Robert Hacker, DC
Chiropractor · Knoxville, TNNPI 1407947575
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 63 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 16 manufacturers reported payments, led by Amgen at 41.1% of the total. Reporting peaked in 2021 at $469 and has fallen 89.2% since, to $50 in 2022. Among chiropractor clinicians in TN with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 63 payments — averaging $17.48 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Amgen$452
- Collegium Pharmaceutical, Inc.$207
- Biodelivery Sciences International, Inc.$79
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$64
- Redhill Biopharma Inc.$63
- Kaleo, Inc.$57
- plus $180 from 10 others
What the payments were for
- Food & beverage$1,102100%
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 |
|---|---|---|
| Amgen | 24 | $452 |
| Collegium Pharmaceutical, Inc. | 12 | $207 |
| Biodelivery Sciences International, Inc. | 5 | $79 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 3 | $64 |
| Redhill Biopharma Inc. | 4 | $63 |
| Kaleo, Inc. | 3 | $57 |
| Arbor Pharmaceuticals, Inc. | 2 | $28 |
| Pernix Therapeutics Holdings, Inc. | 2 | $28 |
| Orthogenrx Inc. | 1 | $21 |
| GRT US Holding, Inc. | 1 | $19 |
| IBSA Pharma Inc. | 1 | $19 |
| Almatica Pharma LLC | 1 | $16 |
| Pacira Therapeutics, Inc. | 1 | $14 |
| Nevro Corp. | 1 | $12 |
| Boston Scientific | 1 | $12 |
| Assertio Therapeutics, 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.
- AIMOVIG$116
How this compares
$1,102 in reported general payments places this provider in the 95th percentile of 102 chiropractor providers in Tennessee.
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 chiropractor in Knoxville
- Robert MorrisonKnoxville$619
- Jerry RaileyKnoxville$465
- Glen JohnsonKnoxville$365
- Andrew HosenfeldKnoxville$122
- Derek LensgrafKnoxville$112
- Elizabeth LensgrafKnoxville$77
- Cole HosenfeldKnoxville$41
- David NewportKnoxville$33
- Stormy GreenBartlett$2K
- Richard KindJohnson City$1K
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.