Diana Chen, OD
Optometrist · Walnut Creek, CA
Diana Chen, OD is an optometrist with a practice address in Walnut Creek, California, and NPI 1962989863, issued on Jul 24, 2018. Check the license (California 34271, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Diana Chen
- Credential
- OD
- Primary taxonomy
- Optometrist 152W00000X
- License numbers
- 34271 CA
9524TG TX
Self-reported in NPPES; status is on the state search - Practice location
- 1855 San Miguel Dr Ste 28, Walnut Creek, CA 94596
- Phone
- (925) 935-8820
- Enumerated
- Jul 24, 2018
- Record last updated
- Sep 28, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20230706003770); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Also registered at 1855 San Miguel Dr Ste 28
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Levon Djenderedjian, MDOphthalmology Physician1952756256
Verify Diana Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 34271Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $524.26
13 payments; by number, the most common kind was food and beverage; the largest payer was Johnson & Johnson Vision Care, Inc. The 34,453 providers of this specialty with any payment received $769.99 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Reina Y Perez A Professional CorporationFoster City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Diana Chen among 8,308 optometrist records in California
Diana Chen, 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 2018, is newer than 79% of them.
- NPI issued2018 · 79% of these records are older, 19% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated2018 · median 2008 among the 3,573 with a school on file
- Record last updated2020 · 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.
All 8,308 in California → Every provider in Walnut Creek → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Thomas Callan, ODWalnut Creek, CA 945961043348394
- Stephanie Chan, ODWalnut Creek, CA 945961689635542
- Stephen Dentone, O.D.Walnut Creek, CA 945961811026552
- Rachel KanetaWalnut Creek, CA 945961891072906
- Roderick Keener, O.D.Walnut Creek, CA 945961871648865
- Lawrence Mock, ODWalnut Creek, CA 945961164419149
- Bach-Kim Nguyen, O.D.Walnut Creek, CA 945961942235734
- Michael Roy, O D INCWalnut Creek, CA 945961770577892
Common questions
What is Diana Chen, OD's NPI number?
Diana Chen, OD's National Provider Identifier (NPI) is 1962989863, issued on Jul 24, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Diana Chen, OD located?
The NPPES record lists a practice address at 1855 San Miguel Dr Ste 28, Walnut Creek, CA, 94596. Phone: (925) 935-8820. Providers update this record themselves, so call before visiting.
How can I verify Diana Chen, OD's license?
NPPES lists California license number 34271, 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.