Chun-Yang Michael Chang, MD
NPI 1033106034ActiveIndividual· Internal Medicine, Gastroenterology· Oregon City, OR
Internal Medicine, Gastroenterology (MD) in Oregon City, Oregon, trained at Baylor College of Medicine (class of 1996). Their prescriptions cost Medicare Part D more than their services did: $157,263 for 426 claims, against $56,759 paid for services in 2024. Janssen Biotech, Inc. reported $31.95 in payments in 2024, mostly food and beverage.
Overview
| NPI | 1033106034 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 4, 2005 |
| Last updated in NPPES | Nov 28, 2023 |
| Certified by provider | Nov 28, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | MD23576 | OR |
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 - Gastroenterology (OR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 183 |
|---|---|
| Services billed | 1,671 across 34 procedure codes |
| Paid by Medicare | $56,759 |
Part D prescriptions in 2024
| Prescriptions (claims) | 426 · 718 30-day fills |
|---|---|
| Patients | 207 |
| Total drug cost | $157,263 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | Baylor College of Medicine |
|---|---|
| Graduation year | 1996 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- The Oregon Clinic, PCPortland, OR · 362 clinicians
Hospital affiliations
- Legacy Meridian Park Medical CenterTualatin, OR
- Providence Milwaukie HospitalMilwaukie, OR
- Providence Newberg Medical CenterNewberg, OR
- Providence Willamette Falls Medical CenterOregon City, OR
Industry payments (Open Payments)
- 2024$31.95 · 1 payment from 1 company
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $31.95 | 1 |
What the 2024 payments were for
- Food and Beverage$31.95 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Internal Medicine, Gastroenterology providers in Oregon →