Hyunseok Kang, MD
NPI 1316108509ActiveIndividual· Internal Medicine, Medical Oncology· Stanford, CA
Internal Medicine, Medical Oncology (MD) with Stanford Health Care and 3 other groups, practicing in Stanford, California. Their prescriptions cost Medicare Part D more than their services did: $1,336,215 for 209 claims, against $53,989 paid for services in 2024. Coherus Biosciences Inc. was the largest of 3 companies reporting payments in 2024, $4,294 in all, mostly speaking and faculty fees. Lists Stanford Health Care and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1316108509 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 19, 2008 |
| Last updated in NPPES | Dec 8, 2025 |
| Certified by provider | Dec 8, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | C156305 | CA |
| Internal Medicine | 207R00000X | C156305 | CA |
| Internal Medicine, Hematology & Oncology | 207RH0003X | 67057 | GA |
| Internal Medicine, Hematology & Oncology | 207RH0003X | C156305 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Medical Oncology (CA); Practitioner - Medical Oncology (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 135 |
|---|---|
| Services billed | 598 across 13 procedure codes |
| Paid by Medicare | $53,989 |
Part D prescriptions in 2024
| Prescriptions (claims) | 209 · 218 30-day fills |
|---|---|
| Patients | 58 |
| Total drug cost | $1,336,215 |
| Generic share | 61% of claims |
Education and affiliations
| Graduation year | 2002 |
|---|---|
| Medicare specialty | Medical Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Stanford Health CareStanford, CA · 3,122 clinicians
- University of California San FranciscoSan Francisco, CA · 1,839 clinicians
- UCSF Medical Group Business ServicesSan Francisco, CA · 1,598 clinicians
- Regents of the University of CaliforniaSan Francisco, CA · 732 clinicians
Hospital affiliations
- Stanford Health CareStanford, CA
- Stanford Health Care Tri-ValleyPleasanton, CA
- UCSF Medical CenterSan Francisco, CA
Industry payments (Open Payments)
- 2024$4,294 · 5 payments from 3 companies
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Coherus Biosciences Inc. | $3,962 | 3 |
| Genzyme Corporation | $200.00 | 1 |
| Regeneron Healthcare Solutions, Inc. | $131.63 | 1 |
What the 2024 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$3,950 · 2 payments
- Food and Beverage$343.64 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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