Donald Siddoway, MD
Clinical Cardiac Electrophysiology · Columbia, SCNPI 1235392093
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (56.3%), travel and lodging and consulting fees — rather than concentrated in one kind of arrangement. 14 manufacturers reported payments, led by Abbott at 54.2% of the total. Reporting peaked in 2024 at $2,035 and has fallen 81.3% since, to $381 in 2025. That places this record below the midpoint for clinical cardiac electrophysiology clinicians in SC, where the typical reported total is $35,448.
Across 104 payments — averaging $72.77 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Abbott$4K
- Medtronic$1K
- Biosense Webster, Inc.$655
- Boston Scientific$617
- Medical Device Business Services, Inc.$407
- Atricure, Inc.$219
- plus $471 from 8 others
What the payments were for
- Consulting fees$7009%
- Travel & lodging$2,60634%
- Food & beverage$4,26256%
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 |
|---|---|---|
| Abbott | 27 | $4,100 |
| Medtronic(2 entities) | 18 | $1,099 |
| Biosense Webster, Inc. | 13 | $655 |
| Boston Scientific | 12 | $617 |
| Medical Device Business Services, Inc. | 2 | $407 |
| Atricure, Inc. | 9 | $219 |
| Cardiva Medical, Inc. | 14 | $185 |
| Johnson & Johnson | 1 | $115 |
| Philips North America LLC | 3 | $70 |
| Cvrx, Inc. | 1 | $30 |
| Biotronik Inc. | 1 | $22 |
| AstraZeneca | 1 | $19 |
| Kiniksa Pharmaceuticals, Ltd. | 1 | $17 |
| Alnylam Pharmaceuticals 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.
- AVEIR$2,209
- Accent Pacemaker$700
- Carto 3$583
- Carto 3 System$341
- ARCTIC FRONT ADVANCE$190
- CardioInsight$167
- Evera$136
- QDOT MICRO Catheter$136
- Claria MRI$134
- Micra$129
- Allure Quadra RF CRT Pacemaker$124
- EP-WorkMate Claris System$122
- Ensite Cardiac Mapping System$121
- Rhythmia Mapping System$119
- XARELTO$115
- Reveal LINQ$103
How this compares
$7,568 in reported general payments places this provider in the 20th percentile of 58 clinical cardiac electrophysiology providers in South Carolina.
See all clinical cardiac electrophysiology providers in South Carolina →
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 | 35 | $34,695 |
| Metoprolol Succinate | 42 | $941 |
| Flecainide Acetate | 15 | $807 |
| Diltiazem 24hr Er (Cd)Diltiazem Hcl | 12 | $193 |
| SotalolSotalol Hcl | 12 | $189 |
Paid to pharmacies, not to this prescriber.
Other clinical cardiac electrophysiology in Columbia
- Sultan SiddiqueColumbia$182K
- Walter MazzeiColumbia$96K
- Todd SennColumbia$49K
- Venkateshwar GottipatyColumbia$46K
- Francis UgoweColumbia$43K
- Jennifer FeldmanColumbia$19K
- Paras PatelColumbia$10K
- Gerald BauknightColumbia$10K
- Hampton CollinsColumbia$22
- Jeffrey WinterfieldCharleston$498K
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.