Michael Krosin, MD
Orthopaedic Surgery · Castro Valley, CANPI 1578705000
Payments from drug & device makers
Across 116 payments — averaging $640.46 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Paragon 28, Inc.$49K
- Medical Device Business Services, Inc.$17K
- Johnson & Johnson$3K
- Smith+Nephew$1K
- Arthrex$1K
- Kerecis Limited$720
- plus $2K from 13 others
What the payments were for
- Consulting fees$61,43683%
- Speaking & faculty fees$1,7502%
- Travel & lodging$5,0147%
- Food & beverage$6,0938%
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 |
|---|---|---|
| Paragon 28, Inc. | 19 | $49,139 |
| Medical Device Business Services, Inc. | 11 | $17,345 |
| Johnson & Johnson | 30 | $2,683 |
| Smith+Nephew | 16 | $1,315 |
| Arthrex | 1 | $1,250 |
| Kerecis Limited | 6 | $720 |
| Synthes GmbH | 1 | $500 |
| Stryker | 5 | $259 |
| Evolution Surgical, Inc | 3 | $201 |
| Integra Lifesciences Corporation | 6 | $192 |
| Globus Medical | 6 | $191 |
| My01 Inc. | 2 | $156 |
| Zimmer Biomet | 1 | $137 |
| Orthofix Medical, Inc. | 3 | $66 |
| Organogenesis Inc. | 2 | $45 |
| Bioventus LLC | 1 | $32 |
| Sanara Medtech Inc. | 1 | $28 |
| Acera Surgical, Inc. | 1 | $22 |
| Biocomposites Inc | 1 | $13 |
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.
- Portfolio$27,118
- Product Portfolio$20,010
- NA$5,732
- MONKEY RINGS$1,704
- Kerecis Omega3 SurgiClose$984
- Kerecis Omega3 Marigen$971
- Taylor Spatial Frame$882
- MOTOBAND$738
- Kerecis Omega3 GraftGuide$489
- HAMMERLOCK$224
- BME NITINOL CONTINUOUS COMPRESSION IMPLANTS$140
- ViviGen$140
- DISTRACTION OSTEOGENESIS SYSTEMS$140
- MY01 Continuous Compartmental Pressure Monitor$138
- G7$137
- Arcos$137
- Avenir$137
- Persona$137
- VA-LCP$110
- FIBERGRAFT BG Morsels$109
How this compares
$74,293 in reported general payments places this provider in the 85th percentile of 1,808 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 |
|---|---|---|
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 31 | $478 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 38 | $416 |
| Diclofenac Sodium | 34 | $403 |
| Hydroxyzine Hcl | 13 | $87 |
| Ondansetron Hcl | 17 | $64 |
| Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim | 12 | $52 |
Paid to pharmacies, not to this prescriber.
Other orthopaedic surgery in Castro Valley
- Bradford HackArcadia$18.3M
- Robert GorabOrange$14.5M
- Kelly VinceLos Angeles$9.6M
- Stephen HowellSacramento$9.4M
- Thomas CoonRed Bluff$9.2M
- Peter NewtonSan Diego$7M
- Nirav AminPlacentia$5.8M
- Tom NorrisSan Francisco$5.3M
- Jay LiebermanLos Angeles$4.8M
- Sigurd BervenSan Francisco$4.1M
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.