Andrew Cho Tsen, MD
NPI 1659364719ActiveIndividual· Thoracic Surgery (Cardiothoracic Vascular Surgery)· Portland, OR
Thoracic Surgery (Cardiothoracic Vascular Surgery) (MD) in Portland, Oregon, trained at University of Kansas School of Med (Kc/Wich/Sal) (class of 1988). Mostly services rather than prescriptions: Medicare paid $25,598 for 41 patients in 2024, with only 27 Part D claims. Abiomed was the largest of 11 companies reporting payments in 2025, $580.42 in all, mostly food and beverage.
Overview
| NPI | 1659364719 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 24, 2005 |
| Last updated in NPPES | Sep 26, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Thoracic Surgery (Cardiothoracic Vascular Surgery) Primary | 208G00000X | MD20029 | OR |
| Thoracic Surgery (Cardiothoracic Vascular Surgery) | 208G00000X | 21592 | AZ |
| Thoracic Surgery (Cardiothoracic Vascular Surgery) | 208G00000X | MD00043090 | WA |
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 - Thoracic Surgery (OR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 41 |
|---|---|
| Services billed | 77 across 28 procedure codes |
| Paid by Medicare | $25,598 |
Part D prescriptions in 2024
| Prescriptions (claims) | 27 · 46 30-day fills |
|---|---|
| Patients | 17 |
| Total drug cost | $2,384 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | University of Kansas School of Med (Kc/Wich/Sal) |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Thoracic Surgery |
Medical group
- Legacy Clinics LLCPortland, OR · 713 clinicians
Hospital affiliations
- Legacy Emanuel Medical CenterPortland, OR
- Legacy Good Samaritan Medical CenterPortland, OR
Industry payments (Open Payments)
- 2025$580.42 · 28 payments from 11 companies
- 2024$817.99 · 21 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abiomed | $174.56 | 11 |
| Merck Sharp & Dohme LLC | $80.73 | 3 |
| Artivion, Inc. | $76.70 | 3 |
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $56.62 | 3 |
| Medical Device Business Services, Inc. | $40.15 | 1 |
What the 2025 payments were for
- Food and Beverage$580.42 · 28 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 49 cardiothoracic surgeons in Portland · All cardiothoracic surgeons in Oregon