Adam Dao, MD
Cornea and External Diseases Specialist · San Diego, CANPI 1770870446
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 14 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 3 manufacturers reported payments, led by AbbVie at 44.8% of the total. Reporting peaked in 2019 at $84 and has fallen 71.8% since, to $24 in 2025. That places this record below the midpoint for cornea and external diseases specialist clinicians in CA, where the typical reported total is $4,024.
Across 14 payments — averaging $20.74 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$130
- Alcon$118
- Johnson & Johnson Surgical Vision, Inc.$43
What the payments were for
- Food & beverage$290100%
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 |
|---|---|---|
| AbbVie | 7 | $130 |
| Alcon | 5 | $118 |
| Johnson & Johnson Surgical Vision, Inc. | 2 | $43 |
How this compares
$290 in reported general payments places this provider in the 5th percentile of 50 cornea and external diseases specialist providers in California.
See all cornea and external diseases specialist providers in California →
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 | 101 | $60,979 |
| ValacyclovirValacyclovir Hcl | 36 | $5,989 |
| RhopressaNetarsudil Mesylate | 12 | $4,462 |
| Prednisolone Acetate | 85 | $3,273 |
| Brimonidine Tartrate-TimololBrimonidine Tartrate/Timolol | 14 | $1,840 |
| MoxifloxacinMoxifloxacin Hcl | 82 | $1,746 |
| Difluprednate | 20 | $1,636 |
| Latanoprost | 153 | $1,521 |
| Dorzolamide-TimololDorzolamide Hcl/Timolol Maleat | 66 | $1,440 |
| Timolol Maleate | 116 | $1,207 |
| Brinzolamide | 11 | $999 |
| Neomycin-Polymyxin-DexamethNeomycin/Polymyxin B/Dexametha | 22 | $213 |
| Ketorolac Tromethamine | 14 | $161 |
| Doxycycline Hyclate | 11 | $148 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| AbbVieLumigan | $130 | $60,979101 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 5th percentile of 50 cornea and external diseases specialist providers in California.
Other cornea and external diseases specialist in San Diego
- Eric LinebargerSan Diego$14K
- Tommy KornSan Diego$9K
- Bishoy SaidSan Diego$1K
- Gabriel ValerioSan Diego$935
- Alexi GeevargheseSan Diego$394
- Shyamanga BorooahSan Diego$50
- Sumit GargIrvine$808K
- Jillian ChongBeverly Hills$113K
- Tyson KimSan Francisco$91K
- Edward MancheStanford$78K
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.