Christopher Porterfield, MD
Clinical Cardiac Electrophysiology · Aurora, CONPI 1689792327
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $251,252 of the $339,725 with a category attached, or 74.0%. Biosense Webster, Inc. accounts for 69.2% of it on its own, with 27 other manufacturers making up the rest. 2025 is the largest year on record at $189,005, more than ten times the $4,134 reported in 2019. Among clinical cardiac electrophysiology clinicians in CO 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 661 payments — averaging $513.96 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Biosense Webster, Inc.$235K
- Abbott$37K
- Medical Device Business Services, Inc.$32K
- Impulse Dynamics (USA) Inc.$11K
- Cardiva Medical, Inc.$6K
- Medtronic$5K
- plus $13K from 22 others
Across 80 payments — averaging $3492.78 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.
- Cardiva Medical, Inc.$100K
- Janssen Research & Development, LLC$93K
- Cvrx, Inc.$36K
- Impulse Dynamics (USA) Inc.$35K
- Abbott$15K
What the payments were for
- Consulting fees$251,25274%
- Speaking & faculty fees$21,0506%
- Travel & lodging$47,80814%
- Food & beverage$19,6156%
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 |
|---|---|---|
| Biosense Webster, Inc. | 274 | $235,042 |
| Abbott | 139 | $37,052 |
| Medical Device Business Services, Inc. | 32 | $32,375 |
| Impulse Dynamics (USA) Inc. | 26 | $10,674 |
| Cardiva Medical, Inc. | 7 | $6,058 |
| Medtronic(2 entities) | 38 | $5,297 |
| Boston Scientific | 67 | $4,136 |
| Cvrx, Inc. | 14 | $2,878 |
| Pfizer | 7 | $2,804 |
| ZOLL Respicardia, Inc. | 3 | $1,282 |
| Philips North America LLC | 11 | $392 |
| Biotronik Inc. | 9 | $329 |
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 4 | $301 |
| Atricure, Inc. | 3 | $216 |
| Inari Medical, Inc. | 1 | $215 |
| Abiomed | 3 | $207 |
| Novartis | 7 | $148 |
| E.r. Squibb & Sons, L.L.C. | 3 | $70 |
| Amgen | 4 | $66 |
| Kestra Medical Technology Services, Inc. | 1 | $29 |
| Siemens Medical Solutions USA, Inc. | 1 | $25 |
| Cardiofocus, Inc. | 1 | $25 |
| Cleerly, Inc. | 1 | $21 |
| Alnylam Pharmaceuticals Inc. | 1 | $20 |
| Merck | 1 | $19 |
| Sanofi-aventis U.S. LLC | 1 | $16 |
| Johnson & Johnson | 1 | $15 |
| AstraZeneca | 1 | $12 |
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.
- Carto 3$223,163
- OPTIMIZER$16,998
- EnSite Precision Cardiac Mapping System$7,722
- ENSITE PRECISION$6,804
- Carto 3 System$6,235
- TACTICATH ABLATION CATHETER, SENSOR ENABLED$5,788
- Nanostim Leadleas Pacemaker$4,451
- Cardiva VASCADE MVP VVCS 6-12F$3,604
- Ensite Cardiac Mapping System$3,275
- Barostim Neo System$2,668
- ELIQUIS$2,625
- Advisor Catheter$2,582
- Vascular Closure Device$2,375
- OPTIMIZER SMART SYSTEM$1,791
- Thermocool SF$1,678
- AVEIR$1,466
- EVERA MRI XT DR SURESCAN$1,341
- remede System$1,282
- WATCHMAN Access System$906
- GENERAL - THERAPIES$888
How this compares
$339,725 in reported general payments places this provider in the 95th 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 | 224 | $278,306 |
| XareltoRivaroxaban | 62 | $49,453 |
| EntrestoSacubitril/Valsartan | 23 | $36,827 |
| MultaqDronedarone Hcl | 16 | $24,162 |
| FarxigaDapagliflozin Propanediol | 16 | $21,363 |
| Dofetilide | 22 | $3,869 |
| Nebivolol Hcl | 12 | $1,882 |
| Flecainide Acetate | 40 | $1,808 |
| ClopidogrelClopidogrel Bisulfate | 122 | $1,313 |
| Metoprolol Succinate | 76 | $1,129 |
| SotalolSotalol Hcl | 41 | $744 |
| Diltiazem 24hr Er (Cd)Diltiazem Hcl | 26 | $699 |
| Potassium Chloride | 24 | $568 |
| Carvedilol | 42 | $545 |
| Atorvastatin Calcium | 44 | $454 |
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 | $2,804 | $278,306224 claims |
| Johnson & JohnsonXarelto | $15 | $49,45362 claims |
| NovartisEntresto | $148 | $36,82723 claims |
| Sanofi-aventis U.S. LLCMultaq | $16 | $24,16216 claims |
| AstraZenecaFarxiga | $12 | $21,36316 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 95th percentile of 66 clinical cardiac electrophysiology providers in Colorado.
Other clinical cardiac electrophysiology in Aurora
- Wendy TzouAurora$350K
- Lohit GargAurora$147K
- Margot VlokaAurora$104K
- Syed Rafay Ali SabzwariAurora$80K
- Amneet SandhuAurora$53K
- Ryan AleongAurora$33K
- Dustin NashAurora$30K
- Ryan BorneAurora$30K
- Lukasz CerbinAurora$18K
- Dominik WiktorAurora$9K
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.