Loren Yui Chen, M.D.
NPI 1972581643ActiveIndividual· Internal Medicine· Panorama City, CA
Internal Medicine (M.D.) in Panorama City, California, trained at University of California, Davis School of Medicine (class of 1994). Their prescriptions cost Medicare Part D more than their services did: $61,904 for 1,198 claims, against $20,604 paid for services in 2024. Amgen Inc. was the largest of 2 companies reporting payments in 2025, $44.46 in all, mostly food and beverage.
Overview
| NPI | 1972581643 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jan 4, 2006 |
| Last updated in NPPES | Nov 8, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A60889 | CA |
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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 78 |
|---|---|
| Services billed | 319 across 3 procedure codes |
| Paid by Medicare | $20,604 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,198 · 2,036 30-day fills |
|---|---|
| Patients | 181 |
| Total drug cost | $61,904 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | University of California, Davis School of Medicine |
|---|---|
| Graduation year | 1994 |
| Medicare specialty | Internal Medicine |
Hospital affiliation
- Valley Presbyterian HospitalVan Nuys, CA
Other facilities
- Angel of Joy HospiceHospice · Montclair, CA
Industry payments (Open Payments)
- 2025$44.46 · 2 payments from 2 companies
- 2024$42.56 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $25.27 | 1 |
| Pfizer Inc. | $19.19 | 1 |
What the 2025 payments were for
- Food and Beverage$44.46 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 122 internal medicine physicians in Panorama City · All internal medicine physicians in California