W Calvin, MD
Ophthalmology · Northridge, CANPI 1649212895
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 13 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 7 manufacturers reported payments, led by Oyster Point Pharma, Inc. at 46.6% of the total. That places this record below the midpoint for ophthalmology clinicians in CA, where the typical reported total is $1,218.
Across 13 payments — averaging $22.77 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Oyster Point Pharma, Inc.$138
- Sun Pharmaceutical Industries Inc.$34
- Amgen$33
- Dompe US, Inc.$30
- Thea Pharma Inc.$22
- AbbVie$20
- plus $19 from 1 others
What the payments were for
- Food & beverage$296100%
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 |
|---|---|---|
| Oyster Point Pharma, Inc. | 6 | $138 |
| Sun Pharmaceutical Industries Inc. | 1 | $34 |
| Amgen | 2 | $33 |
| Dompe US, Inc. | 1 | $30 |
| Thea Pharma Inc. | 1 | $22 |
| AbbVie | 1 | $20 |
| Tarsus Pharmaceuticals, Inc. | 1 | $19 |
How this compares
$296 in reported general payments places this provider in the 25th percentile of 2,513 ophthalmology 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 |
|---|---|---|
| Travatan ZTravoprost | 18 | $6,340 |
| Timolol Maleate | 78 | $3,692 |
| Travoprost | 25 | $2,885 |
| Brimonidine Tartrate | 22 | $2,460 |
| Latanoprost | 132 | $2,055 |
| Prednisolone Acetate | 37 | $1,684 |
| MoxifloxacinMoxifloxacin Hcl | 34 | $738 |
| Dorzolamide-TimololDorzolamide Hcl/Timolol Maleat | 24 | $341 |
| Neomycin-Polymyxin-DexamethNeomycin/Polymyxin B/Dexametha | 24 | $201 |
Paid to pharmacies, not to this prescriber.
Other ophthalmology in Northridge
- Mitchell ShultzNorthridge$524K
- Daniel SchwartzSan Francisco$8M
- Michael BerlinWest Hollywood$5.7M
- Gilbert KlimanMenlo Park$1.5M
- Kuldev SinghStanford$1.5M
- Raymond DouglasBeverly Hills$1.3M
- John AffeldtLoma Linda$1.1M
- Srinivas SaddaPasadena$1M
- Sheri RowenNewport Beach$1M
- Savak TeymoorianLaguna Hills$955K
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.