Olivia Hui-Chiun Chang, M.D., M.P.H.
Urogynecology and Reconstructive Pelvic Surgery (Obstetrics & Gynecology) Physician · Orange, CA
Olivia Hui-Chiun Chang, M.D., M.P.H. is a urogynecology and reconstructive pelvic surgery (obstetrics & gynecology) physician with a practice address in Orange, California, and NPI 1881936862, issued on Mar 18, 2013. Check the license (California A182272, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Olivia Hui-Chiun Chang
- Credential
- M.D., M.P.H.
- Primary taxonomy
- Urogynecology and Reconstructive Pelvic Surgery (Obstetrics & Gynecology) Physician 207VF0040X
- License numbers
- A182272 CA
MD61185981 WA
Self-reported in NPPES; status is on the state search - Practice location
- 101 The City Dr S, Orange, CA 92868
- Phone
- (714) 880-7812
- Enumerated
- Mar 18, 2013
- Record last updated
- Feb 3, 2023
- Medicare enrollment
- Enrolled (PECOS I20221017003168); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest urogynecology and reconstructive pelvic surgery (obstetrics & gynecology) physician records → All 108 in California → Look up another NPI →
Also registered at 101 The City Dr S
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danny Abad, PAPhysician Assistant1477158673
- Edward AbaradoStudent in an Organized Health Care Education/Training Program1912855198
- Nagina Abdiani, DOGeriatric Medicine (Family Medicine) Physician1518543271
- Mariam Abdul-Latif, M.D.Pediatrics Physician1538418884
- Eric AbelloOtolaryngology Physician1922566215
- Brandon Abeyta, MDAnesthesiology Physician1841291804
Verify Olivia Hui-Chiun Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A182272Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% fewer Medicare Part D claims than the average urogynecology and reconstructive pelvic surgery (obstetrics & gynecology) physician in 2024
568 Medicare Part D claims for 201 beneficiaries, against an average of 732 among the 998 providers of this specialty who prescribed in Part D.
Most prescribed
- Gemtesa140 claims
- Estradiol115 claims
- Myrbetriq72 claims
- Sulfamethoxazole-Trimethoprim66 claims
- Methenamine Hippurate42 claims
- Nitrofurantoin Mono-Macro24 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: $979.49
22 payments; by number, the most common kind was food and beverage; the largest payer was Bluewind Medical. The 864 providers of this specialty with any payment received $2,558.52 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 one group practice
- Uci Department OF UrologyOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Olivia Hui-Chiun Chang among 108 urogynecology and reconstructive pelvic surgery (obstetrics & gynecology) physician records in California
Olivia Hui-Chiun Chang, M.D., M.P.H. is one of 108 urogynecology and reconstructive pelvic surgery (obstetrics & gynecology) physician records with a practice address in California. 96% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 69% of them.
- NPI issued2013 · 69% of these records are older, 27% newer
- In a Medicare fileYes · 96% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated2013 · median 2004 among the 89 with a school on file
- Record last updated2023 · 36% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VF0040X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Urogynecology and Reconstructive Pelvic Surgery (Obstetrics & Gynecology) Physician providers in California
There are 108 urogynecology and reconstructive pelvic surgery (obstetrics & gynecology) physician records in California.
All 108 in California → Every provider in Orange → Urogynecology and Reconstructive Pelvic Surgery (Obstetrics & Gynecology) Physician nationwide →
The 8 urogynecology and reconstructive pelvic surgery (obstetrics & gynecology) physician records with the nearest ZIP codes
- Taylor Brueseke, MDOrange, CA 928681821304882
- Kristen Buono, M.D.Orange, CA 928681245573039
- Felicia Lane, MDOrange, CA 928681962582098
- Karla Lorente, MDOrange, CA 928681467956672
- Emily Wolverton, MDOrange, CA 928681679214043
- Neha Sudol, MDAnaheim, CA 928061891055075
- William Han, M.D.Fountain Valley, CA 927081043300114
- Sam Hessami, MDSanta Ana, CA 927041831167162
Common questions
What is Olivia Hui-Chiun Chang, M.D., M.P.H.'s NPI number?
Olivia Hui-Chiun Chang, M.D., M.P.H.'s National Provider Identifier (NPI) is 1881936862, issued on Mar 18, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Olivia Hui-Chiun Chang, M.D., M.P.H. located?
The NPPES record lists a practice address at 101 The City Dr S, Orange, CA, 92868. Phone: (714) 880-7812. Providers update this record themselves, so call before visiting.
How can I verify Olivia Hui-Chiun Chang, M.D., M.P.H.'s license?
NPPES lists California license number A182272, 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 Olivia Hui-Chiun Chang, M.D., M.P.H. prescribe under Medicare Part D?
In 2024, Olivia Hui-Chiun Chang, M.D., M.P.H. had 568 Medicare Part D claims for 201 beneficiaries; the average among urogynecology and reconstructive pelvic surgery (obstetrics & gynecology) physician prescribers was 732. 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.