Madhavi Siddhanthi, MD
Rheumatology · Marietta, GANPI 1659543130
Payments from drug & device makers
Across 256 payments — averaging $19.89 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Amgen$1K
- Johnson & Johnson$669
- AbbVie$497
- Mallinckrodt Hospital Products Inc.$342
- Novartis$341
- E.r. Squibb & Sons, L.L.C.$271
- plus $2K from 21 others
What the payments were for
- Food & beverage$4,93497%
- Education$1593%
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) | 68 | $1,225 |
| Johnson & Johnson | 32 | $669 |
| AbbVie | 26 | $497 |
| Mallinckrodt Hospital Products Inc. | 14 | $342 |
| Novartis | 17 | $341 |
| E.r. Squibb & Sons, L.L.C. | 15 | $271 |
| AstraZeneca | 12 | $257 |
| Pfizer | 15 | $251 |
| Aurinia Pharma U.S., Inc. | 9 | $231 |
| UCB, Inc. | 9 | $213 |
| Lilly USA, LLC | 5 | $102 |
| Boehringer Ingelheim | 5 | $100 |
| GSK | 5 | $85 |
| Actelion Pharmaceuticals US, Inc. | 3 | $71 |
| Sobi, Inc | 3 | $70 |
| Sanofi | 2 | $60 |
| Radius Health, Inc. | 2 | $56 |
| Organon | 2 | $46 |
| Octapharma USA, Inc. | 2 | $37 |
| Invivyd Inc | 1 | $27 |
| Antares Pharma, Inc. | 2 | $25 |
| Medexus Pharma, Inc. | 2 | $24 |
| Kyowa Kirin, Inc. | 1 | $24 |
| Ferring Pharmaceuticals Inc. | 1 | $22 |
| Genentech USA, Inc. | 1 | $16 |
| Kiniksa Pharmaceuticals International, PLC | 1 | $16 |
| Sandoz | 1 | $15 |
How this compares
$5,093 in reported general payments places this provider in the 45th percentile of 177 rheumatology providers in Georgia.
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 | 29 | $241,273 |
| Enbrel SureclickEtanercept | 11 | $91,345 |
| Xeljanz XrTofacitinib Citrate | 12 | $89,317 |
| Hydroxychloroquine Sulfate | 226 | $8,433 |
| MethotrexateMethotrexate Sodium | 179 | $3,506 |
| Leflunomide | 58 | $2,522 |
| Pilocarpine Hcl | 22 | $2,132 |
| Febuxostat | 14 | $2,042 |
| Methylprednisolone | 98 | $1,530 |
| Mycophenolate Mofetil | 23 | $1,488 |
| Pregabalin | 37 | $1,434 |
| Gabapentin | 143 | $1,426 |
| Diclofenac Sodium | 45 | $1,048 |
| Prednisone | 189 | $1,015 |
| Duloxetine Hcl | 40 | $877 |
Paid to pharmacies, not to this prescriber.
Other rheumatology in Marietta
- Roel QuerubinMarietta$1.5M
- Mohammed AbubakerMarietta$331K
- Javeria BhawalMarietta$41K
- Mohammad KamranMarietta$40K
- Ritesh KohliMarietta$18K
- Xena WhittierMarietta$13K
- Theresa Lawrence FordLawrenceville$2.9M
- Wambui MachuaAtlanta$1.8M
- Brent FlickingerGainesville$1.6M
- James MossellTifton$1.6M
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.