Fen Lei Chang, MD
Neurology · Fort Wayne, INNPI 1841297231
Payments from drug & device makers
What this record shows
This record is dominated by travel and lodging: $3,165 of the $3,822 with a category attached, or 82.8%. Insightec,inc accounts for 92.2% of it on its own, with 5 other manufacturers making up the rest. Reporting peaked in 2022 at $3,526 and has fallen 97.9% since, to $76 in 2025.
Across 16 payments — averaging $238.87 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Insightec,inc$4K
- Eisai Inc.$122
- AbbVie$103
- Portola Pharmaceuticals, LLC$43
- Sunovion Pharmaceuticals Inc.$15
- Boston Scientific$14
Across 6 payments — averaging $7244.33 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.
- Janssen Research & Development, LLC$25K
- Genentech, Inc.$18K
What the payments were for
- Travel & lodging$3,16583%
- Food & beverage$65717%
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 |
|---|---|---|
| Insightec,inc | 6 | $3,526 |
| Eisai Inc. | 1 | $122 |
| AbbVie(2 entities) | 5 | $103 |
| Portola Pharmaceuticals, LLC | 2 | $43 |
| Sunovion Pharmaceuticals Inc. | 1 | $15 |
| Boston Scientific | 1 | $14 |
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
$3,822 in reported general payments places this provider in the 60th percentile of 308 neurology providers in Indiana.
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 |
|---|---|---|
| Avonex Pen (4 Pack)Interferon Beta-1a | 13 | $105,733 |
| NuplazidPimavanserin Tartrate | 13 | $64,970 |
| Felbamate | 13 | $3,721 |
| RivastigmineRivastigmine Tartrate | 37 | $2,349 |
| Memantine Hcl ErMemantine Hcl | 11 | $1,813 |
| Divalproex Sodium | 12 | $1,810 |
| Rasagiline Mesylate | 13 | $1,269 |
| Carbidopa-LevodopaCarbidopa/Levodopa | 26 | $825 |
| Levetiracetam | 27 | $696 |
| Memantine Hcl | 14 | $551 |
| Primidone | 12 | $377 |
| Clonazepam | 24 | $229 |
| Quetiapine Fumarate | 18 | $105 |
| Donepezil Hcl | 12 | $93 |
Paid to pharmacies, not to this prescriber.
Other neurology in Fort Wayne
- Ajay GuptaFort Wayne$411K
- Marlene BultemeyerFort Wayne$277K
- Andrea HallerFort Wayne$242K
- Paul LaterFort Wayne$132K
- Christopher VachonFort Wayne$27K
- William ConteMerrillville$1.2M
- Anthony SimchakLafayette$720K
- Mark JanickiLebanon$573K
- Roderick WarrenEvansville$296K
- Ender AkanMunster$296K
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.