Derrick Weison Su, MD
NPI 1740569789ActiveIndividual· Specialist· Fountain Valley, CA
Specialist (MD) in Fountain Valley, California, trained at Boston University School of Medicine (class of 2011). Their prescriptions cost Medicare Part D more than their services did: $7,368,075 for 1,594 claims, against $1,714,808 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 64 companies reporting payments in 2025, $10,310 in all, mostly food and beverage.
Overview
| NPI | 1740569789 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 9, 2011 |
| Last updated in NPPES | May 15, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | A125217 | 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 - Hematology/Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 145 |
|---|---|
| Services billed | 71,343 across 81 procedure codes |
| Paid by Medicare | $1,714,808 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,594 · 2,222 30-day fills |
|---|---|
| Patients | 270 |
| Total drug cost | $7,368,075 |
| Generic share | 55% of claims |
Education and affiliations
| Medical school | Boston University School of Medicine |
|---|---|
| Graduation year | 2011 |
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Los Angeles Hematology-Oncology Medical GroupVan Nuys, CA · 50 clinicians
Hospital affiliations
- Hoag Memorial Hospital PresbyterianNewport Beach, CA
- Memorialcare Orange Coast Medical CenterFountain Valley, CA
- Memorialcare Saddleback Medical CenterLaguna Hills, CA
- Providence Mission HospitalMission Viejo, CA
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$10,310 · 392 payments from 64 companies
- 2024$9,738 · 401 payments from 53 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $1,487 | 31 |
| Astrazeneca Pharmaceuticals LP | $580.85 | 23 |
| Merck Sharp & Dohme LLC | $458.32 | 16 |
| Abbvie Inc. | $448.20 | 22 |
| Janssen Biotech, Inc. | $417.84 | 19 |
What the 2025 payments were for
- Food and Beverage$9,277 · 379 payments
- Long term medical supply or device loan$999.96 · 12 payments
- Education$32.72 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Specialist providers in Fountain Valley
- 1740524958
- 1316169105
- 1659420495
- 1710305602
- 1548248032
- 1548473614
- 1972904084
- 1609080100
- 1083844823
- 1386858322
- 1902058670
- 1205251147