Ashley Greenawalt Chung, OD, MS
Optometrist · Santa Clara, CA
Ashley Greenawalt Chung, OD, MS is an optometrist with a practice address in Santa Clara, California, and NPI 1114378353, issued on Jun 29, 2016. Check the license (California 33444, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ashley Greenawalt Chung
- Credential
- OD, MS
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 33444 CA
Self-reported in NPPES; status is on the state search - Practice location
- 710 Lawrence Expy Dept 486, Santa Clara, CA 95051
- Phone
- (408) 554-9830
- Enumerated
- Jun 29, 2016
- Record last updated
- Jan 26, 2022
- Medicare enrollment
- Enrolled (PECOS I20171103002651); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 710 Lawrence Expy Dept 486
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alana Zhou, O.D.Optometrist1518019660
Verify Ashley Greenawalt Chung in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 33444Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average optometrist in 2024
21 Medicare Part D claims for 12 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 57% of claims.
Most prescribed
- Cyclosporine11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Permanente Medical Group IncSanta Clara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
59 optometrist records list a practice address in Santa Clara
They are 59 of the 3,436 NPPES records with a practice address in Santa Clara, and 8,308 optometrist records in California.
All 59 in Santa Clara → All 8,308 in California → Every provider in Santa Clara →
Other optometrist records in California
- Douglas Aaseby, O.D.El Dorado Hills, CA1962715961
- Saloumeh Abadi, ODSanta Monica, CA1699258756
- Davoud AbbasiFillmore, CA1902361678
- Christopher Abbott, O.D.Santee, CA1417936220
- Sara Abboud, ODAlbany, CA1649052846
- Ghezal Abdali, O.D.Tustin, CA1770688640
- Nahid Abdali, O.D.San Ramon, CA1700210242
- Yasmeen AbdelfattahIrvine, CA1417786617
- Marina Abdou, ODUpland, CA1356017321
- Angela Abe, OPTModesto, CA1336108885
Common questions
What is Ashley Greenawalt Chung, OD, MS's NPI number?
Ashley Greenawalt Chung, OD, MS's National Provider Identifier (NPI) is 1114378353, issued on Jun 29, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Ashley Greenawalt Chung, OD, MS located?
The NPPES record lists a practice address at 710 Lawrence Expy Dept 486, Santa Clara, CA, 95051. Phone: (408) 554-9830. Providers update this record themselves, so call before visiting.
How can I verify Ashley Greenawalt Chung, OD, MS's license?
NPPES lists California license number 33444, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Ashley Greenawalt Chung, OD, MS prescribe under Medicare Part D?
In 2024, Ashley Greenawalt Chung, OD, MS had 21 Medicare Part D claims for 12 beneficiaries; the average among optometrist prescribers was 277. Part D covers Medicare prescriptions 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.