Keith Chunyen Hsu, MD
NPI 1891921458ActiveIndividual· Hospitalist· Mission Viejo, CA
Hospitalist (MD) in Mission Viejo, California, trained at Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University (class of 2008). In 2024 Medicare paid $55,001 for 284 patients, and Part D covered 418 of their prescriptions, 85% of them generic. Abbvie Inc. was the largest of 3 companies reporting payments in 2025, $170.06 in all, mostly food and beverage.
Overview
| NPI | 1891921458 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 9, 2009 |
| Last updated in NPPES | Oct 28, 2020 |
| Certified by provider | Oct 28, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Hospitalist Primary | 208M00000X | A110787C | 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 | 284 |
|---|---|
| Services billed | 1,010 across 12 procedure codes |
| Paid by Medicare | $55,001 |
Part D prescriptions in 2024
| Prescriptions (claims) | 418 · 446 30-day fills |
|---|---|
| Patients | 157 |
| Total drug cost | $32,503 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | Internal Medicine |
Medical group
- Providence Medical FoundationVictorville, CA · 1,466 clinicians
Hospital affiliation
- Providence Mission HospitalMission Viejo, CA
Industry payments (Open Payments)
- 2025$170.06 · 8 payments from 3 companies
- 2024$25.61 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $64.47 | 3 |
| Kestra Medical Technology Services, Inc. | $54.03 | 3 |
| Merck Sharp & Dohme LLC | $51.56 | 2 |
What the 2025 payments were for
- Food and Beverage$170.06 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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