Abraham Chyung, MD
Neurology · Honolulu, HINPI 1073590725
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 96.0% of the total across 254 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 48 manufacturers, the largest accounting for just 12.1% — the pattern of someone who eats at a lot of different presentations. Reporting peaked in 2019 at $2,598 and has fallen 66.9% since, to $859 in 2025.
Across 254 payments — averaging $22.92 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Livanova USA, Inc.$704
- Eisai Inc.$483
- Novartis$419
- AstraZeneca$387
- Sunovion Pharmaceuticals Inc.$365
- Teva Pharmaceuticals USA, Inc.$316
- plus $3K from 42 others
What the payments were for
- Travel & lodging$2023%
- Food & beverage$5,59196%
- Education$290%
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.
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.
- VNS Therapy$704
How this compares
$5,821 in reported general payments places this provider in the 70th percentile of 54 neurology providers in Hawaii.
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 |
|---|---|---|
| Lacosamide | 14 | $946 |
| Memantine Hcl | 23 | $689 |
| Levetiracetam | 22 | $623 |
| Donepezil Hcl | 39 | $509 |
Paid to pharmacies, not to this prescriber.
Other neurology in Honolulu
- Leo MaherHonolulu$382K
- Leah RidgeHonolulu$47K
- Melvin YeeHonolulu$32K
- Kevin KimataHonolulu$24K
- Terry ShimamotoHonolulu$24K
- Michael RussoHonolulu$20K
- Kore LiowHonolulu$15K
- Fay GaoHonolulu$13K
- Sarah GranerHonolulu$10K
- Jeffrey LiuHonolulu$8K
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.