Mark E. Kersten, DDS
Dentists (general) (Dentist)
Medicare and federal program status
Opted out of Medicare from August 31, 2017 through August 31, 2027. Medicare does not pay for this clinician’s services: patients with Medicare sign a private contract and pay the clinician directly. They can still order tests and refer Medicare patients to other providers.
Source: CMS Medicare Opt Out Affidavits (record last updated October 15, 2025). Opting out is a legal choice many clinicians make, often to run a cash or concierge practice.
At a glance
- In the NPI registry since
- 2014
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. What an NPI is
Education and training
- 2014Registered with an NPI (national billing number; not a license date)
Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Dentist primary
MN license D13377
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Amoxicillin Other prescribers in Minneapolis, MN | 53 |
| Ibuprofen Other prescribers in Minneapolis, MN | 50 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 3 companies reported 7 payments worth $1,237 in total to this clinician.
| Straumann USA LLC | $1,188 |
|---|---|
| Dentsply Sirona Inc | $34.77 |
| Biohorizons Implant Systems Inc. | $14.12 |
| Travel and Lodging | $886 |
|---|---|
| Food and Beverage | $201 |
| Entertainment | $150 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Straumann USA LLC Jan 11, 2025 | Travel and Lodging travel to Boston, MA | $540 |
| Straumann USA LLC Jan 11, 2025 | Travel and Lodging travel to Boston, MA | $346 |
| Straumann USA LLC Jan 11, 2025 | Entertainment | $150 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.