Zheng Zhu Topp, M.D.
NPI 1023212784ActiveIndividual· Internal Medicine, Medical Oncology· Portland, OR
Internal Medicine, Medical Oncology (M.D.) in Portland, Oregon, trained at University of Mississippi School of Medicine (class of 2007). Their prescriptions cost Medicare Part D more than their services did: $1,572,329 for 1,553 claims, against $49,332 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 4 companies reporting payments in 2025, $309.02 in all, mostly food and beverage.
Overview
| NPI | 1023212784 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 14, 2007 |
| Last updated in NPPES | Oct 13, 2021 |
| Certified by provider | Oct 13, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | MD203826 | OR |
| Internal Medicine, Hematology & Oncology | 207RH0003X | ME121637 | FL |
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 - Medical Oncology (OR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 207 |
|---|---|
| Services billed | 716 across 13 procedure codes |
| Paid by Medicare | $49,332 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,553 · 3,399 30-day fills |
|---|---|
| Patients | 346 |
| Total drug cost | $1,572,329 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | University of Mississippi School of Medicine |
|---|---|
| Graduation year | 2007 |
| Medicare specialty | Medical Oncology |
| Secondary specialties | Hematology |
| Telehealth | Offers telehealth |
Medical group
- Providence Health and Services OregonPortland, OR · 1,433 clinicians
Hospital affiliations
- Adventist Health TillamookTillamook, OR
- Providence Portland Medical CenterPortland, OR
- Providence St Vincent Medical CenterPortland, OR
Other facilities
- Providence HospiceHospice · Portland, OR
Industry payments (Open Payments)
- 2025$309.02 · 4 payments from 4 companies
- 2024$2,612 · 7 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $125.00 | 1 |
| Genentech USA, Inc. | $85.87 | 1 |
| Novartis Pharmaceuticals Corporation | $66.90 | 1 |
| Gilead Sciences, Inc. | $31.25 | 1 |
What the 2025 payments were for
- Food and Beverage$309.02 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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