Sean Tsao, M.D.
Ophthalmology Physician · Irvine, CA
Sean Tsao, M.D. is an ophthalmology physician with a practice address in Irvine, California, and NPI 1841550217, issued on May 20, 2012. Check the license (California A128498, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sean Tsao
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- A128498 CA
Self-reported in NPPES; status is on the state search - Practice location
- 850 Health Sciences RD, Irvine, CA 92617
- Phone
- (949) 824-2020
- Enumerated
- May 20, 2012
- Record last updated
- Dec 3, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160509001727); accepts Medicare assignment
- Medical or professional school
- University Of California, Irvine, California College Of Medicine, 2012
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 850 Health Sciences RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ashraf Ahmad, M.D.Ophthalmology Physician1689108425
- Yosur AlsulaimanOphthalmology Physician1457204661
- Andrew Browne, M.D., PH.D.Retina Specialist (Ophthalmology) Physician1154615383
- Teresa Chen, MDOphthalmology Physician1679034367
- Katherine Chuang, MDOphthalmology Physician1356831929
- Robert Crow, MDNeuro-ophthalmology Physician1285646398
Verify Sean Tsao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A128498Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% fewer Medicare Part D claims than the average ophthalmology physician in 2024
1,103 Medicare Part D claims for 287 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Latanoprost239 claims
- Dorzolamide-Timolol137 claims
- Timolol Maleate127 claims
- Prednisolone Acetate116 claims
- Cyclosporine110 claims
- Brimonidine Tartrate89 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
- Southern California Permanente Medical GroupSanta Ana, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sean Tsao among 2,899 ophthalmology physician records in California
Sean Tsao, M.D. is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 78% of them.
- NPI issued2012 · 78% of these records are older, 20% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2012 · median 2001 among the 1,907 with a school on file
- Record last updated2021 · 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 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in Irvine → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Ashraf Ahmad, M.D.Irvine, CA 926171689108425
- Yosur AlsulaimanIrvine, CA 926171457204661
- Teresa Chen, MDIrvine, CA 926171679034367
- Katherine Chuang, MDIrvine, CA 926171356831929
- Lisa Collea, MDIrvine, CA 926171023174182
- Terry Hsieh, MD, PHDIrvine, CA 926171497251367
- Kevin Jwo, M.D.Irvine, CA 926171346501137
- Changyow KwanIrvine, CA 926171588110423
Common questions
What is Sean Tsao, M.D.'s NPI number?
Sean Tsao, M.D.'s National Provider Identifier (NPI) is 1841550217, issued on May 20, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Sean Tsao, M.D. located?
The NPPES record lists a practice address at 850 Health Sciences RD, Irvine, CA, 92617. Phone: (949) 824-2020. Providers update this record themselves, so call before visiting.
How can I verify Sean Tsao, M.D.'s license?
NPPES lists California license number A128498, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Sean Tsao, M.D. prescribe under Medicare Part D?
In 2024, Sean Tsao, M.D. had 1,103 Medicare Part D claims for 287 beneficiaries; the average among ophthalmology physician prescribers was 1,518. 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.