Isaac Porter, MD
Ophthalmology · Raleigh, NCNPI 1407069727
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (49.6%), consulting fees and travel and lodging — rather than concentrated in one kind of arrangement. 10 manufacturers reported payments, led by Alcon at 42.3% of the total. Reporting peaked in 2019 at $1,770 and has fallen 78.6% since, to $380 in 2024.
Across 38 payments — averaging $126.25 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Alcon$2K
- Johnson & Johnson Surgical Vision, Inc.$2K
- Glaukos Corporation$529
- Carl Zeiss Meditec, Inc.$177
- AbbVie$126
- Biotissue Holdings Inc.$110
- plus $146 from 4 others
What the payments were for
- Consulting fees$1,50031%
- Travel & lodging$91819%
- Food & beverage$2,38050%
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 |
|---|---|---|
| Alcon | 16 | $2,031 |
| Johnson & Johnson Surgical Vision, Inc. | 4 | $1,679 |
| Glaukos Corporation | 7 | $529 |
| Carl Zeiss Meditec, Inc. | 4 | $177 |
| AbbVie(2 entities) | 2 | $126 |
| Biotissue Holdings Inc. | 1 | $110 |
| Ocular Therapeutix, Inc. | 1 | $89 |
| Boston Scientific | 1 | $25 |
| Carl Zeiss Meditec USA, Inc. | 1 | $16 |
| Bausch & Lomb Americas Inc. | 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.
- Catalys Laser System$1,500
- Tecnis 1-piece IOL$1,500
- Tecnis 3-piece IOL$1,500
- Unfolder IOL Delivery Systems$1,500
- Photrexa$273
- NGENUITY$149
- iStent inject Trabecular Micro-Bypass Stent System$144
- Tecnis Simplicity$140
- iStent inject W$137
- KXL System$137
- AcrySof IQ VIVITY IOL$130
- ARGOS$128
- PanOptix$118
- Wavelight$116
- LenSx$114
- VUITY$102
How this compares
$4,798 in reported general payments places this provider in the 80th percentile of 588 ophthalmology providers in North Carolina.
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 |
|---|---|---|
| Brimonidine Tartrate | 14 | $2,377 |
| Latanoprost | 98 | $1,591 |
| Prednisolone Acetate | 23 | $632 |
| ErythromycinErythromycin Base | 47 | $521 |
| Dorzolamide-TimololDorzolamide Hcl/Timolol Maleat | 27 | $476 |
| Doxycycline Monohydrate | 17 | $275 |
| Timolol Maleate | 26 | $161 |
Paid to pharmacies, not to this prescriber.
Other ophthalmology in Raleigh
- Preeya GuptaRaleigh$1.8M
- Maria Stephanie JardelezaRaleigh$15K
- Julie WoodwardDurham$1M
- Rajiv ShahWinston Salem$909K
- Lejla VajzovicDurham$681K
- Karl StonecipherGreensboro$653K
- Terry KimDurham$605K
- Keith WalterWinston Salem$397K
- Leon HerndonDurham$230K
- Thomas MundorfCharlotte$220K
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.