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Michael Krosin, MD

Orthopaedic Surgery · Castro Valley, CANPI 1578705000

Payments from drug & device makers

What this record shows

This record is dominated by consulting fees: $61,436 of the $74,293 with a category attached, or 82.7%. Paragon 28, Inc. accounts for 66.1% of it on its own, with 18 other manufacturers making up the rest. Reporting peaked in 2023 at $42,568 and has fallen 94.3% since, to $2,419 in 2025. Among orthopaedic surgery clinicians in CA with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.

$74,293in general payments, 2019–2025

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

19
20
21
22
23
24
25

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.

CompanyPaymentsTotal
Paragon 28, Inc.19$49,139
Medical Device Business Services, Inc.11$17,345
Johnson & Johnson30$2,683
Smith+Nephew16$1,315
Arthrex1$1,250
Kerecis Limited6$720
Synthes GmbH1$500
Stryker5$259
Evolution Surgical, Inc3$201
Integra Lifesciences Corporation6$192
Globus Medical6$191
My01 Inc.2$156
Zimmer Biomet1$137
Orthofix Medical, Inc.3$66
Organogenesis Inc.2$45
Bioventus LLC1$32
Sanara Medtech Inc.1$28
Acera Surgical, Inc.1$22
Biocomposites Inc1$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.

How this compares

$74,293 in reported general payments places this provider in the 90th percentile of 1,808 orthopaedic surgery providers in California.

See all orthopaedic surgery providers in California →

Medicare billing

Part B allowed, 2024
$176,605
Medicare patients
219
Services billed
1,229

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

DrugClaimsCost to plans & patients
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen31$478
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen38$416
Diclofenac Sodium34$403
Hydroxyzine Hcl13$87
Ondansetron Hcl17$64
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim12$52

Paid to pharmacies, not to this prescriber.

Other orthopaedic surgery in Castro Valley

See the full list for California →

Where these figures come from

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