Maria Tam, MD
Obstetrics & Gynecology · Chicago, ILNPI 1003843517
Payments from drug & device makers
Across 532 payments — averaging $710.20 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Intuitive Surgical$168K
- Medtronic$72K
- AbbVie$54K
- Organon$30K
- Covidien LP$22K
- Merck$16K
- plus $16K from 24 others
What the payments were for
- Consulting fees$34,1169%
- Speaking & faculty fees$165,78244%
- Travel & lodging$32,9199%
- Food & beverage$13,9944%
- Education$130,99935%
- Gifts$140%
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 |
|---|---|---|
| Intuitive Surgical | 188 | $168,150 |
| Medtronic | 79 | $71,994 |
| AbbVie(2 entities) | 117 | $53,632 |
| Organon | 47 | $30,212 |
| Covidien LP | 19 | $22,147 |
| Merck | 22 | $15,544 |
| Coopersurgical, Inc. | 11 | $11,175 |
| GE HealthCare | 2 | $2,572 |
| Applied Medical Resources Corporation | 4 | $778 |
| Gynesonics, Inc. | 5 | $375 |
| Sumitomo Pharma America, Inc. | 4 | $179 |
| Pacira Pharmaceuticals Incorporated | 2 | $149 |
| Davol Inc. | 1 | $125 |
| Dysis Medical, Inc. | 4 | $114 |
| Aspira Women's Health Inc | 3 | $110 |
| Baxter Healthcare | 1 | $93 |
| Myovant Sciences Inc. | 3 | $73 |
| Minerva Surgical, Inc | 4 | $65 |
| LSI Solutions Inc | 1 | $54 |
| Avion Pharmaceuticals | 3 | $54 |
| Hologic Sales And Service, LLC | 2 | $49 |
| Vertical Pharmaceuticals, LLC | 2 | $30 |
| Bayer | 1 | $25 |
| Pfizer | 1 | $24 |
| Millicent US Inc | 1 | $24 |
| Agile Therapeutics, Inc. | 1 | $20 |
| Exeltis, USA Inc. | 1 | $19 |
| Olympus America Inc. | 1 | $14 |
| Monaghan Medical Corporation | 1 | $14 |
| Medline Industries LP | 1 | $12 |
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.
- Da Vinci Surgical System$167,160
- TruClear$62,955
- NEXPLANON$44,196
- Orilissa$41,890
- Equipment$10,688
- LigaSure$9,170
- ORIAHNN$8,125
- HysteroLux$6,000
- GelPOINT V-Path$1,143
- Versana$1,012
- Advincula Delineator Uterine Manipulator$350
- SONATA SONOGRAPHY-GUIDED TRANSCERVICAL FIBROID ABLATION SYSTEM$324
- PROGEL$125
- EXPAREL$123
- MYFEMBREE$108
How this compares
$377,824 in reported general payments places this provider in the 95th percentile of 1,732 obstetrics & gynecology 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 |
|---|---|---|
| Estradiol | 16 | $665 |
| Ibuprofen | 11 | $26 |
| Misoprostol | 15 | $25 |
Paid to pharmacies, not to this prescriber.
Other obstetrics & gynecology in Chicago
- Lee ShulmanChicago$577K
- Amy WhitakerChicago$351K
- Gregory UrsinoChicago$242K
- Magdy MiladChicago$211K
- Joseph ThomasChicago$180K
- Ayman Al-HendyChicago$142K
- Nicole TaskerChicago$125K
- Ashlesha PatelChicago$81K
- Teresa HubkaChicago$62K
- Angela ChaudhariChicago$52K
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.