Ramesh Nathan, MD
Infectious Disease · Thousand Oaks, CANPI 1215025291
Payments from drug & device makers
Across 72 payments — averaging $31,239 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Eli Lilly$2.2M
- Tetraphase Pharmaceuticals, Inc.$8K
- Merck$2K
- AbbVie$2K
- Melinta Therapeutics, LLC$115
- Ferring Pharmaceuticals Inc.$101
- plus $663 from 13 others
Across 5 payments — averaging $54,135 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.
- Eli Lilly$271K
What the payments were for
- Consulting fees$1,60013%
- Speaking & faculty fees$7,33760%
- Travel & lodging$1,68914%
- Food & beverage$1,58113%
- Education$280%
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 |
|---|---|---|
| Eli Lilly | 10 | $2,237,002 |
| Tetraphase Pharmaceuticals, Inc. | 9 | $7,979 |
| Merck | 9 | $1,697 |
| AbbVie(2 entities) | 16 | $1,682 |
| Melinta Therapeutics, LLC | 3 | $115 |
| Ferring Pharmaceuticals Inc. | 1 | $101 |
| Viiv Healthcare Company | 4 | $86 |
| Kerecis Limited | 1 | $80 |
| KCI USA, Inc. | 1 | $66 |
| Shionogi Inc | 2 | $64 |
| Insmed, Inc. | 3 | $63 |
| Paratek Pharmaceuticals, Inc. | 3 | $61 |
| Johnson & Johnson(2 entities) | 3 | $57 |
| Gilead | 2 | $52 |
| Biofire Diagnostics, LLC | 1 | $40 |
| Cumberland Pharmaceuticals, Inc. | 1 | $28 |
| Grifols USA, LLC | 1 | $25 |
| Shire North American Group Inc | 1 | $22 |
| Mayne Pharma Commercial LLC | 1 | $19 |
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
$2,249,237 in reported general payments places this provider in the 95th percentile of 856 infectious disease 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 |
|---|---|---|
| JulucaDolutegravir/Rilpivirine | 13 | $45,308 |
| VemlidyTenofovir Alafenamide | 12 | $15,795 |
| EliquisApixaban | 15 | $12,719 |
| ErtapenemErtapenem Sodium | 17 | $8,579 |
| Cefepime Hcl | 16 | $7,360 |
| FarxigaDapagliflozin Propanediol | 11 | $6,552 |
| Fluconazole | 39 | $5,976 |
| DapagliflozinDapagliflozin Propanediol | 12 | $5,972 |
| Voriconazole | 22 | $4,006 |
| Daptomycin | 11 | $3,717 |
| Methenamine Hippurate | 32 | $3,594 |
| Advair DiskusFluticasone Propion/Salmeterol | 13 | $3,387 |
| CeftriaxoneCeftriaxone Sodium | 32 | $2,508 |
| SynthroidLevothyroxine Sodium | 47 | $2,287 |
| JanuviaSitagliptin Phosphate | 11 | $1,909 |
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 |
|---|---|---|
| Viiv Healthcare CompanyJuluca | $86 | $45,30813 claims |
| GileadVemlidy | $52 | $15,79512 claims |
| AbbVieSynthroid | $1,682 | $2,28747 claims |
| MerckJanuvia | $1,697 | $1,90911 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 95th percentile of 856 infectious disease providers in California.
Other infectious disease in Thousand Oaks
- Peter RuaneLos Angeles$24.6M
- Raphael LandovitzLos Angeles$21.4M
- Philip RobinsonNewport Beach$4.9M
- Shawn HasslerSan Francisco$4.3M
- James McKinnellTorrance$4.3M
- Loren MillerTorrance$4.1M
- Jay GladsteinLos Angeles$4M
- Claire PomeroySacramento$3.8M
- Franco FelizartaBakersfield$3.5M
- Abhijit LimayeSan Francisco$2.9M
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.