Donald Nixdorf, DDS
Dentist · Minneapolis, MNNPI 1538211727
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $167,186 of the $177,951 with a category attached, or 94.0%. Sirona Dental Systems GmbH accounts for 88.1% of it on its own, with 8 other manufacturers making up the rest. Reporting peaked in 2022 at $114,862 and has fallen 99.6% since, to $479 in 2025. Among dentist clinicians in MN 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 75 payments — averaging $2372.68 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Sirona Dental Systems GmbH$157K
- Biohaven Pharmaceutical Holding Company Ltd.$11K
- Pfizer$4K
- Biohaven Pharmaceuticals, Inc.$4K
- Dentsply Sirona Inc$1K
- Siemens Medical Solutions USA, Inc.$232
- plus $306 from 3 others
Across 2 payments — averaging $9264.33 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.
- Biohaven Pharmaceutical Holding Company Ltd.$19K
What the payments were for
- Consulting fees$167,18694%
- Speaking & faculty fees$2,2751%
- Travel & lodging$7,5714%
- Food & beverage$9191%
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 |
|---|---|---|
| Sirona Dental Systems GmbH | 24 | $156,687 |
| Biohaven Pharmaceutical Holding Company Ltd. | 3 | $11,376 |
| Pfizer | 1 | $4,225 |
| Biohaven Pharmaceuticals, Inc. | 1 | $4,125 |
| Dentsply Sirona Inc | 36 | $1,001 |
| Siemens Medical Solutions USA, Inc. | 4 | $232 |
| Maillefer Instruments Holding Sarl | 4 | $213 |
| Dentsply IH Germany | 1 | $76 |
| AbbVie | 1 | $17 |
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.
- NURTEC ODT$11,376
- CEREC$413
- Consumable Dentistry$143
How this compares
$177,951 in reported general payments places this provider in the 95th percentile of 1,245 dentist providers in Minnesota.
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 |
|---|---|---|
| Oxcarbazepine | 18 | $929 |
| Lacosamide | 11 | $534 |
| Clonazepam | 28 | $156 |
Paid to pharmacies, not to this prescriber.
Other dentist in Minneapolis
- Laurence GaalaasMinneapolis$27K
- Mark KerstenMinneapolis$19K
- Akil AlexanderMinneapolis$7K
- Douglas WolffMinneapolis$4K
- Claire MielkeMinneapolis$3K
- Beth GroenkeEdina$34K
- Mark RoettgerLake Elmo$23K
- George WinnNew Prague$22K
- Cam-Tu DallugeChanhassen$20K
- Michael Regan AndersonRochester$17K
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.