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Dr. Christopher M. Mager, MD

Radiology (Diagnostic Radiology Physician)

  • Medicare participating

At a glance

Years since graduation
19
In the NPI registry since
2009
Medicare patients seen, 2024
2,159

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

  • 2007Medical school: University of Minnesota Medical School
  • 2009Registered with an NPI (national billing number; not a license date)

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

  • Diagnostic Radiology Physician primary
    WI license 74857-20 · MN license 53947 · MO license 2012011152

As reported to the NPI registry. To confirm a license is current, check the state medical board.

Map: Radiology per capita by county →

Where they work

Hospitals

Medical groups

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
2,159
Services billed
3,166
Patients’ average age
73
Most frequent Medicare services, 2023
ServiceTimesPatients
X-ray of chest, 2 views349335
Screening mammography268268
Screening 3d breast mammography266266
Dxa bone density measurement of hip, pelvis, spine154154
X-ray of chest, 1 view135115
Ct scan head or brain without contrast132123
Ct scan of abdomen and pelvis with contrast109104
Nuclear medicine study from skull base to mid-thigh with ct scan10498
X-ray of knee, 4 or more views10396
X-ray of foot, minimum of 3 views10396

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.

Other Radiology clinicians in Green Bay

Sources

NPI registry (CMS NPPES, November 2026; record last updated August 25, 2021), Medicare Care Compare, Medicare Physician & Other Practitioners (2024), Medicare Part D Prescribers (2024) and Open Payments (2025). Information is self-reported or billed data and may be out of date; call before visiting.

NPI 1407084478. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.