Gregory J. Withers, M.D.
NPI 1700804382ActiveIndividual· Neurological Surgery· Arcadia, CA
Neurological Surgery (M.D.) in Arcadia, California, trained at University of California, Geffen School of Medicine (class of 1973). 155 Medicare patients in 2024, $58,206 paid; all of their 317 Part D prescriptions were generic. Medtronic, Inc. reported $164.45 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1700804382 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jul 18, 2006 |
| Last updated in NPPES | Apr 16, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Neurological Surgery Primary | 207T00000X | G27800 | 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 - Neurosurgery (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 155 |
|---|---|
| Services billed | 339 across 43 procedure codes |
| Paid by Medicare | $58,206 |
Part D prescriptions in 2024
| Prescriptions (claims) | 317 · 503 30-day fills |
|---|---|
| Patients | 65 |
| Total drug cost | $3,997 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 1973 |
| Medicare specialty | Neurosurgery |
Medical group
- Usc Care Medical Group IncLos Angeles, CA · 1,380 clinicians
Hospital affiliation
- Usc Arcadia HospitalArcadia, CA
Industry payments (Open Payments)
- 2025$164.45 · 1 payment from 1 company
- 2024$25.49 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Medtronic, Inc. | $164.45 | 1 |
What the 2025 payments were for
- Food and Beverage$164.45 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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