Greg S. Keller, M.D.
NPI 1639284813ActiveIndividual· Orthopaedic Surgery· Prescott, AZ
Orthopaedic Surgery (M.D.) in Prescott, Arizona, trained at Pennsylvania State University College of Medicine (class of 1994). Mostly services rather than prescriptions: Medicare paid $23,377 for 92 patients in 2024, with only 18 Part D claims. Stryker Corporation reported $140.15 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1639284813 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 20, 2006 |
| Last updated in NPPES | Dec 1, 2021 |
| Certified by provider | Nov 19, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery Primary | 207X00000X | 31711 | AZ |
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 (AZ); Practitioner - Orthopedic Surgery (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 92 |
|---|---|
| Services billed | 190 across 16 procedure codes |
| Paid by Medicare | $23,377 |
Part D prescriptions in 2024
| Prescriptions (claims) | 18 · 18 30-day fills |
|---|---|
| Total drug cost | $129.60 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | Pennsylvania State University College of Medicine |
|---|---|
| Graduation year | 1994 |
| Medicare specialty | Orthopedic Surgery |
Medical group
- Lewis County General HospitalLyons Falls, NY · 40 clinicians
Hospital affiliation
- Lewis County General HospitalLowville, NY
Industry payments (Open Payments)
- 2025$140.15 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Stryker Corporation | $140.15 | 2 |
What the 2025 payments were for
- Food and Beverage$140.15 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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