Mark Callanan, MD
Orthopaedic Surgery · Shreveport, LANPI 1639515984
Payments from drug & device makers
What this record shows
The money is spread across several categories — grants (53.9%), travel and lodging and education — rather than concentrated in one kind of arrangement. Arthrex accounts for 76.3% of it on its own, with 13 other manufacturers making up the rest. Reporting peaked in 2019 at $29,102 and has fallen 87.6% since, to $3,616 in 2025.
Across 131 payments — averaging $301.04 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Arthrex$30K
- Smith+Nephew$3K
- Midsouth Orthopedics Inc.$3K
- Stryker$2K
- DJO, LLC$1K
- Zimmer Biomet$542
- plus $598 from 8 others
Across 3 payments — averaging $20,734 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.
- Arthrex$62K
What the payments were for
- Grants$21,25054%
- Travel & lodging$6,95418%
- Food & beverage$4,46111%
- Education$6,67817%
- Gifts$940%
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 |
|---|---|---|
| Arthrex | 64 | $30,082 |
| Smith+Nephew | 15 | $2,712 |
| Midsouth Orthopedics Inc. | 14 | $2,560 |
| Stryker(2 entities) | 10 | $1,691 |
| DJO, LLC | 2 | $1,250 |
| Zimmer Biomet | 8 | $542 |
| Moximed, Inc | 1 | $124 |
| Vericel Corporation | 7 | $123 |
| Exactech, Inc. | 1 | $107 |
| Medical Device Business Services, Inc. | 1 | $105 |
| Sanofi-aventis U.S. LLC | 4 | $69 |
| Amgen | 2 | $31 |
| Bioventus LLC | 1 | $25 |
| Vertex | 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.
- Ascend Flex$644
- BLUEPRINT PATIENT SPECIFIC INSTRUMENTATION$614
- Comprehensive Primary Stem$157
- MISHA Knee System$124
- EQUINOXE$107
- ORTHOCORD$105
- MILAGRO$105
- HEALIX$105
- AEQUALIS PERFORM$102
How this compares
$39,436 in reported general payments places this provider in the 85th percentile of 286 orthopaedic surgery providers in Louisiana.
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 |
|---|---|---|
| Diclofenac Sodium | 101 | $1,119 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 57 | $532 |
| Methocarbamol | 31 | $256 |
| Meloxicam | 49 | $208 |
| Tramadol Hcl | 85 | $192 |
| Ibuprofen | 17 | $149 |
| Methylprednisolone | 20 | $121 |
| Gabapentin | 21 | $108 |
| Cephalexin | 16 | $107 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 15 | $90 |
Paid to pharmacies, not to this prescriber.
Other orthopaedic surgery in Shreveport
- Pierce NunleyShreveport$1.8M
- Steven AtchisonShreveport$170K
- Timothy TalbertShreveport$68K
- Michael NammourShreveport$38K
- Eubulus KerrShreveport$33K
- Massimo MorandiShreveport$28K
- John GoogeShreveport$20K
- Christopher CaldwellShreveport$17K
- Christopher HarrodBaton Rouge$3M
- Vinod DasaKenner$1.9M
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.