Olivia Hui-Chiun Chang, M.D., M.P.H.
NPI 1881936862ActiveIndividual· Obstetrics & Gynecology, Urogynecology and Reconstructive Pelvic Surgery· Orange, CA
Obstetrics & Gynecology, Urogynecology and Reconstructive Pelvic Surgery (M.D., M.P.H.) in Orange, California, trained at Tulane University School of Medicine (class of 2013). Their prescriptions cost Medicare Part D more than their services did: $220,796 for 568 claims, against $137,288 paid for services in 2024. Coloplast Corp was the largest of 6 companies reporting payments in 2025, $1,278 in all, mostly food and beverage.
Overview
| NPI | 1881936862 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., M.P.H. |
| Sole proprietor | No |
| NPI issued | Mar 18, 2013 |
| Last updated in NPPES | Feb 3, 2023 |
| Certified by provider | Jan 27, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology, Urogynecology and Reconstructive Pelvic Surgery Primary | 207VF0040X | A182272 | CA |
| Obstetrics & Gynecology | 207V00000X | MD61185981 | WA |
| Obstetrics & Gynecology | 207V00000X | A182272 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Obstetrics/Gynecology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 291 |
|---|---|
| Services billed | 4,704 across 69 procedure codes |
| Paid by Medicare | $137,288 |
Part D prescriptions in 2024
| Prescriptions (claims) | 568 · 1,090 30-day fills |
|---|---|
| Patients | 201 |
| Total drug cost | $220,796 |
| Generic share | 59% of claims |
Education and affiliations
| Medical school | Tulane University School of Medicine |
|---|---|
| Graduation year | 2013 |
| Medicare specialty | Obstetrics/Gynecology |
| Telehealth | Offers telehealth |
Medical group
- Uci Department of UrologyOrange, CA · 52 clinicians
Hospital affiliations
- Hoag Memorial Hospital PresbyterianNewport Beach, CA
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$1,278 · 24 payments from 6 companies
- 2024$979.49 · 22 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Coloplast Corp | $504.76 | 5 |
| Medtronic, Inc. | $318.46 | 12 |
| Calyxo, Inc. | $225.75 | 3 |
| Bluewind Medical | $182.25 | 2 |
| Applied Medical Resources Corporation | $31.57 | 1 |
What the 2025 payments were for
- Food and Beverage$1,278 · 24 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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