Brian Randall Gantwerker, M.D.
NPI 1609842715ActiveIndividual· Neurological Surgery· Santa Monica, CA
Opted out of Medicare from January 2023 to January 2027. Neurological Surgery (M.D.) in Santa Monica, California, licensed in CA, with an NPI issued in February 2006. Part D covered 85 prescriptions written in 2024, 100% of them generic. Remex Medical USA Inc was the largest of 3 companies reporting payments in 2025, $1,554 in all, mostly consulting fees.
Overview
| NPI | 1609842715 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 28, 2006 |
| Last updated in NPPES | Jun 14, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Neurological Surgery Primary | 207T00000X | A109316 | CA |
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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Opt-out | Opted out Jan 2, 2023 – Jan 2, 2027 |
| Can order and refer | Yes |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
Part D prescriptions in 2024
| Prescriptions (claims) | 85 · 92 30-day fills |
|---|---|
| Patients | 34 |
| Total drug cost | $777.35 |
| Generic share | 100% of claims |
Industry payments (Open Payments)
- 2025$1,554 · 3 payments from 3 companies
- 2024$1,784 · 12 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Remex Medical USA Inc | $1,500 | 1 |
| Ge Healthcare | $29.56 | 1 |
| Koh Young America, Inc. | $24.18 | 1 |
What the 2025 payments were for
- Consulting Fee$1,500 · 1 payment
- Food and Beverage$53.74 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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