A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Mark Christopher Johnson, M.D. with clinicians in the same registry specialty: Diagnostic Radiology (CMS).

DES MOINES, IA · Exact areaEdit location

2024 published service data · 10 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Seth William Gibson, D.O.

Diagnostic Radiology (CMS) · Des Moines, IA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of chest, 1 view (71045)
  • Dxa bone density measurement of hip, pelvis, spine (77080)
86%Service-mix similarityView profile →

William A Manzo, MD

Diagnostic Radiology (CMS) · Des Moines, IA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of chest, 1 view (71045)
  • Dxa bone density measurement of hip, pelvis, spine (77080)
76%Service-mix similarityView profile →

Muhammad Abdul-Wahab, MD

Diagnostic Radiology (CMS) · Des Moines, IA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of chest, 1 view (71045)
  • Dxa bone density measurement of hip, pelvis, spine (77080)
74%Service-mix similarityView profile →

Joseph Jay Vavricek, MD

Diagnostic Radiology · Interventional Radiology (CMS) · Des Moines, IA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of chest, 1 view (71045)
  • Dxa bone density measurement of hip, pelvis, spine (77080)
71%Service-mix similarityView profile →

Austin Peters

Diagnostic Radiology (CMS) · Des Moines, IA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of chest, 1 view (71045)
  • Dxa bone density measurement of hip, pelvis, spine (77080)
71%Service-mix similarityView profile →

Zachary J Viets, MD

Diagnostic Radiology (CMS) · Des Moines, IA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of chest, 1 view (71045)
  • Dxa bone density measurement of hip, pelvis, spine (77080)
70%Service-mix similarityView profile →

Ryan William Buss, M.D.

Diagnostic Radiology (CMS) · Des Moines, IA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of chest, 1 view (71045)
  • Dxa bone density measurement of hip, pelvis, spine (77080)
64%Service-mix similarityView profile →

Raviv Ramdial, MD

Diagnostic Radiology (CMS) · Des Moines, IA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of chest, 1 view (71045)
  • Dxa bone density measurement of hip, pelvis, spine (77080)
51%Service-mix similarityView profile →

Gary L Haynes, D.O.

Diagnostic Radiology (CMS) · Des Moines, IA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • Dxa bone density measurement of hip, pelvis, spine (77080)
  • Ct scan head or brain without contrast (70450)
46%Service-mix similarityView profile →

Daniel J Krejchi, M.D.

Diagnostic Radiology (CMS) · Des Moines, IA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • Dxa bone density measurement of hip, pelvis, spine (77080)
  • Ct scan head or brain without contrast (70450)
39%Service-mix similarityView profile →
How this comparison works

We use the same calendar year of CMS Medicare Physician & Other Practitioners data for both providers. Published non-drug service counts are combined by HCPCS code across places of service. We apply log(1 + count), normalize the vectors, and compare them using cosine similarity.

Candidates share the reference provider’s current NPPES primary taxonomy and match the location you enter. We examine up to 500 candidates in NPI order, then show up to 12 with the highest positive similarity within that set. The score is not a percentile, medical recommendation, or prediction. Suppressed services are not estimated. Medicare fee-for-service data does not describe a provider’s entire practice.

Source: CMS Medicare Physician & Other Practitioners - by Provider and Service : 2024-12-01 · Published May 21, 2026.