Donald Knapke, MD
Orthopaedic Surgery · Troy, MINPI 1366432569
Payments from drug & device makers
Across 382 payments — averaging $1472.40 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Microport Orthopedics Inc$405K
- Zimmer Biomet$128K
- Smith+Nephew$25K
- Medical Device Business Services, Inc.$3K
- Stryker$575
- Heraeus Medical, LLC.$241
- plus $754 from 10 others
Across 1 payment — averaging $1239.00 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$1K
What the payments were for
- Royalty or licence$303,17861%
- Consulting fees$129,46526%
- Speaking & faculty fees$28,6806%
- Travel & lodging$25,5585%
- Food & beverage$9,1972%
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 |
|---|---|---|
| Microport Orthopedics Inc | 182 | $405,287 |
| Zimmer Biomet | 148 | $127,527 |
| Smith+Nephew | 29 | $25,131 |
| Medical Device Business Services, Inc. | 1 | $2,940 |
| Stryker | 6 | $575 |
| Heraeus Medical, LLC. | 3 | $241 |
| Kyocera Medical Technologies, Inc. | 1 | $238 |
| Heron Therapeutics, Inc. | 4 | $125 |
| Medacta USA, Inc. | 1 | $121 |
| Medtronic | 1 | $91 |
| Pacira Therapeutics, Inc. | 1 | $75 |
| Davol Inc. | 1 | $26 |
| Amgen | 1 | $23 |
| Johnson & Johnson | 1 | $22 |
| Linvatec Corporation | 1 | $18 |
| Athena Bioscience, LLC | 1 | $14 |
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.
- MPO Medial Pivot Knee$394,962
- Journey II$53,039
- Persona$32,213
- REAL INTELLIGENCE$22,856
- Journey II XR$11,700
- Persona Revision$11,056
- Oxford$8,875
- MPO Hip System$6,400
- Knees Product Portfolio$6,034
- PD-Knee-New Product$5,000
- AccuFill$4,875
- Trabecular Metal Shapes$4,875
- ACTIS$2,940
- EMPHASYS$2,940
- RECLAIM$2,940
- Legion Revision$1,344
- JOURNEY$1,130
- RI.HIP NAVIGATION$1,130
- Oxford-Knees$743
- POLARSTEM$523
How this compares
$562,456 in reported general payments places this provider in the 95th percentile of 829 orthopaedic surgery providers in Michigan.
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 |
|---|---|---|
| Celecoxib | 30 | $495 |
| Meloxicam | 65 | $482 |
| Methocarbamol | 61 | $387 |
| Tramadol Hcl | 30 | $202 |
| Mupirocin | 27 | $157 |
| Omeprazole | 17 | $111 |
| Methylprednisolone | 20 | $99 |
| Oxycodone Hcl | 22 | $99 |
| Ibuprofen | 13 | $91 |
| Atorvastatin Calcium | 14 | $45 |
Paid to pharmacies, not to this prescriber.
Other orthopaedic surgery in Troy
- Shariff BishaiTroy$1.5M
- Michael FlierlTroy$533K
- Asheesh BediAnn Arbor$9.4M
- Jerome WiaterBeverly Hills$5.7M
- Jad KhalilSouthfield$3.7M
- Mark PintoChelsea$3.2M
- Kyle AndersonBingham Farms$3.1M
- Stephen BartolDetroit$2.6M
- Jeffrey FischgrundSouthfield$1.8M
- David MarkelSouthfield$1.7M
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.