Robert Grossberg, MD
Infectious Disease · Bronx, NYNPI 1538259338
Payments from drug & device makers
Across 412 payments — averaging $2510.30 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Viiv Healthcare Company$359K
- Gilead$319K
- GSK$125K
- Merck$99K
- AbbVie$59K
- Amgen$38K
- plus $35K from 2 others
Across 37 payments — averaging $144.22 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.
- GSK$2K
- Gilead$1K
- AbbVie$1K
- Viiv Healthcare Company$1K
What the payments were for
- Speaking & faculty fees$1,50052%
- Travel & lodging$77627%
- Food & beverage$63022%
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 |
|---|---|---|
| Viiv Healthcare Company | 144 | $359,125 |
| Gilead | 147 | $318,868 |
| GSK | 42 | $125,100 |
| Merck | 33 | $99,223 |
| AbbVie | 23 | $59,128 |
| Amgen | 5 | $38,173 |
| Janssen Research & Development, LLC | 17 | $33,125 |
| Theratechnologies Inc. | 1 | $1,500 |
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.
- MK-8591A$685
How this compares
$1,034,242 in reported general payments places this provider in the 95th percentile of 799 infectious disease providers in New York.
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 |
|---|---|---|
| BiktarvyBictegrav/Emtricit/Tenofov Ala | 289 | $1,107,157 |
| SymtuzaDarunavir/Cob/Emtri/Tenof Alaf | 136 | $640,680 |
| TivicayDolutegravir Sodium | 97 | $222,359 |
| GenvoyaElviteg/Cob/Emtri/Tenof Alafen | 44 | $173,743 |
| DescovyEmtricitabine/Tenofov Alafenam | 63 | $131,016 |
| OdefseyEmtricitab/Rilpiviri/Tenof Ala | 35 | $121,346 |
| PrezcobixDarunavir/Cobicistat | 50 | $116,774 |
| RukobiaFostemsavir Tromethamine | 12 | $101,349 |
| DovatoDolutegravir Sodium/Lamivudine | 29 | $79,894 |
| TriumeqAbacavir/Dolutegravir/Lamivudi | 21 | $76,282 |
| EliquisApixaban | 57 | $36,914 |
| OzempicSemaglutide | 30 | $26,645 |
| JardianceEmpagliflozin | 36 | $24,649 |
| EvotazAtazanavir Sulfate/Cobicistat | 16 | $24,065 |
| PifeltroDoravirine | 12 | $19,805 |
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 |
|---|---|---|
| GileadBiktarvy, Genvoya, Descovy | $318,868 | $1,411,916396 claims |
| Viiv Healthcare CompanyTivicay, Rukobia, Dovato, Triumeq | $359,125 | $479,885159 claims |
| MerckPifeltro | $99,223 | $19,80512 claims |
| GSKIncruse Ellipta | $125,100 | $4,84915 claims |
| AbbVieSynthroid | $59,128 | $49511 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 799 infectious disease providers in New York.
Other infectious disease in Bronx
- Barry ZingmanBronx$1.7M
- Norbert BrauBronx$1.6M
- Paul RiskaBronx$292K
- Eric MeyerowitzBronx$241K
- Julian Torres IsasigaBronx$232K
- Wafaa El SadrNew York$119.1M
- Judith AbergNew York$14.8M
- Stephen ThomasSyracuse$6.2M
- Edward WalshRochester$3.9M
- Magdalena SobieszczykNew York$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.