Nader Dahdaleh, MD
Neurological Surgery · Chicago, ILNPI 1831307339
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $76,548 of the $86,181 with a category attached, or 88.8%. 14 manufacturers reported payments, led by Depuy Synthes Products, Inc. at 44.9% of the total. Reporting peaked in 2022 at $33,799 and has fallen 97.3% since, to $921 in 2025. Among neurological surgery clinicians in IL with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 101 payments — averaging $853.28 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Depuy Synthes Products, Inc.$39K
- Medical Device Business Services, Inc.$20K
- Stryker$15K
- Medtronic$5K
- Johnson & Johnson$4K
- Spinal Elements, Inc.$2K
- plus $2K from 8 others
Across 19 payments — averaging $2989.83 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$43K
- Seaspine Orthopedics Corporation$14K
What the payments were for
- Consulting fees$76,54889%
- Travel & lodging$4,0045%
- Food & beverage$5,6307%
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 |
|---|---|---|
| Depuy Synthes Products, Inc. | 28 | $38,680 |
| Medical Device Business Services, Inc. | 15 | $19,648 |
| Stryker | 13 | $15,057 |
| Medtronic(2 entities) | 14 | $5,062 |
| Johnson & Johnson(2 entities) | 19 | $3,957 |
| Spinal Elements, Inc. | 1 | $1,800 |
| Kuros Biosciences USA, Inc | 2 | $944 |
| Seaspine Orthopedics Corporation | 2 | $307 |
| Alphatec Spine, Inc | 1 | $195 |
| Si-bone, Inc. | 1 | $164 |
| Boston Scientific | 1 | $147 |
| Augmedics Inc. | 1 | $101 |
| Globus Medical(2 entities) | 2 | $96 |
| Nalu Medical, Inc. | 1 | $24 |
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.
- SYMPHONY$36,170
- AIRO$14,650
- LOTUS$1,800
- ZEVO$1,750
- PRESTIGE LP CERVICAL DISC SYSTEM$1,250
- INFINITY OCCIPITOCERVICAL UPPER THORACIC SYSTEM$1,100
- Xvision$503
- ACF$350
- INVICTUS OPEN$195
- GRAFTONAND GRAFTON PLUSDEMINERALIZED BONE MATRIX (DBM)$184
- EVEREST SPINAL SYSTEM$145
- ACIS$141
- UNiD$130
- UNID_PASS$104
How this compares
$86,181 in reported general payments places this provider in the 90th percentile of 302 neurological surgery providers in Illinois.
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 |
|---|---|---|
| Gabapentin | 71 | $642 |
| Mupirocin | 62 | $349 |
| Methylprednisolone | 22 | $93 |
Paid to pharmacies, not to this prescriber.
Other neurological surgery in Chicago
- Tyler KoskiChicago$2.3M
- Vincent TraynelisChicago$1.8M
- Sergey NeckryshChicago$1.6M
- Richard FesslerChicago$910K
- John OtooleChicago$593K
- Fady CharbelChicago$507K
- Issam AwadChicago$266K
- Mohamad BydonChicago$163K
- Ali AlarajChicago$155K
- Konstantin SlavinChicago$153K
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.