Dr. Mark C. Johnson, M.D.
Radiology (Diagnostic Radiology Physician)
- Medicare participating
At a glance
- Medical school
- University of Iowa, Rj & L Carver College of Medicine (2005)
- Years since graduation
- 21
- In the NPI registry since
- 2007
- Medicare patients seen, 2024
- 4,073
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
- 2005Medical school: University of Iowa, Rj & L Carver College of Medicine
- 2007Registered 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
-
Diagnostic Radiology Physician primary
IA license 39397
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Mercyone Des Moines Medical Center Des Moines, IA
- Mercyone Newton Medical Center Newton, IA
- Knoxville Hospital & Clinics Knoxville, IA
- Mercyone Centerville Medical Center Centerville, IA
- Manning Regional Healthcare Center Manning, IA
Medical groups
- Diagnostic Imaging Associates, P.c. (19 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
- 4,073
- Services billed
- 5,929
- Patients’ average age
- 75
| Service | Times | Patients |
|---|---|---|
| X-ray of chest, 2 views | 713 | 674 |
| X-ray of chest, 1 view | 510 | 424 |
| Dxa bone density measurement of hip, pelvis, spine | 377 | 375 |
| X-ray of knee, 3 views | 270 | 206 |
| X-ray of lower and sacral spine, 2-3 views | 225 | 211 |
| Ct scan head or brain without contrast | 217 | 204 |
| X-ray of hip, 2-3 views | 207 | 189 |
| Mri scan of arm joint without contrast | 196 | 193 |
| X-ray of abdomen, 2 views | 185 | 178 |
| X-ray of shoulder, minimum of 2 views | 178 | 159 |
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.