Mark Heidenreich, MD
Orthopaedic Surgery · Sioux Falls, SDNPI 1104206838
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $2,524 of the $3,889 with a category attached, or 64.9%. Stryker accounts for 86.6% of it on its own, with 7 other manufacturers making up the rest. Reporting peaked in 2022 at $2,220 and has fallen 85.4% since, to $323 in 2025.
Across 47 payments — averaging $82.75 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Stryker$3K
- Johnson & Johnson$280
- Smith+Nephew$115
- Zimmer Biomet$39
- Onkos Surgical, Inc.$35
- Biocomposites Inc$27
- plus $25 from 2 others
What the payments were for
- Travel & lodging$1,36535%
- Food & beverage$2,52465%
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 |
|---|---|---|
| Stryker | 33 | $3,368 |
| Johnson & Johnson | 3 | $280 |
| Smith+Nephew | 4 | $115 |
| Zimmer Biomet | 1 | $39 |
| Onkos Surgical, Inc. | 1 | $35 |
| Biocomposites Inc | 1 | $27 |
| Molnlycke Health Care US, LLC | 1 | $18 |
| Kinex Medical Company LLC | 3 | $7 |
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.
How this compares
$3,889 in reported general payments places this provider in the 55th percentile of 92 orthopaedic surgery providers in South Dakota.
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 |
|---|---|---|
| Oxycodone Hcl | 48 | $166 |
| Tramadol Hcl | 49 | $159 |
| Ondansetron Hcl | 45 | $121 |
| Doxycycline Hyclate | 11 | $109 |
| Meloxicam | 12 | $25 |
Paid to pharmacies, not to this prescriber.
Other orthopaedic surgery in Sioux Falls
- Keith BaumgartenSioux Falls$286K
- Nathan SkelleySioux Falls$191K
- John FarynaSioux Falls$160K
- Geoffrey HaftSioux Falls$84K
- Anthony FiegenSioux Falls$45K
- Alan YanSioux Falls$40K
- Michael AdlerSioux Falls$28K
- Gregory NeelySioux Falls$26K
- Clint BengeSioux Falls$18K
- Jason HurdSioux Falls$16K
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.