Mark S. Hsiao, M.D.
NPI 1114008984ActiveIndividual· Orthopaedic Surgery, Orthopaedic Surgery of the Spine· Alhambra, CA
Orthopaedic Surgery, Orthopaedic Surgery of the Spine (M.D.) in Alhambra, California, trained at Creighton University School of Medicine (class of 2011). Their prescriptions cost Medicare Part D more than their services did: $17,522 for 1,127 claims, against $9,200 paid for services in 2024. Stryker Corporation reported $57.30 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1114008984 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 18, 2006 |
| Last updated in NPPES | May 7, 2024 |
| Certified by provider | Feb 10, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery, Orthopaedic Surgery of the Spine Primary | 207XS0117X | MD61024463 | WA |
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 - Orthopedic Surgery (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 95 |
|---|---|
| Services billed | 409 across 37 procedure codes |
| Paid by Medicare | $9,200 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,127 · 1,457 30-day fills |
|---|---|
| Patients | 406 |
| Total drug cost | $17,522 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | Creighton University School of Medicine |
|---|---|
| Graduation year | 2011 |
| Medicare specialty | Orthopedic Surgery |
Medical group
- Southern California Permanente Medical GroupRedlands, CA · 11,293 clinicians
Industry payments (Open Payments)
- 2025$57.30 · 2 payments from 1 company
- 2024$749.43 · 12 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Stryker Corporation | $57.30 | 2 |
What the 2025 payments were for
- Food and Beverage$57.30 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Orthopaedic Surgery, Orthopaedic Surgery of the Spine providers in Alhambra
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