Thomas Chang, MD
Psychiatry · Las Vegas, NVNPI 1043876931
Payments from drug & device makers
Across 34 payments — averaging $19.15 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Otsuka America Pharmaceutical, Inc.$298
- AbbVie$135
- E.r. Squibb & Sons, L.L.C.$77
- Alkermes, Inc.$41
- Lundbeck LLC$39
- Takeda Pharmaceuticals U.S.A., Inc.$38
- plus $23 from 1 others
What the payments were for
- Food & beverage$651100%
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 |
|---|---|---|
| Otsuka America Pharmaceutical, Inc. | 17 | $298 |
| AbbVie | 6 | $135 |
| E.r. Squibb & Sons, L.L.C. | 4 | $77 |
| Alkermes, Inc. | 2 | $41 |
| Lundbeck LLC | 2 | $39 |
| Takeda Pharmaceuticals U.S.A., Inc. | 2 | $38 |
| Indivior Inc. | 1 | $23 |
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.
- ABILIFY MAINTENA$120
How this compares
$651 in reported general payments places this provider in the 55th percentile of 243 psychiatry providers in Nevada.
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 |
|---|---|---|
| IngrezzaValbenazine Tosylate | 23 | $182,535 |
| Clozapine | 22 | $4,137 |
| Duloxetine Hcl | 43 | $1,947 |
| Aripiprazole | 33 | $1,552 |
| Divalproex Sodium | 38 | $1,106 |
| Hydroxyzine Hcl | 47 | $738 |
| Bupropion XlBupropion Hcl | 62 | $721 |
| Mirtazapine | 41 | $493 |
| Lurasidone Hcl | 16 | $471 |
| Haloperidol | 11 | $458 |
| Fluoxetine Hcl | 34 | $367 |
| Trazodone Hcl | 42 | $350 |
| Risperidone | 29 | $340 |
| Quetiapine Fumarate | 36 | $339 |
| Gabapentin | 30 | $327 |
Paid to pharmacies, not to this prescriber.
Other psychiatry in Las Vegas
- Jelena KunovacLas Vegas$12.4M
- Mustafa RawafLas Vegas$5.1M
- Aaron RitterLas Vegas$2.7M
- John AnooshianLas Vegas$836K
- Sam ZandLas Vegas$410K
- Dylan WintLas Vegas$272K
- Akindele KoladeLas Vegas$79K
- Mujeeb ShadLas Vegas$55K
- Dax WolfordLas Vegas$29K
- Faisal SubaLas Vegas$18K
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.