Ernest Whanwook Chang, M.D. PH.D.
NPI 1861927956ActiveIndividual· Internal Medicine, Cardiovascular Disease· Westwood, NJ
Internal Medicine, Cardiovascular Disease (M.D. PH.D.) in Westwood, New Jersey, trained at Columbia University College of Physicians and Surgeons (class of 2017). Their prescriptions cost Medicare Part D more than their services did: $75,213 for 313 claims, against $43,335 paid for services in 2024. Edwards Lifesciences Corporation reported $1,839 in payments in 2025, mostly travel and lodging.
Overview
| NPI | 1861927956 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. PH.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 26, 2017 |
| Last updated in NPPES | Jun 12, 2024 |
| Certified by provider | Jun 12, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 296481 | NY |
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 - Cardiovascular Disease (Cardiology) (NJ); Practitioner - Cardiovascular Disease (Cardiology) (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 353 |
|---|---|
| Services billed | 764 across 38 procedure codes |
| Paid by Medicare | $43,335 |
Part D prescriptions in 2024
| Prescriptions (claims) | 313 · 753 30-day fills |
|---|---|
| Patients | 76 |
| Total drug cost | $75,213 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | Columbia University College of Physicians and Surgeons |
|---|---|
| Graduation year | 2017 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical group
- Valley Physician Services PCReading, PA · 592 clinicians
Hospital affiliations
- Holy Name Medical CenterTeaneck, NJ
- Valley HospitalParamus, NJ
Industry payments (Open Payments)
- 2025$1,839 · 9 payments from 1 company
- 2024$25.71 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Edwards Lifesciences Corporation | $1,839 | 9 |
What the 2025 payments were for
- Travel and Lodging$1,424 · 5 payments
- Food and Beverage$415.78 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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