Diane Tseng, MD,PHD
NPI 1164862785ActiveIndividual· Internal Medicine, Medical Oncology· Seattle, WA
Internal Medicine, Medical Oncology (MD,PHD) with The Association of University Physicians, practicing in Seattle, Washington. Their prescriptions cost Medicare Part D more than their services did: $452,482 for 130 claims, against $26,013 paid for services in 2024. Genentech, Inc. was the largest of 2 companies reporting payments in 2025, $102,493 in all, mostly grants. Lists University of Washington Medical Ctr as a hospital affiliation.
Overview
| NPI | 1164862785 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD,PHD |
| Sole proprietor | No |
| NPI issued | Jun 27, 2013 |
| Last updated in NPPES | Jun 10, 2020 |
| Certified by provider | Jun 10, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | MD61038846 | WA |
| Internal Medicine | 207R00000X | MD61038846 | WA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Medical Oncology (WA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 76 |
|---|---|
| Services billed | 343 across 12 procedure codes |
| Paid by Medicare | $26,013 |
Part D prescriptions in 2024
| Prescriptions (claims) | 130 · 146 30-day fills |
|---|---|
| Patients | 33 |
| Total drug cost | $452,482 |
| Generic share | 68% of claims |
Education and affiliations
| Graduation year | 2013 |
|---|---|
| Medicare specialty | Medical Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- The Association of University PhysiciansSeattle, WA · 3,535 clinicians
Hospital affiliation
- University of Washington Medical CtrSeattle, WA
Industry payments (Open Payments)
- 2025$102,493 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genentech, Inc. | $99,996 | 1 |
| Astrazeneca Pharmaceuticals LP | $2,497 | 2 |
What the 2025 payments were for
- Grant$99,996 · 1 payment
- Consulting Fee$2,400 · 1 payment
- Food and Beverage$96.71 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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