Denis O Brien, MD
Orthopaedic Surgery · Olney, MDNPI 1427053339
Payments from drug & device makers
What this record shows
This record is dominated by travel and lodging: $1,057 of the $1,588 with a category attached, or 66.6%. Supreme Orthopedic Systems, LLC accounts for 79.6% of it on its own, with 5 other manufacturers making up the rest. 2025 is the largest year on record at $1,140, 7.2 times the $159 reported in 2019. That places this record below the midpoint for orthopaedic surgery clinicians in MD, where the typical reported total is $2,738.
Across 18 payments — averaging $88.24 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Supreme Orthopedic Systems, LLC$1K
- Pacira Therapeutics, Inc.$138
- Miach Orthopaedics, Inc.$123
- Arthrex$24
- Medical Device Business Services, Inc.$21
- Fidia Pharma USA Inc.$19
What the payments were for
- Travel & lodging$1,05767%
- Food & beverage$53133%
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 |
|---|---|---|
| Supreme Orthopedic Systems, LLC | 6 | $1,264 |
| Pacira Therapeutics, Inc. | 8 | $138 |
| Miach Orthopaedics, Inc. | 1 | $123 |
| Arthrex | 1 | $24 |
| Medical Device Business Services, Inc. | 1 | $21 |
| Fidia Pharma USA Inc. | 1 | $19 |
How this compares
$1,588 in reported general payments places this provider in the 40th percentile of 378 orthopaedic surgery providers in Maryland.
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 |
|---|---|---|
| Methylprednisolone | 184 | $1,493 |
| Cyclobenzaprine Hcl | 186 | $984 |
| Meloxicam | 217 | $842 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 33 | $295 |
| Cephalexin | 31 | $275 |
| Ondansetron OdtOndansetron | 24 | $244 |
| Oxycodone Hcl | 40 | $178 |
| Tramadol Hcl | 52 | $167 |
| Ibuprofen | 18 | $95 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 15 | $92 |
Paid to pharmacies, not to this prescriber.
Other orthopaedic surgery in Olney
- Mark MyersonBaltimore$10.5M
- David DaluryTowson$7.6M
- Anand MurthiBaltimore$3.7M
- Timothy CoddTowson$3.6M
- Khaled KebaishBaltimore$3M
- Michael AinLutherville$1.6M
- Shawn StandardBaltimore$1.4M
- Hamid HassanzadehBethesda$1.1M
- Paul SponsellerBaltimore$958K
- Paul TortolaniTowson$812K
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.