Louis Chang, MD
Neurological Surgery · Bethesda, MDNPI 1235265364
Payments from drug & device makers
What this record shows
The money is spread across several categories — travel and lodging (40.5%), food and beverage and consulting fees — rather than concentrated in one kind of arrangement. Globus Medical accounts for 88.4% of it on its own, with 7 other manufacturers making up the rest. Reporting peaked in 2023 at $6,805 and has fallen 98.9% since, to $77 in 2025.
Across 177 payments — averaging $104.19 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Globus Medical$16K
- Boston Scientific$967
- Zimmer Biomet$452
- Medtronic$354
- Microvention, Inc.$117
- Johnson & Johnson$117
- plus $133 from 2 others
Across 15 payments — averaging $3569.24 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.
- Globus Medical$54K
What the payments were for
- Consulting fees$4,00022%
- Travel & lodging$7,47641%
- Food & beverage$6,51435%
- Education$2992%
- Entertainment$1521%
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 |
|---|---|---|
| Globus Medical(2 entities) | 147 | $16,301 |
| Boston Scientific | 9 | $967 |
| Zimmer Biomet | 9 | $452 |
| Medtronic(2 entities) | 6 | $354 |
| Microvention, Inc. | 1 | $117 |
| Johnson & Johnson | 1 | $117 |
| Nevro Corp. | 2 | $101 |
| Orthofix Medical, Inc. | 2 | $32 |
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.
- XLIF$4,980
- ExcelsiusGPS Robotic Navigation System$2,785
- Excelsius Robotics System$1,700
- Pulse$1,317
- EXCELSIUS$1,104
- ALIF$503
- Mobi-C$340
- CREO$306
- RELINE$305
- ACP$282
- GENERAL PAIN MANAGEMENT$248
- BASE$168
- WaveWriter Alpha Prime 16$163
- MaXcess$157
- TLIF$152
- Modulus$152
- INTELLIS$146
- Sable$141
- CoRoent$134
- AttraX$134
How this compares
$18,442 in reported general payments places this provider in the 75th percentile of 133 neurological 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.
Other neurological surgery in Bethesda
- Edjah NduomBethesda$18K
- Kristopher HootenBethesda$17K
- Zachary LevineBethesda$14K
- Alexander CoonBaltimore$2.7M
- Charles SansurBaltimore$1.8M
- Faheem SandhuClinton$1.5M
- Nicholas TheodoreBaltimore$833K
- Daniel SciubbaBaltimore$789K
- Hugo BenalcazarBel Air$380K
- Henry BremBaltimore$353K
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.