Dr. Mark Linzer, MD
Internal Medicine (Internal Medicine Physician)
- Medicare participating
At a glance
- Medical school
- Johns Hopkins University School of Medicine (1977)
- Years since graduation
- 49
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 27
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. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 1977Medical school: Johns Hopkins University School of Medicine
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
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
-
Internal Medicine Physician primary
MN license 52486
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- North Memorial Health Hospital Robbinsdale, MN
- Hennepin County Medical Center Minneapolis, MN
Medical groups
- Hennepin Healthcare System Inc (871 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 27
- Services billed
- 124
- Patients’ average age
- 67
| Service | Times | Patients |
|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 80 | 28 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 19 | 13 |
| Hospital discharge day management, 30 minutes or less | 19 | 19 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 13 | 13 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Payments from drug and device companies
In 2025, 1 companies reported 3 payments worth $165 in total to this clinician.
| Ortho Solutions Inc | $165 |
|---|
| Food and Beverage | $165 |
|---|
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.