Joyce Sun
Adult Medicine · Rockville, MDNPI 1932588662
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 98.0% of the total across 44 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 24 manufacturers reported payments, led by AstraZeneca at 24.9% of the total. Reporting peaked in 2022 at $922 and has fallen 68.0% since, to $295 in 2025. Among adult medicine clinicians in MD 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 44 payments — averaging $58.04 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$635
- Acadia Pharmaceuticals Inc$238
- Boston Scientific$149
- Axsome Therapeutics, Inc.$122
- Urovant Sciences Inc$120
- Amarin Pharma, Inc.$117
- plus $1K from 18 others
What the payments were for
- Food & beverage$2,50398%
- Education$512%
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 |
|---|---|---|
| AstraZeneca(2 entities) | 7 | $635 |
| Acadia Pharmaceuticals Inc | 4 | $238 |
| Boston Scientific | 2 | $149 |
| Axsome Therapeutics, Inc. | 1 | $122 |
| Urovant Sciences Inc | 1 | $120 |
| Amarin Pharma, Inc. | 1 | $117 |
| BD | 1 | $107 |
| Johnson & Johnson | 1 | $104 |
| Otsuka America Pharmaceutical, Inc. | 2 | $103 |
| KCI USA, Inc. | 1 | $98 |
| Otsuka Pharmaceutical Development & Commercialization, Inc. | 1 | $97 |
| Daiichi Sankyo Inc. | 1 | $96 |
| Ironshore Pharmaceuticals Inc. | 2 | $94 |
| Zealand Pharma US, Inc. | 1 | $86 |
| Amgen | 4 | $86 |
| Novo Nordisk | 4 | $72 |
| Lilly USA, LLC | 1 | $53 |
| Boehringer Ingelheim | 2 | $51 |
| Bayer | 2 | $33 |
| Sanofi Pasteur Inc. | 1 | $24 |
| Exact Sciences | 1 | $21 |
| Novartis | 1 | $19 |
| Biogen | 1 | $18 |
| Avanir Pharmaceuticals, Inc. | 1 | $12 |
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
$2,554 in reported general payments places this provider in the 90th percentile of 34 adult medicine providers in Maryland.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| EliquisApixaban | 24 | $16,272 |
| JanuviaSitagliptin Phosphate | 12 | $7,021 |
| MyrbetriqMirabegron | 12 | $5,669 |
| Basaglar Kwikpen U-100Insulin Glargine,hum.Rec.Anlog | 31 | $3,581 |
| PradaxaDabigatran Etexilate Mesylate | 21 | $2,918 |
| Quetiapine Fumarate | 47 | $1,138 |
| Mirtazapine | 23 | $856 |
| Memantine Hcl ErMemantine Hcl | 12 | $758 |
| Albuterol Sulfate | 12 | $724 |
| Losartan Potassium | 51 | $697 |
| Amlodipine Besylate | 64 | $555 |
| Omeprazole | 23 | $534 |
| Clozapine | 14 | $479 |
| Venlafaxine Hcl ErVenlafaxine Hcl | 13 | $467 |
| Citalopram HbrCitalopram Hydrobromide | 25 | $450 |
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 |
|---|---|---|
| Boehringer IngelheimPradaxa | $51 | $2,91821 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 90th percentile of 34 adult medicine providers in Maryland.
Other adult medicine in Rockville
- Xavier KeeRockville$59
- Derek McCoyBel Air$3K
- Mikhail GendelGaithersburg$3K
- Achankunj ChackoTakoma Park$2K
- Holly HooverCumberland$1K
- Tracy TurnerAnnapolis$1K
- Vivien ToColumbia$1K
- Kamakshi BaigWhite Plains$810
- Elsie KamaraGermantown$788
- Asha ValiSilver Spring$692
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.