David Riker, MD
Internal Medicine · San Diego, CANPI 1164405528
Payments from drug & device makers
Across 53 payments — averaging $1644.06 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- GSK$40K
- Cook Incorporated$28K
- Novartis$16K
- Cook Medical LLC$2K
- Intuitive Surgical$1K
- Breathe Technologies, Inc.$140
- plus $151 from 2 others
Across 1 payment — averaging $3048.30 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- GSK$3K
What the payments were for
- Speaking & faculty fees$28,44390%
- Travel & lodging$1,8886%
- Food & beverage$1,2404%
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 |
|---|---|---|
| GSK | 8 | $40,028 |
| Cook Incorporated | 9 | $28,492 |
| Novartis | 3 | $15,537 |
| Cook Medical LLC | 18 | $1,706 |
| Intuitive Surgical | 4 | $1,082 |
| Breathe Technologies, Inc. | 6 | $140 |
| Pulmonx Corporation | 4 | $116 |
| Boston Scientific | 1 | $34 |
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.
- Blue Rhino$21,490
- Cook Medical Percutaneous Tracheostomy$4,356
- Cook Medical Ciaglia Blue Rhino$3,500
- Da Vinci Surgical System$1,076
- Wayne$113
How this compares
$87,135 in reported general payments places this provider in the 95th percentile of 13,581 internal medicine 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 |
|---|---|---|
| EliquisApixaban | 20 | $7,181 |
| Ipratropium-AlbuterolIpratropium/Albuterol Sulfate | 108 | $1,638 |
| Levetiracetam | 11 | $1,196 |
| Scopolamine | 11 | $958 |
| Tolterodine Tartrate ErTolterodine Tartrate | 12 | $625 |
| Potassium Chloride | 13 | $577 |
| Modafinil | 12 | $491 |
| Gabapentin | 19 | $348 |
| Pregabalin | 19 | $300 |
| Venlafaxine Hcl ErVenlafaxine Hcl | 13 | $243 |
| Hydroxyzine Hcl | 13 | $199 |
| Metformin Hcl | 14 | $183 |
| Albuterol Sulfate | 18 | $173 |
| Trazodone Hcl | 12 | $155 |
| Atorvastatin Calcium | 13 | $153 |
Paid to pharmacies, not to this prescriber.
Other internal medicine in San Diego
- Donald BrandonSan Diego$34M
- Elaine WatkinsSan Diego$11.3M
- James ChenSan Diego$2.9M
- Rita StarrittSan Diego$2.6M
- Hatim HusainSan Diego$2.6M
- Gary FiresteinSan Diego$2.6M
- Andrew ChengSouth San Francisco$55.1M
- Joel NeutelTustin$34.9M
- William TownerLos Angeles$27.4M
- Rahul AggarwalSan Francisco$24M
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.