Dr Ian Chang, DO - Medicare Internal Medicine in Orange, CA

Dr Ian Chang, DO is a medicare enrolled "Internal Medicine - Rheumatology" physician in Orange, California. He went to Michigan State University College Of Osteopathic Medicine and graduated in 2012 and has 12 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Uc Regents and his current practice location is 101 The City Dr S Bldg 30, Orange, California. You can reach out to his office (for appointments etc.) via phone at (714) 456-7720.

Dr Ian Chang is licensed to practice in California (license number 20A16850) 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 1407116411.

Contact Information

Dr Ian Chang, DO
101 The City Dr S Bldg 30,
Orange, CA 92868-3201
(714) 456-7720
Not Available

Map and Direction




Physician's Profile

Full NameDr Ian Chang
GenderMale
SpecialityInternal Medicine
Experience12 Years
Location101 The City Dr S Bldg 30, Orange, 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:
  • Dr Ian Chang attended and graduated from Michigan State University College Of Osteopathic Medicine in 2012
  NPI Data:
  • NPI Number: 1407116411
  • Provider Enumeration Date: 05/23/2012
  • Last Update Date: 03/29/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 6608152020
  • Enrollment ID: I20190225002177

Medical Identifiers

Medical identifiers for Dr Ian Chang such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1407116411NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 5101019682 (Michigan)Secondary
207RR0500XInternal Medicine - Rheumatology 20A16850 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
University Of California Irvine Medical CenterOrange, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Uc Regents7416869516205

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. Dr Ian Chang allows following entities to bill medicare on his behalf.
Entity NameUc Regents
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1760430847
PECOS PAC ID: 7416869516
Enrollment ID: O20031118000906

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. Dr Ian 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
Dr Ian Chang, DO
200 S Manchester Ave Ste 300,
Orange, CA 92868-3219

Ph: (714) 456-2986
Dr Ian Chang, DO
101 The City Dr S Bldg 30,
Orange, CA 92868-3201

Ph: (714) 456-7720

Reviews and Comments


Internal Medicine Doctors in Orange, CA

Michael Cheng, DO
Rheumatology
Medicare: Accepting Medicare Assignments
Practice Location: 101 The City Dr S, Orange, CA 92868
Phone: 714-456-7110    
Harry Nguyen, D.O.
Rheumatology
Medicare: Medicare Enrolled
Practice Location: 101 The City Dr S, Orange, CA 92868
Phone: 714-456-7002    
Millie Arora,
Rheumatology
Medicare: Accepting Medicare Assignments
Practice Location: 101 The City Dr S, City Tower, Suite 400, Orange, CA 92868
Phone: 714-456-5691    Fax: 714-456-8874
Dr. Sarah Jeanette Ettinger, M.D.
Rheumatology
Medicare: Medicare Enrolled
Practice Location: 101 The City Dr S, Orange, CA 92868
Phone: 714-456-5135    
Dr. Antonio Halais Frangieh, MD, MPH
Rheumatology
Medicare: Accepting Medicare Assignments
Practice Location: 101 The City Dr S, Orange, CA 92868
Phone: 714-456-7890    
Dr. Andy Yen-tang Lee, MD
Rheumatology
Medicare: Accepting Medicare Assignments
Practice Location: 101 The City Dr S, Orange, CA 92868
Phone: 714-456-7890    
Dr. Jesse John Goitia Jr., M.D.
Rheumatology
Medicare: Medicare Enrolled
Practice Location: 101 The City Dr S, Orange, CA 92868
Phone: 714-880-7812    

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).

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