John Diana, MD
Adult Reconstructive Orthopaedic Surgery · Napa, CANPI 1649297540
Payments from drug & device makers
Across 180 payments — averaging $5919.47 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Ortho Development Corporation$967K
- Stryker$95K
- Zimmer Biomet$3K
- Avanos Medical$478
- Heron Therapeutics, Inc.$115
- Medacta USA, Inc.$115
- plus $188 from 3 others
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 |
|---|---|---|
| Ortho Development Corporation | 97 | $966,755 |
| Stryker | 50 | $95,316 |
| Zimmer Biomet | 17 | $2,536 |
| Avanos Medical | 5 | $478 |
| Heron Therapeutics, Inc. | 6 | $115 |
| Medacta USA, Inc. | 1 | $115 |
| Johnson & Johnson | 1 | $87 |
| Vertex | 2 | $52 |
| Osteoremedies, LLC | 1 | $50 |
How this compares
$1,065,505 in reported general payments places this provider in the 90th percentile of 136 adult reconstructive orthopaedic surgery providers in California.
See all adult reconstructive orthopaedic surgery 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.
Other adult reconstructive orthopaedic surgery in Napa
- William MaloneyStanford$11.1M
- James CaillouetteNewport Beach$4.8M
- William LongLos Angeles$2.8M
- John DearbornMenlo Park$2.5M
- James HuddlestonStanford$2.2M
- William Bugbeela Jolla$2.2M
- Alexander SahFremont$1.8M
- Louis KwongTorrance$958K
- Derek AmanatullahStanford$935K
- Thomas DonaldsonColton$893K
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.