Derek Southwell, MD
Neurological Surgery · San Francisco, CANPI 1316236912
Payments from drug & device makers
What this record shows
The money is spread across several categories — consulting fees (49.2%), food and beverage and travel and lodging — rather than concentrated in one kind of arrangement. 9 manufacturers reported payments, led by Neuropace, Inc. at 38.3% of the total.
Across 56 payments — averaging $196.14 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Neuropace, Inc.$4K
- Neuroone Medical Technologies Corporation$2K
- Medtronic$1K
- Monteris Medical Corporation$1K
- Astellas Pharma Inc$616
- Vertex$492
- plus $696 from 3 others
What the payments were for
- Consulting fees$5,40849%
- Speaking & faculty fees$4144%
- Travel & lodging$1,98318%
- Food & beverage$3,17929%
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| Neuropace, Inc. | 16 | $4,205 |
| Neuroone Medical Technologies Corporation | 4 | $2,312 |
| Medtronic | 15 | $1,488 |
| Monteris Medical Corporation | 15 | $1,175 |
| Astellas Pharma Inc | 1 | $616 |
| Vertex | 1 | $492 |
| Livanova USA, Inc. | 1 | $414 |
| UCB, Inc. | 2 | $163 |
| Boston Scientific | 1 | $119 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
- RNS Neurostimulator Kit$3,802
- ACTIVA$903
- Neuroblate$659
- VNS THERAPY SENTIVA MODEL 1000 GENERATOR$414
- OneRF Ablation System$304
How this compares
$10,984 in reported general payments places this provider in the 65th percentile of 773 neurological surgery providers in California.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Oxycodone Hcl | 14 | $63 |
Paid to pharmacies, not to this prescriber.
Other neurological surgery in San Francisco
- Christopher AmesSan Francisco$7.1M
- Praveen MummaneniSan Francisco$1.1M
- Lee TanSan Francisco$682K
- Jang YoonSan Francisco$227K
- Larry KhooLos Angeles$2.8M
- Samy AbdouSan Diego$2.4M
- Bret AbshireMurrieta$2.3M
- William TaylorSan Diego$2.1M
- Tooraj GravoriEncino$2M
- Ali MesiwalaRancho Cucamonga$1.5M
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.