William Chisholm, MD
Geriatric Medicine · Aurora, CONPI 1932425923
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 99.6% of the total across 85 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 24 manufacturers reported payments, led by Johnson & Johnson at 24.9% of the total. Reporting peaked in 2019 at $945 and has fallen 63.8% since, to $342 in 2023. Among geriatric medicine clinicians in CO with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 85 payments — averaging $16.88 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Johnson & Johnson$358
- Sunovion Pharmaceuticals Inc.$160
- Novo Nordisk$109
- Pfizer$108
- Teva Pharmaceuticals USA, Inc.$99
- Novartis$63
- plus $538 from 18 others
What the payments were for
- Food & beverage$1,428100%
- Education$60%
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 |
|---|---|---|
| Johnson & Johnson | 20 | $358 |
| Sunovion Pharmaceuticals Inc. | 11 | $160 |
| Novo Nordisk | 6 | $109 |
| Pfizer | 6 | $108 |
| Teva Pharmaceuticals USA, Inc. | 6 | $99 |
| Novartis | 4 | $63 |
| Lilly USA, LLC | 3 | $57 |
| Astellas Pharma US Inc | 3 | $50 |
| AbbVie | 2 | $50 |
| AstraZeneca(2 entities) | 3 | $48 |
| Avanir Pharmaceuticals, Inc. | 3 | $45 |
| Neurocrine Biosciences, Inc. | 2 | $40 |
| Sumitomo Pharma America, Inc. | 2 | $38 |
| Melinta Therapeutics, LLC | 2 | $30 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 2 | $24 |
| Boehringer Ingelheim | 2 | $22 |
| Acadia Pharmaceuticals Inc | 1 | $22 |
| Sanofi Pasteur Inc. | 1 | $20 |
| Amgen | 1 | $20 |
| Nevro Corp. | 1 | $18 |
| Seqirus USA Inc | 1 | $17 |
| Hologic Sales And Service, LLC | 1 | $14 |
| Lucid Diagnostics Inc. | 1 | $13 |
| Scilex Pharmaceuticals Inc. | 1 | $12 |
How this compares
$1,435 in reported general payments places this provider in the 90th percentile of 74 geriatric medicine providers in Colorado.
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 |
|---|---|---|
| EliquisApixaban | 99 | $43,059 |
| MyrbetriqMirabegron | 36 | $11,725 |
| JardianceEmpagliflozin | 16 | $7,823 |
| Rasagiline Mesylate | 15 | $5,290 |
| XareltoRivaroxaban | 18 | $5,030 |
| Levothyroxine Sodium | 270 | $2,913 |
| Atorvastatin Calcium | 156 | $2,205 |
| Quetiapine Fumarate | 99 | $1,907 |
| Sertraline Hcl | 109 | $1,560 |
| Mirtazapine | 46 | $1,533 |
| Olanzapine | 45 | $1,127 |
| Gabapentin | 61 | $1,089 |
| Escitalopram Oxalate | 65 | $1,063 |
| Venlafaxine Hcl ErVenlafaxine Hcl | 12 | $1,057 |
| Pantoprazole Sodium | 38 | $1,015 |
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 |
|---|---|---|
| PfizerEliquis | $108 | $43,05999 claims |
| Astellas Pharma US IncMyrbetriq | $50 | $11,72536 claims |
| Boehringer IngelheimJardiance | $22 | $7,82316 claims |
| Johnson & JohnsonXarelto | $358 | $5,03018 claims |
| Lilly USA, LLCOlanzapine | $57 | $1,12745 claims |
| Teva Pharmaceuticals USA, Inc.Albuterol Sulfate | $99 | $68615 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 90th percentile of 74 geriatric medicine providers in Colorado.
Other geriatric medicine in Aurora
- Michael WassermanAurora$82K
- William HiattAurora$27K
- Herman HasselkusAurora$22K
- Jacob WalkerAurora$2K
- Madhu ReddyAurora$1K
- Sophie ClarkAurora$1K
- Tyson GarfieldAurora$953
- Leslie ReitmanAurora$654
- Shirley FrantzAurora$536
- Devin GilhulyAurora$408
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.