David Giammar, MD
Colon & Rectal Surgery · Westerville, OHNPI 1154307858
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $1,074 of the $1,688 with a category attached, or 63.7%. 21 manufacturers reported payments, led by Covidien LP at 40.3% of the total. Reporting peaked in 2019 at $866 and has fallen 80.0% since, to $174 in 2025. That places this record below the midpoint for colon & rectal surgery clinicians in OH, where the typical reported total is $1,025.
Across 41 payments — averaging $41.16 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Covidien LP$680
- Takeda Pharmaceuticals U.S.A., Inc.$172
- Medtronic$126
- Medical Device Business Services, Inc.$122
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$95
- GSK$67
- plus $426 from 15 others
What the payments were for
- Travel & lodging$60336%
- Food & beverage$1,07464%
- Entertainment$111%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| Covidien LP | 5 | $680 |
| Takeda Pharmaceuticals U.S.A., Inc. | 6 | $172 |
| Medtronic | 4 | $126 |
| Medical Device Business Services, Inc. | 1 | $122 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 5 | $95 |
| GSK | 1 | $67 |
| Kerecis Limited | 2 | $65 |
| TELA Bio, Inc. | 2 | $48 |
| Johnson & Johnson | 2 | $47 |
| Davol Inc. | 1 | $35 |
| Merck | 2 | $33 |
| Vertex | 1 | $26 |
| Convatec Inc. | 1 | $26 |
| Stryker | 1 | $23 |
| Bristol Myers Squibb | 1 | $22 |
| KCI USA, Inc. | 1 | $22 |
| THD America, Inc. | 1 | $21 |
| Hologic Sales And Service, LLC | 1 | $19 |
| AbbVie | 1 | $15 |
| Cumberland Pharmaceuticals, Inc. | 1 | $15 |
| Mauna Kea Technologies, Inc. | 1 | $11 |
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.
- ProGrip$603
- Mega Power$122
- Mega Soft$122
- Mega Vac$122
- Ultra Vac$122
How this compares
$1,688 in reported general payments places this provider in the 50th percentile of 101 colon & rectal surgery 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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| LinzessLinaclotide | 13 | $7,476 |
| Ondansetron OdtOndansetron | 16 | $254 |
| Metronidazole | 23 | $179 |
| Hydromorphone Hcl | 20 | $44 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| AbbVieLinzess | $15 | $7,47613 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 50th percentile of 101 colon & rectal surgery providers in Ohio.
Other colon & rectal surgery in Westerville
- Janice RaffertyCincinnati$164K
- Vincent ObiasCleveland$124K
- David RosenCleveland$102K
- Jean AshburnCleveland$81K
- Matthew KaladyColumbus$66K
- Anna SpivakCleveland$54K
- Scott SteeleCleveland$28K
- Michael LiuCleveland$18K
- Conor DelaneyCleveland$16K
- Gennaro LabellaMason$14K
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.