Marcum Collins, MD
Rheumatology · Knoxville, TNNPI 1154732436
Payments from drug & device makers
Across 677 payments — averaging $17.46 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Amgen$3K
- AbbVie$2K
- Pfizer$2K
- Novartis$988
- AstraZeneca$923
- Johnson & Johnson$580
- plus $3K from 22 others
What the payments were for
- Food & beverage$11,73099%
- Education$901%
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 |
|---|---|---|
| Amgen(2 entities) | 159 | $2,505 |
| AbbVie | 165 | $2,291 |
| Pfizer | 98 | $1,616 |
| Novartis | 68 | $988 |
| AstraZeneca(2 entities) | 43 | $923 |
| Johnson & Johnson(2 entities) | 25 | $580 |
| Lilly USA, LLC | 23 | $571 |
| GSK | 13 | $314 |
| UCB, Inc. | 11 | $309 |
| Regeneron Healthcare Solutions, Inc. | 4 | $289 |
| Boehringer Ingelheim | 10 | $280 |
| Mallinckrodt Hospital Products Inc. | 9 | $203 |
| Sobi, Inc | 7 | $150 |
| Organon | 7 | $136 |
| Aurinia Pharma U.S., Inc. | 7 | $118 |
| Sandoz | 3 | $86 |
| Fresenius Kabi USA, LLC | 4 | $79 |
| E.r. Squibb & Sons, L.L.C. | 5 | $75 |
| Kiniksa Pharmaceuticals International, PLC | 3 | $67 |
| Sanofi | 3 | $58 |
| Radius Health, Inc. | 2 | $38 |
| Genentech USA, Inc. | 1 | $31 |
| Kiniksa Pharmaceuticals, Ltd. | 1 | $28 |
| Kyowa Kirin, Inc. | 1 | $22 |
| Teva Pharmaceuticals USA, Inc. | 1 | $20 |
| Hospira, Inc. | 2 | $15 |
| Scilex Pharmaceuticals Inc. | 1 | $15 |
| Gilead | 1 | $13 |
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.
How this compares
$11,820 in reported general payments places this provider in the 60th percentile of 127 rheumatology providers in Tennessee.
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 |
|---|---|---|
| Humira(Cf) PenAdalimumab | 327 | $2,689,147 |
| Enbrel SureclickEtanercept | 244 | $1,823,698 |
| Orencia ClickjectAbatacept | 109 | $601,102 |
| Cosentyx Sensoready PenSecukinumab | 37 | $491,176 |
| RinvoqUpadacitinib | 71 | $440,042 |
| OtezlaApremilast | 63 | $286,421 |
| Humira PenAdalimumab | 37 | $248,582 |
| Actemra ActpenTocilizumab | 73 | $239,802 |
| Enbrel MiniEtanercept | 32 | $227,057 |
| Taltz AutoinjectorIxekizumab | 24 | $226,597 |
| Cimzia (2 Pack)Certolizumab Pegol | 34 | $189,778 |
| Cyltezo(Cf) PenAdalimumab-Adbm | 26 | $171,863 |
| SimponiGolimumab | 28 | $168,281 |
| KevzaraSarilumab | 23 | $96,729 |
| Humira(Cf)Adalimumab | 13 | $79,591 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| AbbVieRinvoq, Humira(Cf) | $2,291 | $519,63284 claims |
| AmgenOtezla | $2,505 | $286,42163 claims |
| UCB, Inc.Cimzia (2 Pack) | $309 | $189,77834 claims |
| Johnson & JohnsonSimponi | $580 | $168,28128 claims |
| SanofiKevzara | $58 | $96,72923 claims |
| PfizerXeljanz | $1,616 | $73,24012 claims |
| GSKBenlysta | $314 | $58,41012 claims |
| Scilex Pharmaceuticals Inc.Colchicine | $15 | $1,99341 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 60th percentile of 127 rheumatology providers in Tennessee.
Other rheumatology in Knoxville
- Brett SmithKnoxville$587K
- Marcin GornisiewiczKnoxville$310K
- Robert CappsKnoxville$88K
- Jay WarrrickKnoxville$41K
- Kenny SizemoreKnoxville$27K
- Kenneth JohnsenKnoxville$17K
- Christy ParkKnoxville$16K
- William BushKnoxville$12K
- Tonya BakerKnoxville$10K
- James BurnsKnoxville$9K
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.