Eugene Y. Chang, MD
Retina Specialist (Ophthalmology) Physician · Buena Park, CA
Eugene Y. Chang, MD is a retina specialist (ophthalmology) physician with a practice address in Buena Park, California, and NPI 1265432991, issued on Jul 22, 2005. Check the license (California A77825, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Eugene Y. Chang
- Credential
- MD
- Primary taxonomy
- Retina Specialist (Ophthalmology) Physician 207WX0107X
- License numbers
- A77825 CA
036111048 IL
MD183525 OR
Self-reported in NPPES; status is on the state search - Practice location
- 5832 Beach Blvd Unit 109, Buena Park, CA 90621
- Phone
- (714) 228-1888
- Enumerated
- Jul 22, 2005
- Record last updated
- May 29, 2026
- Fax
- (714) 676-1984
- Medicaid IDs
- 036111048 IL
1265432991 CA - Medicare enrollment
- Enrolled (PECOS I20070215000642); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 2000
- Entity
- Type 1 · individual
8 nearest retina specialist (ophthalmology) physician records → All 205 in California → Look up another NPI →
Also registered at 5832 Beach Blvd Unit 109
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Erica Baranwal, O.D.Optometrist1912389354
- Jack Kim, O.D.Optometrist1679808356
- Alejandra Uchio, M.D.Ophthalmology Physician1144217191
Verify Eugene Y. Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A77825Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6.5 times the Medicare Part D claims of the average retina specialist (ophthalmology) physician in 2024
4,014 Medicare Part D claims for 874 beneficiaries, against an average of 620 among the 1,449 providers of this specialty who prescribed in Part D.
Most prescribed
- Latanoprost1,054 claims
- Dorzolamide-Timolol958 claims
- Brimonidine Tartrate463 claims
- Prednisolone Acetate325 claims
- Timolol Maleate184 claims
- Dorzolamide Hcl161 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: $1,242.73
21 payments; by number, the most common kind was food and beverage; the largest payer was Bausch & Lomb Americas Inc. The 1,253 providers of this specialty with any payment received $7,667.49 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
- Azul Vision IncPasadena, CA
- California Eye Specialists Medical Group IncPasadena, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Eugene Y. Chang among 205 retina specialist (ophthalmology) physician records in California
Eugene Y. Chang, MD is one of 205 retina specialist (ophthalmology) physician records with a practice address in California. 98% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 98% of these records are
- In the CMS Doctors and Clinicians fileYes · 92% of these records are
- Graduated2000 · median 2007 among the 189 with a school on file
- Record last updated2026 · 37% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207WX0107X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Retina Specialist (Ophthalmology) Physician providers in California
There are 205 retina specialist (ophthalmology) physician records in California.
All 205 in California → Every provider in Buena Park → Retina Specialist (Ophthalmology) Physician nationwide →
The 8 retina specialist (ophthalmology) physician records with the nearest ZIP codes
- Glen Jarus, MDWhittier, CA 906011619952306
- Timothy Peiris, MDSanta Fe Springs, CA 906701295234276
- Darren Knight, MDLong Beach, CA 908061891181095
- Anthony Debeus, MDLong Beach, CA 908071962474247
- Viren Rana, DOLong Beach, CA 908071275190969
- Roberto Roizenblatt, M.D., PH.D.Long Beach, CA 908081952564064
- Svetlana Pilyugina, M.D.Santa Monica, CA 904041538294129
- James Peace, M.D. INCInglewood, CA 903011497836423
Common questions
What is Eugene Y. Chang, MD's NPI number?
Eugene Y. Chang, MD's National Provider Identifier (NPI) is 1265432991, issued on Jul 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Eugene Y. Chang, MD located?
The NPPES record lists a practice address at 5832 Beach Blvd Unit 109, Buena Park, CA, 90621. Phone: (714) 228-1888. Providers update this record themselves, so call before visiting.
How can I verify Eugene Y. Chang, MD's license?
NPPES lists California license number A77825, 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 Eugene Y. Chang, MD prescribe under Medicare Part D?
In 2024, Eugene Y. Chang, MD had 4,014 Medicare Part D claims for 874 beneficiaries; the average among retina specialist (ophthalmology) physician prescribers was 620. 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.