Stephen Chung, MD
Sleep Medicine · Walla Walla, WANPI 1578673703
Payments from drug & device makers
What this record shows
The money is spread across several categories — travel and lodging (52.8%), food and beverage and education — rather than concentrated in one kind of arrangement. Inspire Medical Systems, Inc. accounts for 67.7% of it on its own, with 8 other manufacturers making up the rest. Reporting peaked in 2021 at $688 and has fallen 94.6% since, to $37 in 2025.
Across 21 payments — averaging $57.89 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Inspire Medical Systems, Inc.$823
- Jazz Pharmaceuticals Inc.$210
- Harmony Biosciences LLC$55
- Fisher & Paykel Healthcare Inc$33
- Sunovion Pharmaceuticals Inc.$29
- Natus Medical Incorporated$18
- plus $48 from 3 others
What the payments were for
- Travel & lodging$64253%
- Food & beverage$40433%
- Education$17014%
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 |
|---|---|---|
| Inspire Medical Systems, Inc. | 7 | $823 |
| Jazz Pharmaceuticals Inc. | 4 | $210 |
| Harmony Biosciences LLC | 2 | $55 |
| Fisher & Paykel Healthcare Inc | 1 | $33 |
| Sunovion Pharmaceuticals Inc. | 3 | $29 |
| Natus Medical Incorporated | 1 | $18 |
| Lilly USA, LLC | 1 | $18 |
| Biogen | 1 | $17 |
| EMD Serono, Inc. | 1 | $13 |
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
$1,216 in reported general payments places this provider in the 60th percentile of 67 sleep medicine providers in Washington.
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 |
|---|---|---|
| Armodafinil | 17 | $1,052 |
| Gabapentin | 42 | $344 |
| Ipratropium Bromide | 11 | $341 |
| Ropinirole Hcl | 26 | $284 |
| RivastigmineRivastigmine Tartrate | 14 | $236 |
| Methadone Hcl | 33 | $227 |
| Pramipexole DihydrochloridePramipexole Di-Hcl | 36 | $222 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 11 | $176 |
| Clonazepam | 17 | $62 |
Paid to pharmacies, not to this prescriber.
Other sleep medicine in Walla Walla
- Eric GeilWalla Walla$709
- Muhammad UsamaAuburn$73K
- Vrushali GersappeEverett$56K
- Gandis MazeikaEdmonds$30K
- Meredith BroderickBellevue$8K
- Akhil RaghuramVancouver$7K
- Zeyad MorcosKirkland$6K
- Flavia ConsensSeattle$5K
- Ken HeSeattle$5K
- Teresa JacobsBellevue$5K
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.