Joseph Gunn, MD
Retina Specialist · Kingsport, TNNPI 1316943640
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 52 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 11 manufacturers reported payments, led by Genentech USA, Inc. at 30.6% of the total. Reporting peaked in 2022 at $597 and has fallen 64.5% since, to $212 in 2025. That places this record below the midpoint for retina specialist clinicians in TN, where the typical reported total is $3,018.
Across 52 payments — averaging $36.94 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Genentech USA, Inc.$587
- Alcon$552
- Alimera Sciences, Inc.$324
- Regeneron Healthcare Solutions, Inc.$295
- Apellis Pharmaceuticals, Inc.$29
- Sandoz$28
- plus $105 from 5 others
What the payments were for
- Food & beverage$1,921100%
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 |
|---|---|---|
| Genentech USA, Inc. | 18 | $587 |
| Alcon | 7 | $552 |
| Alimera Sciences, Inc. | 10 | $324 |
| Regeneron Healthcare Solutions, Inc. | 10 | $295 |
| Apellis Pharmaceuticals, Inc. | 1 | $29 |
| Sandoz | 1 | $28 |
| Galderma Laboratories, L.p. | 1 | $26 |
| Astellas Pharma US Inc | 1 | $23 |
| Novartis | 1 | $21 |
| Coherus Oncology, Inc. | 1 | $18 |
| Bausch & Lomb, A Division Of Bausch Health US, LLC | 1 | $16 |
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.
- Iluvien$143
- Unity$127
- Constellation$123
- EYLEA HD$117
How this compares
$1,921 in reported general payments places this provider in the 35th percentile of 58 retina specialist providers in Tennessee.
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 |
|---|---|---|
| Ketorolac Tromethamine | 304 | $7,203 |
| Atropine Sulfate | 37 | $1,662 |
| Prednisolone Acetate | 31 | $1,539 |
| Dorzolamide-TimololDorzolamide Hcl/Timolol Maleat | 67 | $964 |
| Neomycin-Polymyxin-DexamethNeomycin/Polymyxin B/Dexametha | 76 | $952 |
| Brimonidine Tartrate | 14 | $263 |
| Dorzolamide Hcl | 11 | $243 |
| Promethazine Hcl | 37 | $116 |
| Timolol Maleate | 13 | $97 |
| Latanoprost | 20 | $63 |
Paid to pharmacies, not to this prescriber.
Other retina specialist in Kingsport
- Mark KleinmanKingsport$18K
- Howard CummingsKingsport$2K
- Cristoforo LarzoKingsport$1K
- Michael MageeKingsport$901
- Steve CharlesGermantown$5.8M
- Carl AwhNashville$1.3M
- Peter SonkinNashville$949K
- Brandon BusbeeNashville$566K
- Eric SchneiderNashville$134K
- David ReichsteinNashville$114K
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.