Changyow Kwan
Ophthalmology Physician · Irvine, CA
Changyow Kwan is an ophthalmology physician with a practice address in Irvine, California, and NPI 1588110423, issued on Aug 31, 2016. Check the license (California A187362, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Changyow Kwan
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- A187362 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
- Aug 31, 2016
- Record last updated
- Jul 15, 2024
- Medicare enrollment
- Enrolled (PECOS I20240625002345); accepts Medicare assignment
- 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 Changyow Kwan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A187362Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average ophthalmology physician in 2024
602 Medicare Part D claims for 291 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 47% of claims.
Most prescribed
- Latanoprost100 claims
- Dorzolamide-Timolol78 claims
- Brimonidine Tartrate62 claims
- Brinzolamide35 claims
- Timolol Maleate32 claims
- Prednisolone Acetate30 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.
Industry payments in 2024: $390.40
8 payments; by number, the most common kind was food and beverage; the largest payer was Carl Zeiss Meditec USA, Inc. The 13,221 providers of this specialty with any payment received $4,535.02 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 2 group practices
- Regents OF The University OF CaliforniaOrange, CA
- Regional Eyecare Services PCMonterey Park, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Changyow Kwan among 2,899 ophthalmology physician records in California
Changyow Kwan 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 2016, is newer than 86% of them.
- NPI issued2016 · 86% of these records are older, 12% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2020 · median 2001 among the 1,907 with a school on file
- Record last updated2024 · 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
- Christine LinIrvine, CA 926171912224809
Common questions
What is Changyow Kwan's NPI number?
Changyow Kwan's National Provider Identifier (NPI) is 1588110423, issued on Aug 31, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Changyow Kwan 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 Changyow Kwan's license?
NPPES lists California license number A187362, 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 Changyow Kwan prescribe under Medicare Part D?
In 2024, Changyow Kwan had 602 Medicare Part D claims for 291 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.