Guido Marra, MD
Orthopaedic Surgery · Chicago, ILNPI 1023082328
Payments from drug & device makers
What this record shows
This record is dominated by royalties or licence payments: $955,506 of the $1,198,084 with a category attached, or 79.8%. Zimmer Biomet accounts for 99.9% of it on its own, with 8 other manufacturers making up the rest. 2025 is the largest year on record at $436,803, 6.1 times the $71,038 reported in 2019. Among orthopaedic surgery clinicians in IL with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 283 payments — averaging $4233.51 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Zimmer Biomet$1.2M
- Stryker$160
- Exactech, Inc.$158
- Encore Medical, LP$121
- Smith+Nephew$107
- Catalyst Orthoscience$50
- plus $117 from 3 others
Across 16 payments — averaging $1959.81 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.
- Zimmer Biomet$31K
What the payments were for
- Royalty or licence$955,50680%
- Consulting fees$67,1566%
- Travel & lodging$22,1772%
- Food & beverage$4,9620%
- Education$148,28312%
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 |
|---|---|---|
| Zimmer Biomet | 270 | $1,197,371 |
| Stryker(2 entities) | 4 | $160 |
| Exactech, Inc. | 1 | $158 |
| Encore Medical, LP | 1 | $121 |
| Smith+Nephew | 1 | $107 |
| Catalyst Orthoscience | 1 | $50 |
| Orthofix Medical, Inc. | 3 | $50 |
| Pacira Pharmaceuticals Incorporated | 1 | $49 |
| Medtronic | 1 | $18 |
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.
- Identity$759,906
- Nexel Elbow$142,783
- Comprehensive Shoulder System$106,255
- ALLIANCE$74,623
- Anatomical Shoulder Bigliani/Flatow$30,688
- ROSA$29,880
- Comprehensive Anatomic$9,000
- Comprehensive Reverse$8,000
- Alliance Glenoid$2,400
- Comprehensive Shoulder$2,400
- COMPREHENSIVE$713
- Persona$534
- Juggerknotless Soft Anchor$338
- Avenir$330
- EQUINOXE$158
- Comprehensive SRS$138
- DJO Surgical AltiVate Reverse$121
- DJO Surgical AltiVate Anatomic System$121
- Bioinductive Implant with Arthroscopic Delivery System - Medium$107
How this compares
$1,198,084 in reported general payments places this provider in the 95th percentile of 844 orthopaedic 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 |
|---|---|---|
| Celecoxib | 14 | $130 |
Paid to pharmacies, not to this prescriber.
Other orthopaedic surgery in Chicago
- Aaron RosenbergChicago$12.4M
- Anish KadakiaChicago$2.1M
- Wellington HsuChicago$1.7M
- Ken YamaguchiChicago$1.7M
- Hue LuuChicago$1.1M
- Alpesh PatelChicago$917K
- Samuel StulbergChicago$852K
- Richard BergerChicago$618K
- Ari KazChicago$343K
- Steven GitelisChicago$324K
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.