Marc Grossman, MD
Physical Medicine & Rehabilitation · Rockville, MDNPI 1043422306
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 38 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. It is spread thinly across 24 manufacturers, the largest accounting for just 20.3% — the pattern of someone who eats at a lot of different presentations.
Across 38 payments — averaging $25.66 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Zimmer Biomet$198
- Pfizer$104
- Shield Therapeutics Inc$85
- GSK$59
- Alnylam Pharmaceuticals Inc.$55
- Exact Sciences$53
- plus $422 from 18 others
What the payments were for
- Food & beverage$975100%
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 |
|---|---|---|
| Zimmer Biomet | 1 | $198 |
| Pfizer | 6 | $104 |
| Shield Therapeutics Inc | 3 | $85 |
| GSK | 3 | $59 |
| Alnylam Pharmaceuticals Inc. | 3 | $55 |
| Exact Sciences | 2 | $53 |
| Novo Nordisk | 2 | $38 |
| AbbVie | 2 | $38 |
| Pacira Therapeutics, Inc. | 1 | $30 |
| Boehringer Ingelheim | 1 | $30 |
| Corcept Therapeutics | 1 | $26 |
| Johnson & Johnson | 1 | $25 |
| Xeris Pharmaceuticals, Inc. | 1 | $25 |
| Inspire Medical Systems, Inc. | 1 | $23 |
| Merck | 1 | $22 |
| Sanofi | 1 | $21 |
| AstraZeneca | 1 | $20 |
| Phathom Pharmaceuticals, Inc. | 1 | $20 |
| Amarin Pharma, Inc. | 1 | $19 |
| Phadia US Inc. | 1 | $18 |
| Medtronic | 1 | $18 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 1 | $17 |
| Boston Scientific | 1 | $16 |
| Esperion Therapeutics, Inc. | 1 | $15 |
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
$975 in reported general payments places this provider in the 75th percentile of 202 physical medicine & rehabilitation providers in Maryland.
See all physical medicine & rehabilitation providers in Maryland →
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 |
|---|---|---|
| Celecoxib | 35 | $1,062 |
| Gabapentin | 103 | $638 |
| Diclofenac Sodium | 25 | $455 |
| Methylprednisolone | 29 | $187 |
| Cyclobenzaprine Hcl | 21 | $184 |
| Tramadol Hcl | 13 | $70 |
| Oxycodone Hcl | 13 | $42 |
| Meloxicam | 11 | $19 |
Paid to pharmacies, not to this prescriber.
Other physical medicine & rehabilitation in Rockville
- Nina RajaeiRockville$851
- David ItskevichRockville$658
- David ReeceBethesda$719K
- Gurtej SinghCatonsville$205K
- Akhil ChhatreBaltimore$169K
- Justin WassermanBethesda$51K
- Vivek SindhiGlen Burnie$33K
- Inai MkandawireOwings Mills$23K
- Cheryl MejiaHagerstown$20K
- Ronald ShinBaltimore$19K
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.