David Parks, MD
Retina Specialist · Lancaster, CANPI 1841381688
Payments from drug & device makers
Across 16 payments — averaging $29.85 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$218
- Regeneron Healthcare Solutions, Inc.$172
- Carl Zeiss Meditec AG$39
- Glaukos Corporation$22
- Optos, Inc.$13
- Novartis$13
What the payments were for
- Food & beverage$43992%
- Gifts$398%
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 | 6 | $218 |
| Regeneron Healthcare Solutions, Inc. | 5 | $172 |
| Carl Zeiss Meditec AG | 2 | $39 |
| Glaukos Corporation | 1 | $22 |
| Optos, Inc. | 1 | $13 |
| Novartis | 1 | $13 |
How this compares
$478 in reported general payments places this provider in the 10th percentile of 187 retina 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 |
|---|---|---|
| Prednisolone Acetate | 121 | $3,689 |
| MoxifloxacinMoxifloxacin Hcl | 71 | $1,203 |
| Latanoprost | 105 | $867 |
| Dorzolamide-TimololDorzolamide Hcl/Timolol Maleat | 38 | $645 |
| Brimonidine Tartrate | 51 | $567 |
| Ketorolac Tromethamine | 13 | $545 |
| Ciprofloxacin Hcl | 13 | $279 |
| Timolol Maleate | 25 | $265 |
Paid to pharmacies, not to this prescriber.
Other retina specialist in Lancaster
- Dante PieramiciSanta Barbara$15.1M
- Margaret ChangSacramento$13.2M
- Hani Salehi-HadHuntington Beach$12.2M
- Payam AminiPasadena$9.9M
- Joel PearlmanSacramento$8.3M
- Dilsher DhootSanta Barbara$8.2M
- Ashkan PirouzFullerton$6.9M
- Roger GoldbergWalnut Creek$5M
- Sean AdreanFullerton$2.9M
- Nathan SteinleSanta Barbara$2.6M
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.