Cory Gene Preston, OD
Optometrist · Sunnvyale, CA
Cory Gene Preston, OD is an optometrist with a practice address in Sunnvyale, California, and NPI 1679533681, issued on Mar 24, 2006. Check the license (California OPT11523, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Cory Gene Preston
- Credential
- OD
- Primary taxonomy
- Optometrist 152W00000X
- License numbers
- OPT11523 CA
TUV006337-1 NY
Self-reported in NPPES; status is on the state search - Practice location
- 323 Mathilda Ave, Sunnvyale, CA 94085
- Phone
- (408) 524-5900
- Enumerated
- Mar 24, 2006
- Record last updated
- Sep 14, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20131118001031); accepts Medicare assignment
- Medical or professional school
- New England College Of Optometry, 2000
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Verify Cory Gene Preston in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license OPT11523Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Iseeu OptometryPalm Desert, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cory Gene Preston among 8,308 optometrist records in California
Cory Gene Preston, OD is one of 8,308 optometrist records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 66% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated2000 · median 2008 among the 3,573 with a school on file
- Record last updated2016 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Optometrist providers in California
There are 8,308 optometrist records in California.
The 8 optometrist records with the nearest ZIP codes
- Michael Fain, O.D.Sunnyvale, CA 940851508931601
- Rita Fong, ODSunnyvale, CA 940851912072042
- Julie Hwang, O.D.Sunnyvale, CA 940851457544488
- Nicole Janovitch, O.D.Sunnyvale, CA 940851720133036
- Karin Meng, O.D.Sunnyvale, CA 940851730234048
- Trennda Rittenbach, O.D.Sunnyvale, CA 940851427207497
- Sangita Shah, O.D.Sunnyvale, CA 940851649346701
- Nicholas Froumis, O.D.Sunnyvale, CA 940861407911282
Common questions
What is Cory Gene Preston, OD's NPI number?
Cory Gene Preston, OD's National Provider Identifier (NPI) is 1679533681, issued on Mar 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Cory Gene Preston, OD located?
The NPPES record lists a practice address at 323 Mathilda Ave, Sunnvyale, CA, 94085. Phone: (408) 524-5900. Providers update this record themselves, so call before visiting.
How can I verify Cory Gene Preston, OD's license?
NPPES lists California license number OPT11523, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.