Nicholas Callahan, DO
Orthopaedic Surgery · Mayfield Heights, OHNPI 1659783934
Payments from drug & device makers
What this record shows
This record is dominated by travel and lodging: $12,466 of the $17,987 with a category attached, or 69.3%. Medacta USA, Inc. accounts for 60.4% of it on its own, with 12 other manufacturers making up the rest. Reporting peaked in 2019 at $8,309 and has fallen 64.5% since, to $2,949 in 2025.
Across 133 payments — averaging $135.24 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medacta USA, Inc.$11K
- Zimmer Biomet$3K
- Rock Medical Orthopedics, Inc.$1K
- Microport Orthopedics Inc$1K
- Pacira Pharmaceuticals Incorporated$580
- Stryker$365
- plus $872 from 7 others
What the payments were for
- Travel & lodging$12,46669%
- Food & beverage$4,13123%
- Education$1,3908%
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 |
|---|---|---|
| Medacta USA, Inc. | 70 | $10,872 |
| Zimmer Biomet | 27 | $2,761 |
| Rock Medical Orthopedics, Inc. | 4 | $1,457 |
| Microport Orthopedics Inc | 9 | $1,080 |
| Pacira Pharmaceuticals Incorporated | 4 | $580 |
| Stryker | 4 | $365 |
| Medtronic | 5 | $311 |
| Arthrex | 5 | $304 |
| Medical Device Business Services, Inc. | 1 | $190 |
| Pfizer | 1 | $26 |
| Bioventus LLC | 1 | $16 |
| Endo Pharmaceuticals Inc. | 1 | $14 |
| Nextstep Arthropedix, LLC | 1 | $10 |
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.
- GMK SPHERE$6,524
- AMISTEM$4,355
- MPO Medial Pivot Knee$859
- Comprehensive Shoulder System$631
- Arcos$620
- Iovera$545
- PRIMARY SHOULDER$438
- Identity$277
- AEQUALIS FLEX REVIVE$174
- AQUAMANTYS$170
- AEQUALIS PERFORM$150
- Persona$145
- Avenir$102
How this compares
$17,987 in reported general payments places this provider in the 80th percentile of 794 orthopaedic surgery providers in Ohio.
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 |
|---|---|---|
| Ondansetron OdtOndansetron | 60 | $538 |
| Cefadroxil | 38 | $321 |
| Oxycodone Hcl | 49 | $259 |
| Pantoprazole Sodium | 25 | $90 |
| Meloxicam | 47 | $88 |
| Cephalexin | 12 | $62 |
| Methylprednisolone | 11 | $39 |
| Amoxicillin | 11 | $14 |
Paid to pharmacies, not to this prescriber.
Other orthopaedic surgery in Mayfield Heights
- Louis KepplerMayfield Heights$173K
- Reuben GobezieCleveland$12M
- Gregory BerletWorthington$9.6M
- Wael BarsoumCleveland$8.9M
- Brian CohenChillicothe$8.8M
- Joseph IannottiCleveland$7.1M
- John SontichYoungstown$3.6M
- Anthony MiniaciCleveland$3.1M
- David WelkerMiamisburg$2.8M
- Kenneth GreeneCleveland$2.6M
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.