Harrison Chen, DO
NPI 1841829793ActiveIndividual· Internal Medicine· Arcadia, CA
Internal Medicine (DO) with Arcadia Hospitalist Medical Group Inc and 2 other groups, practicing in Arcadia, California. 445 Medicare patients in 2024, $148,933 paid; nearly all of their 322 Part D prescriptions were generic (90%). Salix Pharmaceuticals, A Division of Bausch Health US, LLC reported $16.96 in payments in 2025, mostly food and beverage. Lists Providence Little Co of Mary Med Ctr San Pedro and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1841829793 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Apr 3, 2020 |
| Last updated in NPPES | Jul 21, 2023 |
| Certified by provider | Jul 21, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 20A19990 | 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 | 445 |
|---|---|
| Services billed | 1,631 across 7 procedure codes |
| Paid by Medicare | $148,933 |
Part D prescriptions in 2024
| Prescriptions (claims) | 322 · 325 30-day fills |
|---|---|
| Patients | 129 |
| Total drug cost | $17,440 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 2020 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical groups
- Arcadia Hospitalist Medical Group IncArcadia, CA · 30 clinicians
- Little Company Hospitalist Medical Group IncTorrance, CA · 28 clinicians
- San Pedro Hospitalist Medical Group IncSan Pedro, CA · 17 clinicians
Hospital affiliations
- Providence Little Co of Mary Med Ctr San PedroSan Pedro, CA
- Providence Little Company of Mary Med Ctr TorranceTorrance, CA
- Usc Arcadia HospitalArcadia, CA
Industry payments (Open Payments)
- 2025$16.96 · 1 payment from 1 company
- 2024$156.59 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $16.96 | 1 |
What the 2025 payments were for
- Food and Beverage$16.96 · 1 payment
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