Zachary Fellows, MD
Rheumatology · Carlsbad, CANPI 1154733152
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $40,500 of the $66,551 with a category attached, or 60.9%. Lilly USA, LLC accounts for 70.3% of it on its own, with 34 other manufacturers making up the rest. 2025 is the largest year on record at $47,355, more than ten times the $1,934 reported in 2020. Among rheumatology clinicians in CA with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 858 payments — averaging $77.57 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Lilly USA, LLC$47K
- Amgen$6K
- AbbVie$2K
- Kyowa Kirin, Inc.$2K
- Boehringer Ingelheim$2K
- Johnson & Johnson$2K
- plus $7K from 29 others
What the payments were for
- Consulting fees$3,0755%
- Speaking & faculty fees$40,50061%
- Travel & lodging$4,8587%
- Food & beverage$17,96827%
- Education$1500%
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 |
|---|---|---|
| Lilly USA, LLC | 76 | $46,803 |
| Amgen(2 entities) | 259 | $5,814 |
| AbbVie | 99 | $2,189 |
| Kyowa Kirin, Inc. | 6 | $1,936 |
| Boehringer Ingelheim | 29 | $1,750 |
| Johnson & Johnson | 72 | $1,542 |
| UCB, Inc. | 58 | $1,053 |
| AstraZeneca(2 entities) | 39 | $788 |
| GSK | 30 | $588 |
| ANI Pharmaceuticals, Inc. | 34 | $544 |
| Novartis | 28 | $514 |
| Pfizer | 23 | $454 |
| Aurinia Pharma U.S., Inc. | 21 | $431 |
| Mallinckrodt Hospital Products Inc. | 14 | $350 |
| Sobi, Inc | 9 | $216 |
| Fresenius Kabi USA, LLC | 8 | $187 |
| E.r. Squibb & Sons, L.L.C. | 11 | $184 |
| Restor3d, Inc. | 1 | $182 |
| Genentech USA, Inc. | 7 | $167 |
| Sanofi | 3 | $165 |
| Merck | 8 | $152 |
| Octapharma USA, Inc. | 4 | $110 |
| Organon | 4 | $88 |
| Pacira Therapeutics, Inc. | 2 | $61 |
| Bioventus LLC | 2 | $44 |
| Ultragenyx Pharmaceutical Inc. | 2 | $43 |
| Sandoz | 1 | $31 |
| Pacira Pharmaceuticals Incorporated | 1 | $26 |
| Kiniksa Pharmaceuticals International, PLC | 1 | $25 |
| Radius Health, Inc. | 1 | $22 |
| Gilead | 1 | $20 |
| Celltrion USA Inc. | 1 | $18 |
| Neurometrix Inc | 1 | $18 |
| Biogen | 1 | $18 |
| Rhythm Pharmaceuticals, Inc. | 1 | $17 |
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
$66,551 in reported general payments places this provider in the 90th percentile of 808 rheumatology 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 |
|---|---|---|
| Enbrel SureclickEtanercept | 11 | $92,472 |
| Hydroxychloroquine Sulfate | 90 | $5,815 |
| MethotrexateMethotrexate Sodium | 49 | $2,696 |
| Celecoxib | 21 | $1,100 |
| Gabapentin | 38 | $1,034 |
| Sulfasalazine DrSulfasalazine | 13 | $938 |
| Pregabalin | 20 | $898 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 19 | $872 |
| Duloxetine Hcl | 36 | $864 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 16 | $775 |
| Prednisone | 78 | $773 |
| Folic Acid | 22 | $314 |
| Allopurinol | 24 | $277 |
| Meloxicam | 26 | $178 |
| Alendronate Sodium | 22 | $92 |
Paid to pharmacies, not to this prescriber.
Other rheumatology in Carlsbad
- Sudhakar TumuluriSan Francisco$2.8M
- Ara DikranianSan Diego$2.2M
- Orrin TroumSanta Monica$1.8M
- Robin DoreTustin$1.5M
- Samy MetyasCovina$1.3M
- Rhonda LambertSan Mateo$1.1M
- William ShielMission Viejo$924K
- Mark BoriginiDowney$920K
- Adam KreitenbergTarzana$863K
- Roger KornuTustin$802K
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.