Clifford Douglas, MD
Neurological Surgery · Riverside, CANPI 1932166485
Payments from drug & device makers
Across 178 payments — averaging $115.71 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Stryker$8K
- Si-bone, Inc.$5K
- Medtronic$4K
- Cerapedics Inc.$2K
- Integra Lifesciences Corporation$408
- Spinal Simplicity, LLC$336
- plus $927 from 12 others
What the payments were for
- Travel & lodging$10,28350%
- Food & beverage$10,31250%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| Stryker | 55 | $8,424 |
| Si-bone, Inc. | 43 | $4,817 |
| Medtronic(2 entities) | 39 | $4,097 |
| Cerapedics Inc. | 9 | $1,587 |
| Integra Lifesciences Corporation | 10 | $408 |
| Spinal Simplicity, LLC | 4 | $336 |
| VB Spine LLC | 2 | $174 |
| EBI, LLC | 1 | $138 |
| Johnson & Johnson | 3 | $127 |
| Livanova USA, Inc. | 1 | $87 |
| Cumberland Pharmaceuticals, Inc. | 1 | $85 |
| Boston Scientific | 3 | $82 |
| Abbott | 2 | $78 |
| Lemaitre Vascular, Inc. | 1 | $64 |
| Bioventus LLC | 1 | $38 |
| Zimmer Biomet | 1 | $25 |
| BK Medical Holding Company Inc. | 1 | $19 |
| Paradigm Spine, LLC | 1 | $11 |
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.
- EVEREST SPINAL SYSTEM$4,722
- iFuse Implant$2,276
- N/A$2,220
- ACTIVA$1,729
- I-FACTOR PEPTIDE ENHANCED BONE GRAFT$1,424
- PERCEPT PC BRAINSENSE$937
- HA MINUTEMAN G3-R$287
- MAZOR X SYSTEM$168
- SPINEMAP$167
- ACTIVA PC$164
- SPINEJACK$161
- Biomet SpinalPak Non-invasive Spine Fusion Stimulator System$138
- MESA SPINAL SYSTEM$131
- DENALI$127
- EVEREST$127
- O-ARM-ST$126
- MOJAVE$122
- TRITANIUM$120
- SCOPIS ENT$105
- CODMAN CERTAS$100
How this compares
$20,596 in reported general payments places this provider in the 70th 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 |
|---|---|---|
| Ketorolac Tromethamine | 27 | $370 |
| Methylprednisolone | 45 | $279 |
| Clindamycin Hcl | 41 | $209 |
| Tizanidine Hcl | 44 | $187 |
Paid to pharmacies, not to this prescriber.
Other neurological surgery in Riverside
- Geoffrey ManleySan Francisco$24.9M
- Christopher AmesSan Francisco$7.1M
- Jamshid SalehRedding$4.1M
- Bruce McCormackSan Francisco$3.9M
- Andrew SchreiberSanta Ana$3.9M
- Larry KhooLos Angeles$3M
- Jennie TaylorSan Francisco$2.7M
- Joseph CiacciSan Diego$2.6M
- Nicholas ButowskiSan Francisco$2.4M
- Samy AbdouSan Diego$2.4M
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.