Marc A. Trzeciak, D. O.
NPI 1033111026ActiveIndividual· Orthopaedic Surgery· Modesto, CA
Orthopaedic Surgery (D. O.) with Stanislaus Orthopaedic and Sports Medicine Clinic, practicing in Modesto, California. 252 Medicare patients in 2024, $59,591 paid; nearly all of their 297 Part D prescriptions were generic (99%). Endo USA, Inc. reported $289.38 in payments in 2025, mostly food and beverage. Lists Doctors Medical Center as a hospital affiliation.
Overview
| NPI | 1033111026 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D. O. |
| Sole proprietor | No |
| NPI issued | Aug 10, 2005 |
| Last updated in NPPES | Mar 19, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery Primary | 207X00000X | 20A12596 | CA |
| Orthopaedic Surgery, Hand Surgery | 207XS0106X | 5505 | OH |
| Orthopaedic Surgery, Hand Surgery | 207XS0106X | 20A12596 | CA |
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 | 252 |
|---|---|
| Services billed | 1,057 across 42 procedure codes |
| Paid by Medicare | $59,591 |
Part D prescriptions in 2024
| Prescriptions (claims) | 297 · 297 30-day fills |
|---|---|
| Patients | 200 |
| Total drug cost | $28,125 |
| Generic share | 99% of claims |
Education and affiliations
| Graduation year | 1990 |
|---|---|
| Medicare specialty | Orthopedic Surgery |
| Secondary specialties | Hand Surgery |
Medical group
- Stanislaus Orthopaedic and Sports Medicine ClinicModesto, CA · 9 clinicians
Hospital affiliation
- Doctors Medical CenterModesto, CA
Industry payments (Open Payments)
- 2025$289.38 · 10 payments from 1 company
- 2024$52.19 · 3 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Endo USA, Inc. | $289.38 | 10 |
What the 2025 payments were for
- Food and Beverage$289.38 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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