Andrew Chang, MD
Obstetrics & Gynecology · Hamilton, OHNPI 1356784441
Payments from drug & device makers
Across 85 payments — averaging $102.25 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Intuitive Surgical$7K
- Sage Therapeutics, LLC$230
- Pfizer$147
- Sumitomo Pharma America, Inc.$127
- Astellas Pharma US Inc$112
- Bayer$110
- plus $902 from 20 others
What the payments were for
- Travel & lodging$1,03612%
- Food & beverage$1,63819%
- Education$6,01869%
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 | 7 | $7,065 |
| Sage Therapeutics, LLC | 12 | $230 |
| Pfizer | 7 | $147 |
| Sumitomo Pharma America, Inc. | 8 | $127 |
| Astellas Pharma US Inc | 6 | $112 |
| Bayer | 5 | $110 |
| Millicent US Inc | 5 | $101 |
| Hologic Sales And Service, LLC | 4 | $89 |
| Organon | 4 | $88 |
| Exact Sciences | 3 | $79 |
| AbbVie | 4 | $79 |
| Mayne Pharma Commercial LLC | 4 | $75 |
| Johnson & Johnson | 2 | $59 |
| Nevro Corp. | 1 | $57 |
| Gynesonics, Inc. | 1 | $32 |
| Vertex | 2 | $31 |
| Viiv Healthcare Company | 1 | $31 |
| Daiichi Sankyo Inc. | 1 | $31 |
| LSI Solutions Inc | 1 | $27 |
| BD | 1 | $22 |
| Baxter Healthcare | 1 | $19 |
| Supernus Pharmaceuticals, Inc. | 1 | $19 |
| Coloplast | 1 | $18 |
| Tolmar, Inc. | 1 | $16 |
| Lilly USA, LLC | 1 | $15 |
| Therapeuticsmd, Inc. | 1 | $14 |
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$5,517
- DAVINCI XI$1,500
How this compares
$8,691 in reported general payments places this provider in the 90th percentile of 1,376 obstetrics & gynecology providers in Ohio.
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 obstetrics & gynecology in Hamilton
- Margaret RheeAkron$19.6M
- Harold GreenColumbus$2.3M
- Stuart WeprinEnglewood$1.2M
- Abner CorderoTiffin$985K
- Jeffrey MangelCleveland$886K
- Angelina GangestadCleveland$744K
- Gerard ReillyCincinnati$582K
- Sarah ArtmanHilliard$512K
- Samir AhujaMentor$430K
- David SheynCincinnati$330K
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.