Derek Amanatullah, MD
Adult Reconstructive Orthopaedic Surgery · Stanford, CANPI 1134386576
Payments from drug & device makers
Across 554 payments — averaging $1687.00 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Exactech, Inc.$334K
- Stryker$262K
- Medacta USA, Inc.$99K
- Medical Device Business Services, Inc.$71K
- Depuy Synthes Products, Inc.$34K
- Restor3d, Inc.$31K
- plus $104K from 21 others
Across 3 payments — averaging $6294.17 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.
- Zimmer Biomet$17K
- Omnilife Science, Inc$2K
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 |
|---|---|---|
| Exactech, Inc. | 57 | $333,741 |
| Stryker | 165 | $262,113 |
| Medacta USA, Inc. | 63 | $99,475 |
| Medical Device Business Services, Inc. | 70 | $70,637 |
| Depuy Synthes Products, Inc. | 29 | $33,811 |
| Restor3d, Inc. | 16 | $31,133 |
| Johnson & Johnson(3 entities) | 34 | $22,441 |
| Zimmer Biomet | 37 | $21,840 |
| Smith+Nephew | 15 | $15,713 |
| UOC USA Inc | 11 | $14,847 |
| Onkos Surgical, Inc. | 6 | $8,279 |
| Bone Support Inc. | 3 | $4,809 |
| Heraeus Medical, LLC. | 3 | $4,188 |
| Omnilife Science, Inc | 3 | $2,748 |
| Globus Medical | 7 | $2,681 |
| Think Surgical, Inc. | 6 | $1,965 |
| Davol Inc. | 2 | $1,255 |
| Acera Surgical, Inc. | 6 | $887 |
| Encore Medical, LP | 5 | $631 |
| Medtronic | 6 | $355 |
| Innovation Technologies Inc | 1 | $234 |
| Microport Orthopedics Inc | 2 | $233 |
| Biocomposites Inc | 2 | $155 |
| Osteoremedies, LLC | 1 | $140 |
| Kerecis Limited | 1 | $113 |
| Convatec Inc. | 1 | $99 |
| Orthosensor Inc. | 2 | $74 |
How this compares
$934,596 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 Stanford
- William MaloneyStanford$11.1M
- James HuddlestonStanford$2.2M
- Jessica HooperStanford$145K
- Matthew MillerStanford$93K
- Jason LipofStanford$51K
- Stuart GoodmanStanford$23K
- James CaillouetteNewport Beach$4.8M
- William LongLos Angeles$2.8M
- John DearbornMenlo Park$2.5M
- William Bugbeela Jolla$2.2M
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.