Joanna Du, M.D.
NPI 1477731677ActiveIndividual· Obstetrics & Gynecology· Upland, CA
Obstetrics & Gynecology (M.D.) with Care for Womens Medical Group Inc, practicing in Upland, California. 71 Medicare patients in 2024, $17,326 paid; nearly all of their 255 Part D prescriptions were generic (93%). Mayne Pharma Commercial LLC was the largest of 9 companies reporting payments in 2025, $194.93 in all, mostly food and beverage. Lists Pomona Valley Hospital Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1477731677 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Feb 11, 2008 |
| Last updated in NPPES | Jul 8, 2022 |
| Certified by provider | Jul 8, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | A101756 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 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 | 71 |
|---|---|
| Services billed | 168 across 23 procedure codes |
| Paid by Medicare | $17,326 |
Part D prescriptions in 2024
| Prescriptions (claims) | 255 · 436 30-day fills |
|---|---|
| Patients | 130 |
| Total drug cost | $14,612 |
| Generic share | 93% of claims |
Education and affiliations
| Graduation year | 2006 |
|---|---|
| Medicare specialty | Obstetrics/Gynecology |
| Telehealth | Offers telehealth |
Medical group
- Care for Womens Medical Group IncUpland, CA · 4 clinicians
Hospital affiliations
- Pomona Valley Hospital Medical CenterPomona, CA
- San Antonio Regional HospitalUpland, CA
Industry payments (Open Payments)
- 2025$194.93 · 14 payments from 9 companies
- 2024$521.68 · 14 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Mayne Pharma Commercial LLC | $35.67 | 5 |
| Boston Scientific Corporation | $33.64 | 1 |
| Smith+nephew, Inc. | $27.84 | 1 |
| Astellas Pharma US Inc | $23.32 | 1 |
| Exeltis, USA Inc. | $18.83 | 1 |
What the 2025 payments were for
- Food and Beverage$194.93 · 14 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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