Pai-Hsiang Chen, D.O
NPI 1063405892ActiveIndividual· Internal Medicine· Arcadia, CA
Internal Medicine (D.O) in Arcadia, California, trained at At Still University of Health Sciences, College of Osteo Med, Kirksville (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $522,039 for 7,668 claims, against $19,968 paid for services in 2024. Pfizer Inc. was the largest of 13 companies reporting payments in 2025, $1,749 in all, mostly food and beverage.
Overview
| NPI | 1063405892 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O |
| Sole proprietor | Yes |
| NPI issued | Aug 26, 2005 |
| Last updated in NPPES | Sep 28, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 20A7219 | 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 | 63 |
|---|---|
| Services billed | 223 across 12 procedure codes |
| Paid by Medicare | $19,968 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,668 · 16,803 30-day fills |
|---|---|
| Patients | 640 |
| Total drug cost | $522,039 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | At Still University of Health Sciences, College of Osteo Med, Kirksville |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Internal Medicine |
Industry payments (Open Payments)
- 2025$1,749 · 22 payments from 13 companies
- 2024$2,348 · 30 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $164.60 | 7 |
| Exact Sciences Corporation | $157.31 | 2 |
| Amgen Inc. | $143.59 | 2 |
| Phathom Pharmaceuticals, Inc. | $140.00 | 1 |
| Bayer Healthcare Pharmaceuticals Inc. | $140.00 | 1 |
What the 2025 payments were for
- Food and Beverage$1,749 · 22 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 100 internal medicine physicians in Arcadia · All internal medicine physicians in California