Eugene Y Chang, MD - Medicare Ophthalmology in Buena Park, CA

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Eugene Y Chang, MD is a medicare enrolled "Ophthalmology - Retina Specialist" physician in Buena Park, California. He went to Tufts University School Of Medicine and graduated in 2000 and has 26 years of diverse experience with area of expertise as Ophthalmology. He is a member of the group practice Azul Vision Inc, California Eye Specialists Medical Group Inc and his current practice location is 5832 Beach Blvd Unit 109, Buena Park, California. You can reach out to his office (for appointments etc.) via phone at (714) 228-1888.

Eugene Y Chang is licensed to practice in California (license number A77825) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1265432991.

Contact Information

Eugene Y Chang, MD
5832 Beach Blvd Unit 109,
Buena Park, CA 90621-5500
(714) 228-1888
(714) 676-1984

Map and Direction




Physician's Profile

Full NameEugene Y Chang
GenderMale
SpecialityOphthalmology
Experience26 Years
Location5832 Beach Blvd Unit 109, Buena Park, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Eugene Y Chang attended and graduated from Tufts University School Of Medicine in 2000
  NPI Data:
  • NPI Number: 1265432991
  • Provider Enumeration Date: 07/22/2005
  • Last Update Date: 05/29/2026
  Medicare PECOS Information:
  • PECOS PAC ID: 3375514383
  • Enrollment ID: I20070215000642

Medical Identifiers

Medical identifiers for Eugene Y Chang such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1265432991NPI-NPPES
036111048MedicaidIL
1265432991MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207W00000XOphthalmology 036111048 (Illinois)Secondary
207W00000XOphthalmology MD183525 (Oregon)Secondary
207WX0107XOphthalmology - Retina Specialist A77825 (California)Primary
207WX0107XOphthalmology - Retina Specialist MD183525 (Oregon)Secondary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Azul Vision Inc226485174048
California Eye Specialists Medical Group Inc680079338128

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Eugene Y Chang allows following entities to bill medicare on his behalf.
Entity NameCalifornia Eye Specialists Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1699713099
PECOS PAC ID: 6800793381
Enrollment ID: O20031212000932
Entity NameEyecare Specialists Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1437181930
PECOS PAC ID: 2264322080
Enrollment ID: O20040318000884
Entity NameEyecare Specialists Medical Group Inc
Entity TypePart B Supplier - Ambulatory Surgical Center
Entity IdentifiersNPI Number: 1871057786
PECOS PAC ID: 2264322080
Enrollment ID: O20191028002978
Entity NameAzul Vision Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1285247528
PECOS PAC ID: 2264851740
Enrollment ID: O20201001003562

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Eugene Y Chang is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Eugene Y Chang, MD
Po Box 190,
Buena Park, CA 90621-0190

Ph: (714) 228-1888		Eugene Y Chang, MD
5832 Beach Blvd Unit 109,
Buena Park, CA 90621-5500

Ph: (714) 228-1888

Reviews and Comments


Ophthalmology Doctors in Buena Park, CA

Dr. Alejandra Uchio, M.D.
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 5832 Beach Blvd Unit 109, Buena Park, CA 90621
Phone: 714-228-1888    Fax: 714-676-1984
Mrs. Yun J Kim, MD
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 5832 Beach Blvd Unit 109a, Buena Park, CA 90621
Phone: 714-228-1888    Fax: 714-676-8308
Mr. Joseph Y Lee, MD
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 5832 Beach Blvd Unit 109a, Buena Park, CA 90621
Phone: 714-228-1888    Fax: 714-676-8308
Inja Kim, M.D.
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 5972 Beach Blvd, Buena Park, CA 90621
Phone: 714-562-5857    
Michael Bahren Choi, M.D.
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 6102 Beach Blvd, Buena Park, CA 90621
Phone: 714-868-7733    Fax: 213-556-1753

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.