William C. McMaster, M.D.
NPI 1336175058ActiveIndividual· Orthopaedic Surgery· Orange, CA
Orthopaedic Surgery (M.D.) in Orange, California, trained at Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University (class of 1966). Medicare paid $15,849 for services to 59 patients in 2024. Globus Medical, Inc. was the largest of 2 companies reporting payments in 2025, $86.83 in all, mostly food and beverage.
Overview
| NPI | 1336175058 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 24, 2006 |
| Last updated in NPPES | Mar 3, 2025 |
| Certified by provider | Mar 3, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery Primary | 207X00000X | G20323 | CA |
| Specialist | 174400000X | — | — |
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 | 59 |
|---|---|
| Services billed | 86 across 13 procedure codes |
| Paid by Medicare | $15,849 |
Education and affiliations
| Medical school | Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University |
|---|---|
| Graduation year | 1966 |
| Medicare specialty | Orthopedic Surgery |
Medical group
- Regents of the University of CaliforniaOrange, CA · 51 clinicians
Hospital affiliation
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$86.83 · 2 payments from 2 companies
- 2024$175.02 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Globus Medical, Inc. | $57.45 | 1 |
| Advanced Oxygen Therapy Inc. | $29.38 | 1 |
What the 2025 payments were for
- Food and Beverage$86.83 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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