Christopher Tsung-Jer Chen, MD
NPI 1467865527ActiveIndividual· Internal Medicine, Medical Oncology· Stanford, CA
Internal Medicine, Medical Oncology (MD) in Stanford, California, trained at Washington University School of Medicine (class of 2014). Mostly services rather than prescriptions: Medicare paid $82,509 for 223 patients in 2024, with only 33 Part D claims. Genentech, Inc. was the largest of 2 companies reporting payments in 2025, $62.76 in all, mostly food and beverage.
Overview
| NPI | 1467865527 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 6, 2014 |
| Last updated in NPPES | Apr 17, 2024 |
| Certified by provider | Apr 17, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | A169072 | CA |
| Internal Medicine | 207R00000X | L-260076 | MA |
| Internal Medicine | 207R00000X | A169072 | CA |
| Internal Medicine, Hematology | 207RH0000X | A169072 | 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 223 |
|---|---|
| Services billed | 618 across 20 procedure codes |
| Paid by Medicare | $82,509 |
Part D prescriptions in 2024
| Prescriptions (claims) | 33 · 37 30-day fills |
|---|---|
| Patients | 17 |
| Total drug cost | $2,708 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | Washington University School of Medicine |
|---|---|
| Graduation year | 2014 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- Stanford Health CareStanford, CA · 3,122 clinicians
Hospital affiliation
- Stanford Health CareStanford, CA
Industry payments (Open Payments)
- 2025$62.76 · 2 payments from 2 companies
- 2024$1,635 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genentech, Inc. | $48.74 | 1 |
| Karyopharm Therapeutics Inc. | $14.02 | 1 |
What the 2025 payments were for
- Food and Beverage$62.76 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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