Carol Weichi Chen, MD
NPI 1700147030ActiveIndividual· Thoracic Surgery (Cardiothoracic Vascular Surgery)· Stanford, CA
Thoracic Surgery (Cardiothoracic Vascular Surgery) (MD) with Stanford Health Care and 1 other group, practicing in Stanford, California. Mostly services rather than prescriptions: Medicare paid $59,894 for 72 patients in 2024, with only 30 Part D claims. Transmedics, Inc. was the largest of 6 companies reporting payments in 2025, $2,470 in all, mostly travel and lodging. Lists Sequoia Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1700147030 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 4, 2012 |
| Last updated in NPPES | Jul 7, 2025 |
| Certified by provider | Jul 7, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Thoracic Surgery (Cardiothoracic Vascular Surgery) Primary | 208G00000X | A160709 | CA |
| Transplant Surgery | 204F00000X | 4301511111 | MI |
| Thoracic Surgery (Cardiothoracic Vascular Surgery) | 208G00000X | 4301511111 | MI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Cardiac Surgery (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 72 |
|---|---|
| Services billed | 198 across 55 procedure codes |
| Paid by Medicare | $59,894 |
Part D prescriptions in 2024
| Prescriptions (claims) | 30 · 35 30-day fills |
|---|---|
| Patients | 13 |
| Total drug cost | $1,046 |
| Generic share | 93% of claims |
Education and affiliations
| Graduation year | 2012 |
|---|---|
| Medicare specialty | Cardiac Surgery |
| Secondary specialties | Thoracic Surgery, Vascular Surgery |
| Telehealth | Offers telehealth |
Medical groups
- Stanford Health CareStanford, CA · 3,122 clinicians
- Dignity Health Medical FoundationFolsom, CA · 1,184 clinicians
Hospital affiliations
- Sequoia HospitalRedwood City, CA
- Stanford Health CareStanford, CA
Industry payments (Open Payments)
- 2025$2,470 · 11 payments from 6 companies
- 2024$1,606 · 11 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Transmedics, Inc. | $1,887 | 1 |
| Abbott Laboratories | $277.25 | 4 |
| Atricure, Inc. | $163.50 | 1 |
| Edwards Lifesciences Corporation | $93.14 | 2 |
| Abiomed | $34.25 | 2 |
What the 2025 payments were for
- Travel and Lodging$2,091 · 4 payments
- Food and Beverage$378.92 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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