Thanh Nga Thi Doan, M.D.
NPI 1598297459ActiveIndividual· Internal Medicine, Medical Oncology· Duarte, CA
Internal Medicine, Medical Oncology (M.D.) with City of Hope Medical Foundation, practicing in Duarte, California. Their prescriptions cost Medicare Part D more than their services did: $2,170,591 for 604 claims, against $57,693 paid for services in 2024. Genentech, Inc. was the largest of 4 companies reporting payments in 2025, $245.25 in all, mostly food and beverage.
Overview
| NPI | 1598297459 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 30, 2017 |
| Last updated in NPPES | Aug 21, 2023 |
| Certified by provider | Aug 21, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | A169643 | 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 - Medical Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 169 |
|---|---|
| Services billed | 823 across 13 procedure codes |
| Paid by Medicare | $57,693 |
Part D prescriptions in 2024
| Prescriptions (claims) | 604 · 1,064 30-day fills |
|---|---|
| Patients | 125 |
| Total drug cost | $2,170,591 |
| Generic share | 73% of claims |
Education and affiliations
| Graduation year | 2017 |
|---|---|
| Medicare specialty | Medical Oncology |
| Telehealth | Offers telehealth |
Medical group
- City of Hope Medical FoundationDuarte, CA · 982 clinicians
Industry payments (Open Payments)
- 2025$245.25 · 4 payments from 4 companies
- 2024$694.80 · 29 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genentech, Inc. | $149.51 | 1 |
| Astrazeneca Pharmaceuticals LP | $53.01 | 1 |
| Merck Sharp & Dohme LLC | $22.05 | 1 |
| Stemline Therapeutics Inc. | $20.68 | 1 |
What the 2025 payments were for
- Food and Beverage$245.25 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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