Gregory Kalemkerian, MD
Medical Oncology · Ann Arbor, MINPI 1316023278
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 2 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. Every reported general payment came from a single manufacturer, E.r. Squibb & Sons, L.L.C.. That places this record below the midpoint for medical oncology clinicians in MI, where the typical reported total is $1,832.
Across 2 payments — averaging $101.02 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- E.r. Squibb & Sons, L.L.C.$202
Across 107 payments — averaging $26,320 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.
- Merck$2.2M
- Takeda Pharmaceuticals U.S.A., Inc.$302K
- Daiichi Sankyo Inc.$135K
- Hoffmann-la Roche Limited$103K
- Blueprint Medicines Corporation$57K
- E.r. Squibb & Sons, L.L.C.$30K
- plus $9K from 1 others
What the payments were for
- Food & beverage$202100%
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 |
|---|---|---|
| E.r. Squibb & Sons, L.L.C. | 2 | $202 |
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.
- OPDIVO$105
How this compares
$202 in reported general payments places this provider in the 25th percentile of 170 medical oncology providers in Michigan.
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 |
|---|---|---|
| TagrissoOsimertinib Mesylate | 68 | $943,951 |
| GavretoPralsetinib | 11 | $186,397 |
| EliquisApixaban | 26 | $27,942 |
| Dexamethasone | 16 | $421 |
| Prochlorperazine Maleate | 14 | $390 |
| Ondansetron Hcl | 43 | $334 |
| Levothyroxine Sodium | 11 | $165 |
| Omeprazole | 15 | $144 |
| Prednisone | 31 | $101 |
Paid to pharmacies, not to this prescriber.
Other medical oncology in Ann Arbor
- Harry ErbaAnn Arbor$1.1M
- Frank WeinbergAnn Arbor$195K
- Francis WordenAnn Arbor$142K
- Maha HussainAnn Arbor$114K
- Moshe TalpazAnn Arbor$83K
- Vaibhav SahaiAnn Arbor$80K
- Howard TerebeloAnn Arbor$47K
- Angel QinAnn Arbor$41K
- Erin CobainAnn Arbor$38K
- Phillip PalmbosAnn Arbor$37K
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.