David Chan, MD
NPI 1972591378ActiveIndividual· Internal Medicine, Hematology & Oncology· Torrance, CA
Internal Medicine, Hematology & Oncology (MD) in Torrance, California, trained at University of California, Geffen School of Medicine (class of 1979). Their prescriptions cost Medicare Part D more than their services did: $2,847,712 for 1,000 claims, against $1,578,753 paid for services in 2024. Insightec,inc was the largest of 6 companies reporting payments in 2025, $504.67 in all, mostly food and beverage.
Overview
| NPI | 1972591378 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 10, 2005 |
| Last updated in NPPES | Dec 27, 2019 |
| Certified by provider | Dec 27, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | G43553 | CA |
| Internal Medicine, Medical Oncology | 207RX0202X | G43553 | 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 | 356 |
|---|---|
| Services billed | 111,376 across 68 procedure codes |
| Paid by Medicare | $1,578,753 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,000 · 2,231 30-day fills |
|---|---|
| Patients | 213 |
| Total drug cost | $2,847,712 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 1979 |
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Torrance Health Association IncRedondo Beach, CA · 299 clinicians
Hospital affiliations
- Providence Little Company of Mary Med Ctr TorranceTorrance, CA
- Torrance Memorial Medical CenterTorrance, CA
Industry payments (Open Payments)
- 2025$504.67 · 16 payments from 6 companies
- 2024$329.55 · 21 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Insightec,inc | $147.04 | 1 |
| Astrazeneca Pharmaceuticals LP | $137.34 | 6 |
| Puma Biotechnology, Inc. | $89.61 | 4 |
| Array Biopharma Inc | $80.11 | 3 |
| Accord Healthcare, Inc. | $30.16 | 1 |
What the 2025 payments were for
- Food and Beverage$504.67 · 16 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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