Gregory Trent Walker Jr., MD
NPI 1801250659ActiveIndividual· Orthopaedic Surgery, Foot and Ankle Surgery· Tucson, AZ
Orthopaedic Surgery, Foot and Ankle Surgery (MD) with Tucson Physician Group Holdings LLC, practicing in Tucson, Arizona. 241 Medicare patients in 2024, $93,133 paid; all of their 352 Part D prescriptions were generic. Orthofix Medical, Inc. was the largest of 8 companies reporting payments in 2025, $442.39 in all, mostly food and beverage. Lists St Joseph's Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1801250659 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 7, 2016 |
| Last updated in NPPES | Nov 28, 2022 |
| Certified by provider | Nov 28, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery, Foot and Ankle Surgery Primary | 207XX0004X | 85758 | AZ |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 - Orthopedic Surgery (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 241 |
|---|---|
| Services billed | 855 across 112 procedure codes |
| Paid by Medicare | $93,133 |
Part D prescriptions in 2024
| Prescriptions (claims) | 352 · 354 30-day fills |
|---|---|
| Patients | 108 |
| Total drug cost | $3,171 |
| Generic share | 100% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Orthopedic Surgery |
Medical group
- Tucson Physician Group Holdings LLCTucson, AZ · 201 clinicians
Hospital affiliations
- St Joseph's HospitalTucson, AZ
- St. Mary's HospitalTucson, AZ
Industry payments (Open Payments)
- 2025$442.39 · 18 payments from 8 companies
- 2024$465.54 · 33 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Orthofix Medical, Inc. | $99.92 | 9 |
| Paragon 28, Inc. | $80.42 | 1 |
| Alafair Biosciences, Inc. | $76.49 | 2 |
| Curonix LLC | $58.33 | 1 |
| Integra Lifesciences Corporation | $47.65 | 1 |
What the 2025 payments were for
- Food and Beverage$442.39 · 18 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Orthopaedic Surgery, Foot and Ankle Surgery providers in Arizona