David Chang, MD
Orthopaedic Surgery of the Spine · Marina del Rey, CANPI 1467575472
Payments from drug & device makers
Across 25 payments — averaging $2892.16 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Osseus Fusion Systems, LLC$71K
- Xtant Medical Inc$850
- Providence Medical Technology, Inc.$49
- Medtronic$25
- Globus Medical$21
- Johnson & Johnson$16
What the payments were for
- Royalty or licence$70,63698%
- Consulting fees$1,4732%
- Food & beverage$1950%
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 |
|---|---|---|
| Osseus Fusion Systems, LLC | 17 | $71,342 |
| Xtant Medical Inc | 1 | $850 |
| Providence Medical Technology, Inc. | 4 | $49 |
| Medtronic | 1 | $25 |
| Globus Medical | 1 | $21 |
| Johnson & Johnson | 1 | $16 |
How this compares
$72,304 in reported general payments places this provider in the 65th percentile of 288 orthopaedic surgery of the spine providers in California.
See all orthopaedic surgery of the spine 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 |
|---|---|---|
| Gabapentin | 26 | $618 |
| Pregabalin | 17 | $338 |
| Methylprednisolone | 42 | $292 |
| Diclofenac Sodium | 13 | $80 |
Paid to pharmacies, not to this prescriber.
Other orthopaedic surgery of the spine in Marina del Rey
- Sanjay KhuranaMarina del Rey$2.3M
- Robert WatkinsMarina del Rey$443K
- Robert WatkinsMarina del Rey$218K
- Hyun BaeSanta Monica$62.2M
- Choll KimSan Diego$4M
- Stacey BedermanOrange$3.7M
- Gregory Mundisla Jolla$3.5M
- Neelakantan AnandLos Angeles$3.2M
- Paul SlosarDaly City$3.1M
- Babak Barcohanavan Nuys$2.9M
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.