Chunbong Ma, MD
Sports Medicine · San Francisco, CANPI 1750333191
Payments from drug & device makers
What this record shows
The money is spread across several categories — royalties or licence payments (51.6%), consulting fees and travel and lodging — rather than concentrated in one kind of arrangement. Linvatec Corporation accounts for 70.7% of it on its own, with 4 other manufacturers making up the rest. Among sports medicine clinicians in CA with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 183 payments — averaging $2396.39 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Linvatec Corporation$310K
- Stryker$107K
- Zimmer Biomet$21K
- Smith+Nephew$144
- Aesculap Biologics, LLC$127
Across 30 payments — averaging $2779.00 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$82K
- Aesculap Biologics, LLC$2K
What the payments were for
- Royalty or licence$226,31352%
- Consulting fees$172,60039%
- Speaking & faculty fees$7,1042%
- Travel & lodging$29,9087%
- Food & beverage$2,6151%
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 |
|---|---|---|
| Linvatec Corporation | 86 | $310,032 |
| Stryker(2 entities) | 51 | $107,032 |
| Zimmer Biomet | 42 | $21,204 |
| Smith+Nephew | 1 | $144 |
| Aesculap Biologics, LLC | 3 | $127 |
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.
- EZSTART$210,349
- LINVATEC KNEE PRESERVATION SYSTEM$56,280
- 1788$25,444
- BLUEPRINT PSI SYSTEM$16,491
- KNEE BIOLOGICS$15,948
- BLUEPRINT PATIENT SPECIFIC INSTRUMENTATION$15,870
- TORNIER PERFORM REVERSED GLENOID$15,525
- TORNIER PERFORM REVERSED AUGMENTED GLENOID$15,525
- TORNIER PERFORM ANATOMIC AUGMENTED GLENOID$15,525
- SIMPLICITI$13,625
- AEQUALIS PERFORM$12,863
- EZSTART SCREW$12,168
- REUNION$11,944
- LINVATEC SHOULDER ARTHROSCOPY$8,883
- AIM LAPARASCOPES$7,874
- BioBrace 23mm$6,500
- EZSWITCH PORTAL SAVER$3,796
- VERSITOMIC$3,713
- LIVATEC KNEE PRESERVATION SYSTEM$3,122
- AXSOS$2,100
How this compares
$438,540 in reported general payments places this provider in the 95th percentile of 662 sports medicine 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 |
|---|---|---|
| Ibuprofen | 32 | $333 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 19 | $106 |
| Ondansetron Hcl | 26 | $80 |
Paid to pharmacies, not to this prescriber.
Other sports medicine in San Francisco
- Jeffrey HalbrechtSan Francisco$502K
- Alan ZhangSan Francisco$247K
- James ChenSan Francisco$152K
- Neal ElattracheLos Angeles$51M
- Nathaniel CohenLos Gatos$6.4M
- Thomas KnappSanta Monica$2.5M
- Michael FreehillStanford$1.6M
- Allan MishraMenlo Park$1.5M
- Heinz Hoeneckela Jolla$1.4M
- Seth ShermanStanford$1.1M
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.