Charles Johnson, MD
Clinical Cardiac Electrophysiology · Fort Collins, CONPI 1053317198
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $7,600 of the $12,331 with a category attached, or 61.6%. Abbott accounts for 82.4% of it on its own, with 7 other manufacturers making up the rest. Reporting peaked in 2021 at $8,331 and has fallen 96.1% since, to $327 in 2025. That places this record below the midpoint for clinical cardiac electrophysiology clinicians in CO, where the typical reported total is $11,587.
Across 113 payments — averaging $109.13 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Abbott$10K
- Boston Scientific$2K
- Biotronik Inc.$494
- Medtronic$25
- E.r. Squibb & Sons, L.L.C.$14
- Pfizer$14
- plus $26 from 2 others
What the payments were for
- Consulting fees$7,60062%
- Travel & lodging$8867%
- Food & beverage$3,84631%
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 |
|---|---|---|
| Abbott | 60 | $10,155 |
| Boston Scientific | 41 | $1,602 |
| Biotronik Inc. | 7 | $494 |
| Medtronic | 1 | $25 |
| E.r. Squibb & Sons, L.L.C. | 1 | $14 |
| Pfizer | 1 | $14 |
| Merck | 1 | $14 |
| Regeneron Healthcare Solutions, Inc. | 1 | $13 |
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.
- Accent Pacemaker$7,600
- AVEIR$779
- Allure Quadra RF CRT Pacemaker$149
- Confirm Rx$144
- Acticor 7 VR-T DX$126
- ASSURITY$111
How this compares
$12,331 in reported general payments places this provider in the 50th percentile of 66 clinical cardiac electrophysiology providers in Colorado.
See all clinical cardiac electrophysiology 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 | 276 | $365,829 |
| XareltoRivaroxaban | 66 | $93,533 |
| Flecainide Acetate | 60 | $4,544 |
| Metoprolol Succinate | 118 | $2,266 |
| Diltiazem 24hr Er (Cd)Diltiazem Hcl | 32 | $941 |
| SotalolSotalol Hcl | 14 | $873 |
| Amiodarone Hcl | 50 | $752 |
| Warfarin Sodium | 52 | $601 |
| JantovenWarfarin Sodium | 18 | $348 |
| Metoprolol Tartrate | 32 | $181 |
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 | $14 | $365,829276 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 66 clinical cardiac electrophysiology providers in Colorado.
Other clinical cardiac electrophysiology in Fort Collins
- Ethan EllisFort Collins$144K
- Russell HeathFort Collins$22K
- Robert KiserFort Collins$9K
- David KatzFort Collins$5K
- Srikanth SundaramLittleton$493K
- Bradley MikaelianColorado Springs$364K
- Wendy TzouAurora$350K
- Christopher PorterfieldAurora$340K
- Lohit GargAurora$147K
- Ganesh VenkataramanLakewood$127K
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.