Darin Haivala, MD
Ophthalmology · Oklahoma City, OKNPI 1689641342
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 94.0% of the total across 20 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 10 manufacturers, the largest accounting for just 23.2% — the pattern of someone who eats at a lot of different presentations. Reporting peaked in 2023 at $265 and has fallen 59.3% since, to $108 in 2025. That places this record below the midpoint for ophthalmology clinicians in OK, where the typical reported total is $950.
Across 20 payments — averaging $30.69 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Alcon$142
- Regeneron Healthcare Solutions, Inc.$114
- Apellis Pharmaceuticals, Inc.$85
- Genentech USA, Inc.$79
- Coherus Oncology, Inc.$65
- Astellas Pharma US Inc$45
- plus $83 from 4 others
What the payments were for
- Food & beverage$57794%
- Gifts$376%
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 |
|---|---|---|
| Alcon | 3 | $142 |
| Regeneron Healthcare Solutions, Inc. | 1 | $114 |
| Apellis Pharmaceuticals, Inc. | 3 | $85 |
| Genentech USA, Inc. | 3 | $79 |
| Coherus Oncology, Inc. | 3 | $65 |
| Astellas Pharma US Inc | 2 | $45 |
| Novartis | 2 | $32 |
| Carl Zeiss Meditec AG | 1 | $19 |
| Carl Zeiss Meditec, Inc. | 1 | $17 |
| Alimera Sciences, Inc. | 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.
- EYLEA HD$114
How this compares
$614 in reported general payments places this provider in the 40th percentile of 183 ophthalmology providers in Oklahoma.
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 |
|---|---|---|
| LumiganBimatoprost | 18 | $5,507 |
| Prednisolone Acetate | 78 | $2,248 |
| MoxifloxacinMoxifloxacin Hcl | 27 | $619 |
| Ofloxacin | 24 | $226 |
| Latanoprost | 29 | $122 |
| ErythromycinErythromycin Base | 15 | $114 |
| Timolol Maleate | 22 | $94 |
Paid to pharmacies, not to this prescriber.
Other ophthalmology in Oklahoma City
- Ronald RebenitschOklahoma City$141K
- Edward JonesOklahoma City$13K
- John BelardoOklahoma City$12K
- David KorberOklahoma City$11K
- Jason NguyenOklahoma City$9K
- Annie ChanOklahoma City$6K
- Lance ScottOklahoma City$5K
- Craig EckOklahoma City$5K
- Valerie LobodiakOklahoma City$4K
- Clifton FayOklahoma City$3K
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.