John Diana, MD
Adult Reconstructive Orthopaedic Surgery · Napa, CANPI 1649297540
Payments from drug & device makers
What this record shows
This record is dominated by royalties or licence payments: $945,406 of the $981,059 with a category attached, or 96.4%. Ortho Development Corporation accounts for 98.5% of it on its own, with 8 other manufacturers making up the rest. Among adult reconstructive orthopaedic surgery clinicians in CA with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 160 payments — averaging $6131.62 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Ortho Development Corporation$967K
- Stryker$11K
- Zimmer Biomet$3K
- Avanos Medical$478
- Heron Therapeutics, Inc.$115
- Medacta USA, Inc.$115
- plus $188 from 3 others
Across 20 payments — averaging $4222.29 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Stryker$84K
What the payments were for
- Royalty or licence$945,40696%
- Consulting fees$5,8001%
- Speaking & faculty fees$15,0002%
- Travel & lodging$10,6751%
- Food & beverage$4,1780%
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 | 30 | $10,871 |
| 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 |
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.
- Entrada Hip Stem$692,435
- ENTRADA$249,137
- MAKO$6,222
- TRITANIUM$4,049
- ROSA$1,587
- Persona$926
- Taperloc$804
- ON-Q* PUMP AND ACCESSORIES$399
- ROSA-Knee$248
- ROSA-One$124
- BKS Revision$116
- QUADRA$115
How this compares
$981,059 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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Amoxicillin | 187 | $341 |
| Oxycodone Hcl | 12 | $81 |
| Clindamycin Hcl | 24 | $57 |
| Tramadol Hcl | 24 | $54 |
Paid to pharmacies, not to this prescriber.
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
- William Bugbeela Jolla$2.1M
- James HuddlestonStanford$1.5M
- Alexander SahFremont$1.2M
- Thomas DonaldsonColton$893K
- Derek AmanatullahStanford$828K
- Nathanael HeckmannLos Angeles$722K
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.