Michael Shihjay Chen, M.D.
NPI 1023005410ActiveIndividual· Family Medicine· Tigard, OR
Family Medicine (M.D.) in Tigard, Oregon, trained at University of Missouri, Columbia School of Medicine (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $38,584 for 621 claims, against $18,102 paid for services in 2024. Salix Pharmaceuticals, A Division of Bausch Health US, LLC was the largest of 2 companies reporting payments in 2025, $75.21 in all, mostly food and beverage.
Overview
| NPI | 1023005410 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 30, 2005 |
| Last updated in NPPES | Aug 27, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | MD24492 | 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 - Family Practice (OR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 56 |
|---|---|
| Services billed | 236 across 19 procedure codes |
| Paid by Medicare | $18,102 |
Part D prescriptions in 2024
| Prescriptions (claims) | 621 · 1,048 30-day fills |
|---|---|
| Patients | 53 |
| Total drug cost | $38,584 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | University of Missouri, Columbia School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Family Practice |
| Telehealth | Offers telehealth |
Medical group
- One Medical Group IncSan Jose, CA · 331 clinicians
Hospital affiliations
- Ohsu Hospital and ClinicsPortland, OR
- Providence Portland Medical CenterPortland, OR
- Providence St Vincent Medical CenterPortland, OR
Industry payments (Open Payments)
- 2025$75.21 · 4 payments from 2 companies
- 2024$18.65 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $58.04 | 3 |
| Coopersurgical, Inc. | $17.17 | 1 |
What the 2025 payments were for
- Food and Beverage$75.21 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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