David Knowlton, MD
Family Medicine · Springfield, ORNPI 1902975741
Payments from drug & device makers
Across 14 payments — averaging $19.01 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$149
- Amgen$32
- Hologic Sales And Service, LLC$20
- Organon$19
- AstraZeneca$18
- Sumitomo Pharma America, Inc.$14
- plus $14 from 1 others
What the payments were for
- Food & beverage$266100%
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 |
|---|---|---|
| AbbVie | 8 | $149 |
| Amgen | 1 | $32 |
| Hologic Sales And Service, LLC | 1 | $20 |
| Organon | 1 | $19 |
| AstraZeneca | 1 | $18 |
| Sumitomo Pharma America, Inc. | 1 | $14 |
| Lilly USA, LLC | 1 | $14 |
How this compares
$266 in reported general payments places this provider in the 70th percentile of 1,221 family medicine providers in Oregon.
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 | 57 | $61,709 |
| OzempicSemaglutide | 47 | $47,702 |
| JardianceEmpagliflozin | 32 | $47,351 |
| XareltoRivaroxaban | 22 | $27,747 |
| JanuviaSitagliptin Phosphate | 21 | $22,188 |
| Spiriva HandihalerTiotropium Bromide | 20 | $15,110 |
| Advair HfaFluticasone Propion/Salmeterol | 14 | $8,522 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 257 | $7,041 |
| Lantus SolostarInsulin Glargine,hum.Rec.Anlog | 35 | $4,984 |
| Albuterol Sulfate HfaAlbuterol Sulfate | 128 | $4,432 |
| Gabapentin | 215 | $4,143 |
| Atorvastatin Calcium | 246 | $3,957 |
| Buprenorphine-NaloxoneBuprenorphine Hcl/Naloxone Hcl | 50 | $3,751 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 52 | $3,663 |
| Tamsulosin Hcl | 143 | $3,542 |
Paid to pharmacies, not to this prescriber.
Other family medicine in Springfield
- Stephan AmesSpringfield$6K
- John DelgadoAshland$4.3M
- John MickelsonLincoln City$2.1M
- Subramaniam SeetharamanMilwaukie$1.8M
- Eden MillerBend$1.7M
- Maureen MaysPortland$491K
- Thomas TurkRoseburg$434K
- Anil RajaniHood River$325K
- Patricia BuchananEugene$239K
- Keith KlattAstoria$166K
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.