Keon Chang, MD
Psychiatry · Westland, MINPI 1669451738
Payments from drug & device makers
Across 16 payments — averaging $15.95 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Vanda Pharmaceuticals Inc.$52
- Otsuka America Pharmaceutical, Inc.$43
- Sunovion Pharmaceuticals Inc.$43
- Lundbeck LLC$38
- Shire North American Group Inc$25
- Takeda Pharmaceuticals U.S.A., Inc.$23
- plus $31 from 2 others
What the payments were for
- Food & beverage$25299%
- Education$41%
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.
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.
How this compares
$255 in reported general payments places this provider in the 55th percentile of 1,166 psychiatry providers in Michigan.
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 |
|---|---|---|
| FanaptIloperidone | 11 | $44,202 |
| VraylarCariprazine Hcl | 21 | $36,489 |
| TrintellixVortioxetine Hydrobromide | 24 | $11,931 |
| Lurasidone Hcl | 52 | $9,534 |
| Aripiprazole | 36 | $7,535 |
| Effexor XrVenlafaxine Hcl | 14 | $4,791 |
| Quetiapine Fumarate | 191 | $3,011 |
| Doxepin Hcl | 32 | $2,657 |
| Haloperidol | 61 | $2,360 |
| Desvenlafaxine Succinate ErDesvenlafaxine Succinate | 52 | $2,119 |
| Venlafaxine Hcl ErVenlafaxine Hcl | 94 | $2,020 |
| Chlorpromazine Hcl | 25 | $1,913 |
| Trazodone Hcl | 201 | $1,768 |
| Sertraline Hcl | 215 | $1,713 |
| Bupropion XlBupropion Hcl | 43 | $1,514 |
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 |
|---|---|---|
| Vanda Pharmaceuticals Inc.Fanapt | $52 | $44,20211 claims |
| Takeda Pharmaceuticals U.S.A., Inc.Trintellix | $23 | $11,93124 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 55th percentile of 1,166 psychiatry providers in Michigan.
Other psychiatry in Westland
- Andreas SidiropoulasDetroit$2.8M
- Joel YoungRochester Hills$1.9M
- Welton WashingtonYpsilanti$1.4M
- Rajaprabhakaran RajarethinamAnn Arbor$1.2M
- Eric AchtyesGrand Rapids$705K
- Manzar RajputMonroe$612K
- William GuySouthfield$562K
- Brian MickeyAnn Arbor$490K
- Sagar ParikhAnn Arbor$331K
- Robert LagrouClarkston$267K
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.