James Chen, MD
Adult Reconstructive Orthopaedic Surgery · Mission Viejo, CANPI 1104210152
Payments from drug & device makers
What this record shows
The money is spread across several categories — consulting fees (49.6%), education and travel and lodging — rather than concentrated in one kind of arrangement. Zimmer Biomet accounts for 77.8% of it on its own, with 15 other manufacturers making up the rest.
Across 626 payments — averaging $793.50 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Zimmer Biomet$387K
- Orthalign Inc$107K
- Stryker$1K
- Medical Device Business Services, Inc.$348
- Smith+Nephew$274
- Engage Uni, LLC$201
- plus $807 from 10 others
Across 13 payments — averaging $384.62 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.
- Canary Medical USA LLC$5K
What the payments were for
- Consulting fees$246,28050%
- Travel & lodging$54,27011%
- Food & beverage$10,7872%
- Education$185,39337%
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 |
|---|---|---|
| Zimmer Biomet | 504 | $386,575 |
| Orthalign Inc | 81 | $107,269 |
| Stryker | 15 | $1,255 |
| Medical Device Business Services, Inc. | 5 | $348 |
| Smith+Nephew | 2 | $274 |
| Engage Uni, LLC | 1 | $201 |
| Johnson & Johnson | 3 | $186 |
| Medacta USA, Inc. | 1 | $164 |
| Gilead | 1 | $125 |
| Heraeus Medical, LLC. | 7 | $118 |
| UOC USA Inc | 1 | $96 |
| Nalu Medical, Inc. | 1 | $31 |
| Linvatec Corporation | 1 | $29 |
| Saxum Surgical, Inc. | 1 | $23 |
| Treace Medical Concepts, Inc. | 1 | $20 |
| Cranial Technologies, Inc | 1 | $16 |
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.
- Persona$127,489
- mymobility Platform$113,266
- ORTHALIGN PLUS$106,392
- ROSA$103,121
- Avenir$3,125
- MAKO$552
- ACTIS$223
- Engage Partial Knee System$201
- Journey II$171
- LEGION TKS$171
- REDAPT$171
- CORI$171
- GMK SPHERE$164
- AXSOS$136
- HOFFMANN$133
- Vemlidy$125
- ATTUNE$122
- VARIAX$109
- PICO$104
- PICO 14$104
How this compares
$496,730 in reported general payments places this provider in the 85th 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 |
|---|---|---|
| EliquisApixaban | 36 | $18,402 |
| Oxycodone Hcl | 100 | $809 |
| Meloxicam | 247 | $584 |
| Celecoxib | 20 | $580 |
| Cefadroxil | 57 | $287 |
| Tramadol Hcl | 81 | $260 |
| Methocarbamol | 57 | $228 |
| Cephalexin | 15 | $194 |
| Gabapentin | 34 | $138 |
| Amoxicillin | 81 | $123 |
| Ondansetron OdtOndansetron | 20 | $86 |
Paid to pharmacies, not to this prescriber.
Other adult reconstructive orthopaedic surgery in Mission Viejo
- 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
- John DianaNapa$981K
- Thomas DonaldsonColton$893K
- Derek AmanatullahStanford$828K
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.