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.
This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.
Other Specialties in Ontario
Optometrists in Other California Cities
Cities with the most listed practitioners first.