Diana Chau, OD
Optometrist · Seattle, WA
Diana Chau, OD is an optometrist with a practice address in Seattle, Washington, and NPI 1023749041, issued on Jun 21, 2022. Check the license (Washington OD61288124, as entered in NPPES) with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Diana Chau
- Credential
- OD
- Primary taxonomy
- Optometrist 152W00000X
- License number
- OD61288124 WA
Self-reported in NPPES; status is on the state search - Practice location
- 9800 4TH Ave NE, Seattle, WA 98115
- Phone
- (206) 302-1200
- Enumerated
- Jun 21, 2022
- Record last updated
- Feb 10, 2026
- Medicare enrollment
- Enrolled (PECOS I20240218000023); accepts Medicare assignment
- Medical or professional school
- Southern California College Of Optometry, 2022
- Entity
- Type 1 · individual
8 nearest optometrist records → All 1,641 in Washington → Look up another NPI →
Also registered at 9800 4TH Ave NE
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Donald Avriett, M.D.Family Medicine Physician1154475077
- Haley Bader, MAMental Health Counselor1932777000
- Ken Balter, PA CPhysician Assistant1497926778
- William Baluch, P.A.Medical Physician Assistant1467592121
- Jae Youn Bang, LICSWClinical Social Worker1477859957
- Kevin Beene, MDFamily Medicine Physician1649731126
Verify Diana Chau in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this profession
Search for license OD61288124Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average optometrist in 2024
31 Medicare Part D claims for 22 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 39% of 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 Rosa, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Diana Chau among 1,641 optometrist records in Washington
Diana Chau, OD is one of 1,641 optometrist records with a practice address in Washington. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 90% of them.
- NPI issued2022 · 90% of these records are older, 7% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2022 · median 2010 among the 949 with a school on file
- Record last updated2026 · 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 Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Optometrist providers in Washington
There are 1,641 optometrist records in Washington.
All 1,641 in Washington → Every provider in Seattle → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Lisbeth Faulstich, O.D.Seattle, WA 981151639236896
- Stuart Frank, O.D.Seattle, WA 981151831242601
- Stephen Goo, O.D.Seattle, WA 981151619171527
- Susan Hankin, O.D.Seattle, WA 981151659409480
- Rachael Henrie, O.D.Seattle, WA 981151982794657
- Michael Hsu, O.D.Seattle, WA 981151790785251
- Scott Jamieson, O.D.Seattle, WA 981151780659102
- Lynna Kim, O.D.Seattle, WA 981151477751386
Common questions
What is Diana Chau, OD's NPI number?
Diana Chau, OD's National Provider Identifier (NPI) is 1023749041, issued on Jun 21, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Diana Chau, OD located?
The NPPES record lists a practice address at 9800 4TH Ave NE, Seattle, WA, 98115. Phone: (206) 302-1200. Providers update this record themselves, so call before visiting.
How can I verify Diana Chau, OD's license?
NPPES lists Washington license number OD61288124, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.
How much does Diana Chau, OD prescribe under Medicare Part D?
In 2024, Diana Chau, OD had 31 Medicare Part D claims for 22 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.