Mark McKenzie
Internal Medicine · Chattanooga, TNNPI 1821064122
Payments from drug & device makers
What this record shows
This record is dominated by travel and lodging: $1,424 of the $2,109 with a category attached, or 67.5%. 7 manufacturers reported payments, led by Bristol Myers Squibb at 44.4% of the total. Reporting peaked in 2019 at $1,972 and has fallen 99.1% since, to $18 in 2024.
Across 31 payments — averaging $68.03 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Bristol Myers Squibb$936
- Eli Lilly$903
- AbbVie$119
- Sanofi$98
- Boston Scientific$20
- GSK$18
- plus $14 from 1 others
Across 1,212 payments — averaging $9954.73 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.
- Modernatx, Inc.$6.3M
- AbbVie$1.3M
- Pfizer$970K
- Novavax Inc$631K
- Eli Lilly$444K
- Ironwood Pharmaceuticals, Inc$440K
- plus $2M from 26 others
What the payments were for
- Travel & lodging$1,42468%
- Food & beverage$68532%
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 |
|---|---|---|
| Bristol Myers Squibb | 4 | $936 |
| Eli Lilly | 22 | $903 |
| AbbVie | 1 | $119 |
| Sanofi | 1 | $98 |
| Boston Scientific | 1 | $20 |
| GSK | 1 | $18 |
| Gilead | 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.
- CC-90001$861
How this compares
$2,109 in reported general payments places this provider in the 75th percentile of 2,216 internal medicine providers in Tennessee.
Other internal medicine in Chattanooga
- Maighan SeagroveChattanooga$78K
- Carlton VollbergChattanooga$30K
- Jeremy HogstromChattanooga$30K
- Jermaine HogstromChattanooga$29K
- Eugene RyanChattanooga$26K
- John AndersonNashville$1.5M
- Tracie WalkerJackson$488K
- Nathan TrenthamEtowah$404K
- Dennis DeruelleKnoxville$263K
- Devin ShermanFranklin$191K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.